E-mail: admin@worldnanoconference.com | USA : +1-646-828-7579, UK : +44-203-695-1242 | October 16-18, 2017, Dubai, UAE  

SCIENTIFIC PROGRAM

Keynote Speaker

Sang Yeol Lee
Cheongju University, Republic of Korea
Title: Nano-layered structure of transparent conducting amorphous oxides for low emissive smart window and green building energy efficiency

Biography: Dr. Sang Yeol Lee has been a full professor at the department of semiconductor engineering in Cheongju University from 2011. He finished his Ph.D at the department of electrical and computer engineering in State University of New York at Buffalo, NY, USA in the year of 2002. He worked as a senior researcher at Electronics and Telecommunications Research Institute (ETRI) in Korea until 1995 and full professor in Yonsei University until 2007. He also worked as a principle research scientist in KIST(Korea Institute of Science and Technology) until 2011. He worked Los Alamos National Lab in USA as a visiting scholar from 2002 to 2003 in Electronic Device Team. His major research interests are oxides nano-strucutres for low emissivity, oxide electronics including oxide thin film transistors for next generation display applications and logic circuits for IC applications, oxide nano-bio sensors, touch screen panels with TCOs, nanoelectronics and memory devices. He has been served as organizers, chairs, key-note speakers and many invited speakers in international conferences including MRS-spring 2014 at San Francisco(USA) and AVS 2015 at San Jose(USA) and published more than 200 papers in notable journals.

Abstract: Nano-layered structures for low emissive smart window application have been fabricated by using controlled multilayer system of amorphous transparent semiconductor and metallic Ag. Thickness of multilayered film in nano scale has been systematically changed for high transmittance in visible range and low emissivity in infrared range for energy saved low emissivity applications. The simulation and experimental results of the transmittance with different Ag thicknesses have been compared to explore the possibility of the improved optical property with thinner Ag layer structure and the transparent conducting oxides applications for transparent electrodes. It has been found that the formation of thin Ag nano-layer has been transited from island formation to a continuous layered structure occurred at above certain critical thickness. Continuity of the Ag nano-layer is very important for the optical properties to obtain low emissivity. The thickness of Ag layer can be decreased mainly due to amorphous oxide layer having smooth surface roughness and low surface energy. This could provide the possibility of low emissivity window applications with low cost for green building energy efficiency.


Keynote Speaker

Olga E. Glukhova
Saratov State University,
Russian Federation

Title: Novel hybrid carbon materials and their applications in the development of nanoelectronics and nanophotonics

Biography: O.E. Glukhova, Doctor of science in physics and mathematics, now is a head of Department of Radiotechnique and electrodynamics at Saratov State University and leads the Division of Mathematical modeling in Educational and scientific institution of nanostructures and biosystems at Saratov State University. She received her DSc degree in solid state electronics and nanoelectronics from Saratov State University in 2009. Her main fields of investigation are: nanoelectronics, molecular modeling of biomaterials and nanostructures, molecular electronics, mechanics of nanostructures, quantum chemistry and molecular dynamics, carbon nanostructures (fullerenes, nanotubes, graphene, graphane). She has published about 170 peer-reviewed journal papers and four monographs

Abstract: At the present, one of the most perspective directions in materials science is the development of 2D semiconductor materials promising as the element base of multifunctional electronic devices. 2D-materials based on graphene obtained advantages over possible analogues due to features of their structure, namely the atomic thickness and hexagonal lattice. Also, 2D-graphene materials look attractive from an optical point of view. In particular, some graphene-based devices of photonics and optoelectronics have already proposed. Among these devices there are transparent electrodes in displays, solar cells, photodetectors, optical modulators [1-2]. These devices work in a very wide range of wavelengths - from the ultraviolet, visible and near infrared regions of the spectrum to the middle and far infrared regions, as well as the terahertz range. Other perspective materials for optoelectornics and nanophotonics are the carbon nanotubes. Earlier, the models of carbon nanotube-based photovoltaic and light-emitting diodes were presented [3]. Currently, the actual problem is the development of element base for optical devices and photonics new generation of working in a broad frequency range. Using modern methods of predictive modeling and technologies for synthesis of hybrid carbon nanostructures we have developed the models of new nanodevices. In particular, we have created the prototypes of nanodevices for detection of THz radiation on the basis of carbon nanotubes with encapsulated fullerenes. A new type of polarizer based on 2D-hybrid graphene/carbon nanotubes composite is developed. New electronic and optical properties of 2D- and 3D-carbon composite materials are demonstrated.


Keynote Speaker

Alexander M. Korsunsky
University of Oxford,
UK

Title: FIB-DIC mechanical microscopy investigation of Nature’s strain engineering of the human dentine-enamel junction

Biography: Professor Alexander M. Korsunsky (AMK) is a world-leader in engineering microscopy of materials systems and structures for optimisation of design, durability and performance. He leads MBLEM lab at the University of Oxford, and the Centre for In situ Processing Science (CIPS) at Research Complex at Harwell. He consults Rolls-Royce plc on matters of residual stress and structural integrity, and is Editor-in-Chief of Materials & Design, a major Elsevier journal (2016 impact factor 3.997). Tan Sui and AMK lead a major EPSRC research project on nanoscale analysis and modelling of human dental caries.

Abstract: Human dental tissues are hydrated biological mineral composites of hydroxyapatite crystallites within an organic matrix. Dentine and enamel have a hierarchical structure that delivers their versatile mechanical properties. A strong and durable bond between dentine and enamel is formed by the dentine enamel junction (DEJ), an important biological interface that resists failure under long-term harsh thermal and mechanical conditions in the mouth, and only succumbs to disease such as dental caries. Understanding the underlying reasons for this remarkable combination of strength and toughness remains an important challenge, both in the context of dentistry, and from the point of view of pursuing biomimetic advanced materials engineering. One may hypothesise that residual strain develops in the vicinity of the DEJ during odontogenesis (tooth formation). The experimental and interpretational challenges that could not be overcome until recently presented an obstacle to the evaluation of residual stress in the vicinity of the DEJ at the appropriate spatial resolution. We used the recently developed FIB-DIC micro-ring-core method to determine the residual elastic strain at micron resolution. The residual strain profiling across the transition from dentine to enamel are correlated with the study of internal architecture using X-ray scattering (SAXS/WAXS). We illustrate how this provides improved insight into the origins of the remarkable performance of the DEJ.


Keynote Speaker

Adnane Abdelghani
National Institute of Applied Science and Technology,
Tunisia

Title: Nanosensors and New ideas of Start-Up

Biography: Prof.Dr.A.Abdelghani is a Full Professor at the National Institute of Applied Science and Technology (INSAT, Tunisia) working mainly in the field of Microsensors and Microsystems. He obtained the Habilitation in Physics in Tunisia (faculty of Science of Tunis) in 2004 and a Habilitation (worlwide recognition for conducting and leading research) in "Sciences pour l’Ingénieur" in 2009 at the Ecole Normale Supérieur de Cachan (France). He is now the leader and principal investigator of a research group working mainly on gas sensors based on functionalized carbon nanotubes (metallic oxides, nanowires, nanoneedles, polymers) and on the development of interdigitated gold microelectrodes integrated in microfluidic cell for bacteria analysis in biologic medium. He published more than 90 papers in International Journals (H-index 24, December 2016) and supervised more than 12 Ph.D theses and 30 master’s student. He is deeply involved in industrial applications in his field of research with implications for the design and the development of affordable and cost-effective sensing devices for diagnostics and theranostics which will have an effective impact in the developing countries. He received the Tunisian President Award of the “best scientific researcher” in Tunisia in 22 July 2015.

Abstract: In this work, we present an approach for the use of nanosensors for analyte (pesticides, bacteria, heavy ions, C-Reactive Protein, neurotoxin gaz,vapors, etc..) detection for different applications (food analysis, water analysis, medical diagnostic, security, environment, etc..). Most of the analyze detection systems used are time consuming, enable remote sensing and need different steps of preparation. The development of new devices needs laboratory experiment for stability, rapidity and reproducibility studies. We will show the need of the market and the applications for such devices in biotechnology, medicine and security.


Keynote Speaker

Alessandro Di Cerbo
University of Modena and Reggio Emilia, Italy
Title: Mechanical phenotyping characterization of K562 cells challenged with oxytetracycline

Biography: In 2007 he achieved the Master Degree in Medical Biotechnologies at University of Modena (Italy), in 2011 obtained the title of PhD in nanoscience and nanotechnology at the same University and in 2016 he got the post graduate diploma in Clinical Biochemistry at University “G. d’Annunzio” of Chieti (Italy). As a postdoc he conducted highly interdisciplinary researches, ranging from nanotechnology to nanomedicine, microbiology, nutrition and translational medicine focusing on the mutual biological interactions between nutraceuticals, drugs and living systems. He is author or co-author of more than 40 articles in peer-reviewed international journals.

Abstract: Antibiotics have generally the purpose of ensuring wellness. A human clinical study revealed huge amounts of oxytetracycline (OTC) and doxycycline in 15 gym-trained subjects, heavy meat consumers, which were affected by several food intolerances and had never used antibiotics in their life [1]. Subsequent in vitro studies suggested a toxic role for OTC, which resulted in a marked pro-inflammatory effect, e.g. IFN-γ release, both in canine and human peripheral blood lymphocytes as well as a pro-apoptotic affect on K562 cells [2, 3]. Now we investigated the behavior of K562 cells challenged with OTC for different incubation times by using the Micropipette Aspiration Technique. We observed that, in the first stage of apoptotic process, OTC significantly increases the cortical tension and the formation of blebs in K562 cells giving rise to specific behaviors while these are aspirated inside a micropipette. In this context, alterations of mechanical properties of living cells might be considered as reliable markers of the presence of a pathological state. Moreover, this potential toxicity of OTC, widely present in meat meals (for animals pet food) and intensive farming-derived meat (for human food), appears of great relevance suggesting a possible implication for the onset of new health risks, depending on the site of entry of OTC in the food supply chain.


Keynote Speaker

ENRICO SABBIONI
Università degli Studi di Milano,
Italy

Title: A FIRST DECADE OF NANOTOXICOLOGY RESEARCH-WHERE ARE WE?

Biography:

Abstract: Nanotechnology and nanoscience represent a technological tsunami for the development of innovative material and new productive sectors at the service of citizens. Nanoscale materials (NM) exhibit properties different from those exhibited on macroscale and their extraordinary properties enable unique applications, e.g. in ceramic, textile, cosmetic, optic, chemical, food industry and biomedicine. In this context, the great innovation potential of NM has led some people to label them as “nano-angels”. However, in spite of hundreds of NM-containing products are already in commercial production, toxicological evidences are emerging concerning their harmful effects to biological systems (e.g. induction of cytotoxic, genotoxic, cardiotoxic effects, oxidative stress and interaction with the immune system), and a huge health and safety questions remain unsolved. This is enough for some people to label NM as “nano-demons”. This dualism, based mostly on emotion than on reliable scientific data, has raised heated controversy in the scientific community, with debates dominated by severe disputes between scientism and technophobia that disconcert a public opinion already per se poorly informed. As the public interest in “nano” and its societal implications is strong it is not surprising that researchers and governmental organizations are pressed to consider seriously the need to assess potential health risks of NM before they become ubiquitous in every aspects of life. Unfortunately, at present, the scientific community has not reached a consensus about the health safety of NM, being the scientific knowledge inadequate for a risk assessment. In this context, a new emerging discipline, nanotoxicology has become a new frontier in nanoparticle toxicology relevant to workplace, general environment and consumer safety. However, the issue of nanotoxicology research is more complicated than previously thought and proactive multidisciplinary research is an urgent need for a mechanistic understanding of the interaction of NM with biological systems, particularly to clarify the relations between their physico-chemical properties (size, shape, surface chemistry, aggregation) and the biological responses. The aim of this presentation is to highlight key aspects emerged in the first decade of nanotoxicology research, from the origin to the present, for the development of sustainable NM that at present we cannot be considered exclusively as “angels” or “demons”.


Advanced Nanomaterials

Session Introduction

Gregor T. Dahl
University of Hamburg, Germany
Title: Thermal stability through doping: zirconia nanoparticles for applications in hightemperature photonics

Biography: Gregor T. Dahl studied chemistry and biochemistry at the LMU in Munich, Germany, including a one semester visit at the Sorbonne University UPMC in Paris, France, and finished his bachelor degree with a thesis on novel materials for LED phosphors. He continued his studies at the University of Hamburg, Germany, where he completed his master degree with a thesis on gold nanoparticle composite membranes for applications in micro-electromechanics and sensors. Since October 2016, he is a PhD candidate and researcher at the Institute for Physical Chemistry in Hamburg, studying the thermal destabilization mechanisms in undoped and doped zirconia micro- and nanoparticles, particularly with regard to potential applications in high-temperature photonics.

Abstract: Ceramic materials, such as zirconia, are widely used in various high temperature applications. Micro- and nanoparticles consisting of this material are promising building blocks for chemically and thermally stable photonic glasses with tailored optical properties for the employment in advanced thermal barrier coatings [1,2], thermophotovoltaics [3], and structural colorants [4]. For such specific applications, the precise control over size and shape during the particle synthesis is essential. Additionally, pure zirconia undergoes fracture and mechanical destabilization at elevated temperatures due to phase transformations and grain growth. Consequently, our work focuses on the detailed understanding of the particle synthesis and the parameters affecting size, shape and morphology of the obtained particles. Specifically, we study the potential stabilization of zirconia by doping the material with selected trivalent metals. Here, we modified existing synthesis protocols for zirconia particles based on sol-gel chemistry [5] and identified the influence of various parameters controlling particle size and morphology. In extended studies we developed procedures for the production of particles with adjustable diameters from below 100 nm up to several microns. By mixing zirconium and yttrium (also aluminum) precursors with different mixing ratios, particles with varying doping levels were obtained. Our most recent studies concentrate on the effect of the alumina concentration in zirconia microparticles on particle size and thermal stability at temperatures up to 1200 °C. We demonstrate that higher doping levels influence the particle growth conditions significantly towards smaller particle sizes. The as-synthesized particles were dried and calcinated in order to remove any organic residues from the synthesis. Multiple samples were heated to different temperatures between 600 °C and 1200 °C. The samples were characterized by ex situ TEM/EDX for qualitative comparison of the temperature stability and determination of the elemental composition as well as by ex situ XRD and Rietveld refinement for quantitative phase analysis and microstructural analysis. Our findings suggest that alumina doping of zirconia particles increases their structural integrity at temperatures above 800 °C, even with low dopant concentrations. The results of XRD phase analysis indicates an increasing stabilization of the metastable tetragonal phase against phase transition to the monoclinic polymorph. The inhibition of this microstructural change is likely to be responsible for the observed higher thermal stability.


Maik Finsel
Institute of Physical Chemistry, Germany
Title: Synthesis and Optical Properties of Monodisperse ZrO2@SiO2 Core-Shell Particles for Application as Structural Colors

Biography: Maik Finsel conducted his master thesis investigating the mechanical properties of nanoparticle composites (University of Hamburg, 2015) and spent one semester in Denmark (Southern University of Denmark, Odense, 2014) working on transition metal complexes. He gained expertise in the synthesis and characterization of doped and undoped zirconia microparticles working on his PhD project since 2015 at the University of Hamburg, Germany. He also works on the encapsulation of ceramic microparticles with silica and alumina to achieve dielectric core-shell particles for photonic high-temperature applications such as thermal barrier coatings and structural colors.

Abstract: In recent years, zirconia (ZrO2) micro- and sub-microparticles gained considerable attention due to their outstanding properties, including chemical inertness, thermal stability and high refractive index. These excellent features of zirconia-based materials enable a broad variety of applications ranging from fuel cells, catalysis, sensors to electro- and bioceramics. Furthermore, zirconia microparticles have been proposed for applications as building blocks in photonic glasses for high-temperature applications, including thermal barrier coatings (TBC)[1,2] and structural colors (SC).[3] For structural colors, well-defined monodisperse core-shell particles with smooth surface and strong refractive index contrast are needed. These requirements can be achieved by encapsulation of spherical zirconia particles with a suitable shell material. For example, to achieve the desired properties for structural colors Al2O3, SiO2, and polymers have been used to form the shell.[4,5] Most preparative methods for such core-shell particles use organic ligands (e.g. polymer[4], citric acid[5]) as adhesive layer between the core and the shell. One of the main obstacles of this approach is that it precludes high-temperature applications. Here, we developed a straightforward approach to prepare ZrO2@SiO2 core-shell composites without using additional organic coupling agents. The most striking result is that the obtained core-shell particles with diameters in the 200-500 nm range withstand temperatures up to 1000 °C whereas size-comparable zirconia particles disintegrate when heated to 800 °C as shown by XRD, SEM and cross-sectional TEM characterization. Furthermore, core-shell composites synthesized using polyvinylpyrrolidone (PVP) as interfacial coupling agent also disintegrate when heated to 800 °C, most likely due to decomposition of PVP. For applications as structural colors, a strong refractive index contrast between the core and shell materials is favorable, which is obtained by the ZrO2/SiO2 combination. We demonstrate that the position of the reflection edge in the visible wavelength range can be tuned by varying the silica shell thickness of the particles.


Dagmar Merinska
Tomas Bata University in Zlin, Czech republic
Title: PVC and PES waste/nanoclay mixtures - mechanical properties and stability

Biography: Měřínská Dagmar is Assoc. Professor, at Tomas Bata University in Zlin, Czech Republic. Her Scientific Fields of Expertise and Interests are (Nano)composite materials with polymer matrix, Polymer chemistry, Packaging materials, polymer plastics recycling.

Abstract: Mixtures of PVC and PES waste (shredded fibers) were prepared in order to crate a way how the waste of PES raster coming from hydroisolatic foils can be again used and not storaged. After the grinding of waste from mentioned foils this waste is divided into three different fractions. The first one is PES shredded material with the rest of plasticised PVC, where the amount of PVC material is so high that it can be re-worked easily and it is possible to add it into the origin mixture for the production of above mentioned hydroisolatic foils. The next second fractions obtaine significantly less of PVC material and here PVC must be added and the optimal way for their mixing into the material with required properties must be found. In order to find the way of PES waste and nanofiller synergy, the montmorillonite in one concentration was added to prepared samples of PVS/PES waste. The influence of it on the mechanical properties and stability was studied. There exist some studies about the recycling of PVC [1-3], but none about the combination of PVC and PES shredded material obtained in the form of waste. In our work all three fractions were added into two types of PVC and there were mixed on double roll equipment (to use the conditions and way as close to the practise as possible). Mechanical properties were measured on the prepared samples (bodies were cut from the rolled film) and the values of pure PVC mixture and mixtures wtih different filling of PES shredded material were observed. The same procedure was applied on the samples with nanofiller. One of results is shown in the Graph 1.


Alice Tesarikova
Tomas Bata University in Zlin, Czech Republic
Title: Preparation and Evaluation of Basic Properties of PVC/PVB/clay Nanocomposites

Biography: She studied Bachelor and Masters degree at Tomas Bata University in Zlin, Czech Republic and currently study PhD degree at the same University, Faculty of Technology, Department of Polymer Engineering. Topic of her PhD study: Multifunctional Polymer and Specialty Films Work experience: She collaborated in a team of experts to address current problems of companies involved in the project called "Nanostructured packaging materials of exceptional utility properties and easier recycling" and "The use of nanomaterials and natural extracts as functional materials in the development of active packaging materials with barrier, anti-microbial, protective and oxygen absorbing effect" She is currently working on the project "Treatment options for PES lint and other technological waste". Shi is author and co-author 5 publications of polymer nanocomposites films.

Abstract: The main aim of this study was the comparison of mechanical properties, hardness and TEM of blends of plasticized poly(vinyl chloride) (PVC) with poly(vinyl butyral) (PVB) [1, 2]. The possibility of the re-use of recycled PVB from waste of windshields was studied. Nanocomposites of PVC/PVB/clay (montmorillonite MMT), prepared by melting and mixing in a twin-screw extruder were evaluated. PVC plasticized with 38 % of diisononyl phthalate (DINP), and PVB plasticized with 28 % of triethylene glycol, bis(2-ethylhexanoate) (3GO) and recycled PVB (rec. PVB) were tested [3]. The filler as an organically modified MMT with tradenames Cloisite 93A and 30B were used. The concentration of all the above-mentioned fillers added to the polymeric matrix was 3, 5 and 7 wt. %. Blends used for the determination of basic properties of PVB/PVC mixtures in various ratio were prepared in continual BUSS extruder with two kneading chambers. Process conditions were 160 °C of temperature and rotation speed 55 rpm [4, 5]. The high PVB molecular weight can provide very high tensile strength of material. Measurement showed that fillers do not deteriorate mechanical properties and hardness of filled PVC/recycled PVB blends. The same fact was also observed for fillers in virgin PVB. As was shown by TEM analyses - the nanofiller achieves a definite degree of intercalation. The improvement of mechanical properties in scale from 60 – to 90 % of PVB was probably caused by mentioned high molecular weight of PVB (Fig. 1). Fig. 1: Mechanical properties of PVC/PVB/clay nanocomposites Further, the comparison showed that the ideal filling is 3 wt. % of fillers. This study seems to clarify a little more efficiency of PVC/PVB composites applications such as flooring, many uses in civil and automotive engineering.


Byung-Koog Jang
National Institute for Materials Science, Japan
Title: Mechanical properties and characterization of CNT and graphene reinforced ceramics composites

Biography: Dr. Byung-Koog Jang is working at National Institute for Materials Science in Japan and is researching regarding on the development of CNTs reinforced nano composites (Al2O3/CNTs, ZrO2/CNTs, HAp/CNTs), thermal barrier coatings and porous ceramics. He has been mainly taking charge of processing, sintering by spark plasma sintering & reaction bonded sintering as well as mechanical evaluation of advanced nano ceramics & composites. He is also an expert about the evaluation of the thermal conductivity of bulk materials and coatings based on the laser flash method. He received Ph.D at the University of Tokyo, Japan, 1994.

Abstract: CNT(Carbon Nanotube) have attracted great interest because of their unique structural, electronic, physical, and thermal properties, such as high electrical conductivity, thermal conductivity, and elastic modulus. It has been reported that CNT are 100 times stronger and 6 times lighter than steel. Therefore, CNT are added to metal, polymer, or ceramics to improve mechanical and thermal resistance or electrical conduction. Among these, CNT addition into engineering ceramics is expected to offer good damage and wear resistance, exhibited by the lower friction and damage absorption characteristics of carbon material. The goal of the present study is to improve the damage and wear resistance of alumina ceramics by the addition of CNT, considering only the content of CNT in the composites. The load displacement curves were influenced by the CNT content in the composites. The hardness and toughness of Al2O3-CNT nanocomposites were also affected by CNT contents, which, in turn, influenced the wear characteristics of the composites. In addition, carbon nanotube (CNT) have emerged as one of the ideal reinforcement agents due to their exceptional mechanical properties and superior thermal and electrical properties. In this work, the effect of carbon nanotube (CNT) reinforcement and the transformation toughening mechanism on the fracture toughness of 3mol% yttria-stabilized zirconia (YSZ) has been investigated. Graphene nanoplatelets (GNPs)-reinforced hydroxyapatite composites were analyzed in two directions of the applied pressure (perpendicular and parallel). Platelet-shaped pores were observed in the cross- section normal to the applied pressure, whereas elongated or buttonhole type pores around the agglomerated GNPs were found in the parallel cross-section.


Nyan-hwa Tai
National Tsing-Hua University, Taiwan
Title: Synthesis of Reduced Graphene Oxides and Its Applications for Fog Harvesting and Oil Spill Cleanup

Biography: Nyan-Hwa Tai, a Distinguished Professor of Tsing-Hua University, received his Ph.D. degree from Mechanical Engineering, University of Delaware, USA in 1990. He works for National Tsing-Hua University science 1990; his study involves processing and characterizations of nanocomposites and he focused on the syntheses and applications of graphene and graphene oxides more recently. He published over 220 scientific journal papers with over 4000 citations and a H-index of 31.

Abstract: This work demonstrates an efficient method to fabricate flexible carbon-fiber cloths (FCFC) for fog harvesting and graphene based-sponges (GS) for absorbing spilled oil. The FCFCs have both superhydrophobic and hydrophilic properties in the same face, which can be used effectively for water collection from fog. In addition, the GS with the superhydrophobic and oil-hydrophilic properties can be adopted to clean up oil spillages. In the processing of FCFCs, polydopamin (PD), titanium oxide and poly (N-isopropylacrylamide) were used and the process of the mussel adhesion protein-inspired surface chemistry was applied. The presence of carboxyl-, amino-, imino-, and phenyl- groups of the PD coating layer turns the surface into hydrophilic regardless of its original property and promote the adhesion of the substances. The FCFC exhibited excellent performance in water collection with an efficiency over 200 mg cm-2h-1. In addition, a simple dipping process was adopted for fabricating superhydrophobic and superoleophilic GS using commericial sponge as the backbone ; the synthesized GS possessed very outstanding performance for absorbing spill oil with excellent absorption capacities over 160 times their own weight.


Sanjay Krishna
Sardar Vallabhai National Institute of Technology, India
Title: Simulations of Nylon 6/Starch Nanocomposites to analyze the Mechanical behavior

Biography: Mr. Sanjay Krishna is a research scholar at the Chemical Engineering Department of Sardar Vallabhai National Institute of Technology, India. He is currently working on “Simulations of Nylon 6 based nanocomposites to study mechanical properties”. He completed his Integrated B.Tech+M.Tech from IIT Roorkee, one of the premier institutes of India, working on “Molecular Simulations of PVA based oil-repellent coatings”. He has carried out major projects which include – (1) “Genome modeling to study DNA looping” from Rice University Houston, USA, and (2) “Simulations of charge transfer through DNA” from KMUTT Bangkok, Thailand. His research interests include Modeling & Simulations, Polymer composites & blends and Biopolymers.

Abstract: Nylon-6 is a prominent polymer used in automobile and aerospace industries, known for its mechanical properties. Nylon-6 based nanocomposites are used for this very purpose. In this communication, Starch nanoparticles are used as reinforcements, as it was found to be used in enhancing the mechanical properties of composites and blends. Simulations of nylon-6 based nanocomposites were carried out with different weight proportions of starch nanofillers using Material Studio 5.5 from Accelrys. Cell models of the respective polymer matrix and nano-reinforcements were built, followed by Geometric Optimization to optimize the structure and stabilize the system and finally simulations of the nanocomposite system were carried out to calculate the mechanical properties such as Young’s Modulus, Bulk Modulus, Shear Modulus and Poisson ratio. The properties were compared with nylon 6/nano-clay nanocomposites, which shows excellent mechanical behaviour and are used in the automotive sector. The main idea is to inculcate a natural, renewable, non-degradable and easily-available biopolymer that provides good mechanical properties to nanocomposites which are comparable with current advanced materials.


Artur Feld
Hamburg University, Germany
Title: Self-assembled iron oxide/oleic acid -based nanocomposite with exceptional isotropic mechanical properties

Biography: Artur Feld is a postdoctoral fellow at the University of Hamburg in the workgroup of Prof. Dr. Horst Weller. Artur earned a bachelor of science, master of science and a doctorate in chemistry from the University of Hamburg with the main topics nanocomposites and nanohybrids. He works in the department of physical chemistry and “The Hamburg Centre for Ultrafast Imaging” and focuses on the size and shape controlled synthesis of iron oxide nanoparticles and especially on mechanisms of nucleation and growth of iron oxide nanoparticles in solution.

Abstract: Inspired by nature one of the most promising and challenging approaches is to synthesize nanocomposites, which consist of a combination of soft organic and hard ceramic materials.1–3 Iron oxide such as magnetite is very suitable for the synthesis of nanocomposite, because magnetite nanoparticles are extensively studied regarding their size and shape controlled synthesis and also nature makes use of iron oxide as an ultra-hard material in chiton radular teeth.4 Usually, it was only possible to achieve good mechanical strength with high aspect ratio layered structures of minerals. Approaches with the use of monodispersed nanoparticle supercrystals results in weak mechanical properties in these composites. We present the successful manufacturing of a nanocomposite consisting of oleic acid coated spherical iron oxide nanoparticle with exceptional isotropic mechanical properties.5 We developed a concept to link iron oxide nanoparticles in a well-ordered superstructure by oleic acid molecules during a thermal process. The synthesis process is divided into four stages: sedimentation, drying, pressing and heat treatment. Whereby, the crosslinking of the oleic acid molecules by their double bond is initiated by thermal annealing up to temperatures of 350 °C. The exceptional mechanical properties - bending modulus of 114GPa, hardness of up to 4GPa and strength of up to 630MPa - are dominated by the covalent backbone of the linked organic molecules. To our knowledge these are the highest combined values of elastic modulus, strength and nanohardness ever reported for a synthetic bioinspired organic/inorganic nanocomposite.


Maher S. Amer
Wright State University, USA
Title: Gigantic Challenges, Nano-Solutions

Biography: Dr. Amer is Professor of Materials Science and Engineering, a senior von Humboldt Fellow, Max Planck Society, Germany, and a former Visiting Fellow of the Fitzwilliam College, University of Cambridge, England. Dr. Amer is a member of a number of national and international committees focused on nanomanufacturing and higher education accreditation. He received his Ph.D. from Drexel University 1995.

Abstract: As we are rapidly approaching year 2050 and the population capacity of planet Earth, it becomes a must to, sooner better than later, face our gigantic challenges. It is widely known that our global stability is seriously threatened by the consequences of our depleting energy and clean water resources. Extensive scientific research over the past 15 years has shown that Nano-technology-based solutions hold promising answers to our pressing needs. However, It is very important to understand the thermodynamic fundamentals governing the structure and performance of such thermodynamic small systems especially their ability to selectively interact with certain chemical moieties and with electromagnetic radiation. Understanding such fundamentals will definitely lead to unique solutions for our pressing challenges. Nanostructured films and membranes engineered to selectively adsorb unwanted chemical, and biological species can provide a valuable solution for water treatment, desalination, and can definitely contribute to the world’s water and environmental challenge. In addition, photovoltaics batteries based on nanostructured fullerene films are also a very promising rout to explore when addressing energy challenges. In this talk, we will discuss both experimental and molecular simulation fundamental work, done in our research group, as related to Energy and water challenges. Biography:


Antoine Rodolphe
Universite´ de Lyon, France
Title: Two-photon absorption of ligand-protected Ag15 nanoclusters. Towards a new class of nonlinear optics nanomaterials

Biography:

Abstract: We report theoretical and experimental results on two-photon absorption (TPA) cross section of thiolated small silver cluster Ag15L11 exhibiting extraordinary large TPA in red. Our findings provide the responsible mechanism and allow proposing new classes of nanoclusters with large TPAs which are promising for biological and medical applications. Ligand protected noble metal clusters in the size regime smaller than B1 nm exhibit remarkable quantum size effects.1 In particular, their nonlinear optical (NLO) properties show extraordinary trends in the non-scalable size regime where each atom counts.2–4 For instance, the two-photon absorption cross section for Au25 in hexane is 427 000 GM at 800 nm, a value significantly larger than the typical value of approximately 1000 GM for organic macromolecules.5 Also, it has been reported that water-soluble ssDNA-encapsulated Ag clusters exhibit large twophoton cross sections reaching 50 000 GM with high quantum yields in the red and near-IR part of the optical spectrum.6 In spite of this, the elucidation of the fundamental photophysical mechanisms underlying two photon excited light emission from ligated nanoclusters with few noble metal atoms still requires an in-depth understanding of the structural and electronic interplay between the metallic and ligated parts of the clusters. The determination of the clusters structural properties is therefore the first step needed for the interpretation of the NLO experimental results. Structural properties for several ligated nanoclusters, mainly containing gold atoms, have thus been determined by single crystal X-ray crystallography.7 Ligated clusters with 25 gold atoms have recently been reported to exhibit large two-photon absorption (TPA).4,5 For such thiolated gold clusters [Au25(SH)18]1, which structure is known from crystallographic data,8,9 TDDFT calculations have been used10 to explain the large TPA cross sections that have been experimentally reported by Goodson and coworkers.5 Calculated TPA cross sections within the three-states approximation were explained by resonance effects between one- and two-photon transitions. Besides, their values were shown to be strongly dependent on the choice of the X–C functional. Recently, onephoton absorption (OPA) properties of the smaller glutathione silver clusters (Ag15(SG)11)11 as well as the OPA and the NLO properties of the 15 gold atoms clusters (Au15SG13)7,11,12 exhibiting remarkable optical properties have been found. Two-photon absorption theory has been developed long time ago13 but calculation of nonlinear properties of systems involving silver and gold subunits are more recent.10,14,15 In this communication, we report TDDFT determined NLO properties of Ag15L11 (L = SH) with four confined electrons in the Ag8 core. For this system, large fluorescence following OPA has been measured. Due to resonance effects, huge TPA cross sections in the red part of the spectrum are calculated while moderate TPA cross sections in the near-IR are predicted. This observation is in reasonable agreement with the measured TPA cross sections for the Ag15(SG)11 clusters, which are available in the range of 750–800 nm. The two-photon absorption cross section for an excitation from the ground state |0i to a final state |fi is related to TPA transition probability for which the transition amplitude tensor has to be determined. For this purpose, we apply the quadratic response density functional theory QR-DFT using either single residue (SR) analytical formulation or via sum over states (SOS) method for which transition dipole moments are calculated within double residue QR method as described in Computational part, both in the framework of the DALTON quantum chemistry program.19


Basavaraj Madhusudhan
Davangere University, India
Title: Noninvasive Imaging vulnerable atherosclerotic plaques: Regression by nanoscale lignans

Biography: Dr. Madhusudhan, Davangere University, holds M.Sc. and PhD in Biochemistry from University of Mysore-Central Food Technological Research Institute, India. He has served the University of Mysore during 1982 and 1998 as Sr. Lecturer in Chemistry on permanent basis. While in staying in abroad (1996 - 2004), he has worked as Postdoctoral Scientist with Prof. Vic Morris, Institute of Food Research, Norwich, UK; as Research Associate with Prof. Paul Seib, Kansas State University, Manhattan, Kansas, USA; Sr. Research Associate with Prof. Dennis Wiesenborn at the North Dakota State University, Fargo, USA; Visiting Scientist with Prof. DC Gowda at the Penn State University College of Medicine, Hershey, USA, and with Prof Paul Rope at the Georgetown University Medical Center, Washington D.C, USA.

Abstract: Atherosclerosis is an inflammatory disease complicated by progressively increasing atherosclerotic plaques in the arterial walls. The life- threatening syndrome adversely affects the arterial blood vessels in response to chronic inflammatory signaling of white blood cells in the walls of arteries to form multiple atheromatous plaques. To date, several methods of identification of high-risk atherosclerotic invasive and noninvasive plaque imaging modalities and biomarkers in high-risk patients is warranted. Intracoronary imaging strategies for confirmation of plaque existence and characteristics are detectable in humans. More recently, computed tomography (CT) or electron beam tomography (EBT) and gray-scale intravascular ultrasound (IVUS) imaging are used to visualize the external elastic lamina of the vessel wall to determine the vessel size, plaque components and morphology in comparison to angiography. Further, the beneficial effects of radiofrequency (RF) analysis of the ultrasonic signal (RF-IVUS) would be helpful to distinguish the nature of composition among fibrotic plaque and fibro-calcific plaque of thick-cap fibro-atheroma (TCFA) in vulnerable plaques of atherosclerosis. Akin to pharmaceuticals, functional foods can also be used to prevent and treat cardiovascular diseases. Recently, the beneficial effects flaxseed lignans on the regression of atherosclerotic plaques or the resolution of cholesterol-induced vascular contractile dysfunction at the nanoscale level has been investigated will be discussed.


Rafael Popper
VTT Technical Research Centre of Finland Ltd, Finland
Title: CASI-F applied to critical issue analysis and assessment of Li-ion battery technology solutions

Biography: Rafael Popper (PhD) is Principal Scientist in Foresight, Organizational Dynamics and Systemic Change at VTT Technical Research Centre of Finland, and Research Fellow at the Manchester Institute of Innovation Research of the University of Manchester. He is Director of Executive Education in Foresight and Horizon Scanning at the Alliance Manchester Business School, and Innovation Director and CEO of Futures Diamond Ltd (UK and Czech Republic). He has also worked at United Nations Industrial Development Organisation (UNIDO) and as consultant for the European Commission, World Bank and other international, governmental and business organisations in Europe, Latin America, Africa, Asia and Australia.

Abstract: We apply CASI-F (Common Framework for the Assessment and Management of Sustainable Innovation) to analyse critical issues that influence the uptake of nanotechnologies in battery technologies. Due to climate change as well as the growing capacity of new storage media for electric power, electric mobility represents a future vision for individual mobility on an environmentally-friendly basis. The lithium-ion battery is considered the key technology for future (electric) engine systems. However, lithium-ion battery technology could be considered to be at the peak of technical enhancement. A number of researchers are trying to shift away from conventional Li-ion battery technology and implement nanotechnology to other energy storage devices in order to make them more cost competitive and influence superior performance as compared to Li-ion batteries. A careful analysis and evaluation of the advantages and disadvantages of these approaches is therefore indispensable. Besides technological aspects, CASI-F includes wider market and ecosystem development considerations, i.e. economic, environmental, social, government and infrastructure systems. Since the product market is influenced by changing socio-technical system conditions at the niche, regime and landscape levels, we need to evaluate the development of broader issues, e.g. regulation and legislation, norms and standards as well as infrastructure and user acceptance. For example, one can expect that recyclability and sustainability will play an ever increasing role in electric mobility solutions. Aspects of all these areas play a huge role in market development.


Mika Naumanen
VTT Technical Research Centre of Finland Ltd, Business, Finland
Title: CASI-F applied to critical issue analysis and assessment of Li-ion battery technology solutions

Biography: Mika Naumanen (MSc Tech, MSc Econ) is a senior scientist in the Innovation and Knowledge Economy group of VTT. He has run VTT’s “business from technology” program and managed a portfolio of business development projects in the fields of Industrial Systems Management, Services and Built Environment, ICT and Electronics. These activities include monitoring and forecasting technology development paths as well as developing indicators and providing analysis of how these projects meet the national research and innovation policy objectives. Naumanen is a visiting scholar in Statistics Finland also.

Abstract: We apply CASI-F (Common Framework for the Assessment and Management of Sustainable Innovation) to analyse critical issues that influence the uptake of nanotechnologies in battery technologies. Due to climate change as well as the growing capacity of new storage media for electric power, electric mobility represents a future vision for individual mobility on an environmentally-friendly basis. The lithium-ion battery is considered the key technology for future (electric) engine systems. However, lithium-ion battery technology could be considered to be at the peak of technical enhancement. A number of researchers are trying to shift away from conventional Li-ion battery technology and implement nanotechnology to other energy storage devices in order to make them more cost competitive and influence superior performance as compared to Li-ion batteries. A careful analysis and evaluation of the advantages and disadvantages of these approaches is therefore indispensable. Besides technological aspects, CASI-F includes wider market and ecosystem development considerations, i.e. economic, environmental, social, government and infrastructure systems. Since the product market is influenced by changing socio-technical system conditions at the niche, regime and landscape levels, we need to evaluate the development of broader issues, e.g. regulation and legislation, norms and standards as well as infrastructure and user acceptance. For example, one can expect that recyclability and sustainability will play an ever increasing role in electric mobility solutions. Aspects of all these areas play a huge role in market development.


Jang-Ung Park
Ulsan National Institute of Science and Technology (UNIST), Republic of Korea
Title: Wearable electronic devices using graphene and its hybrid nanostructures

Biography: Jang-Ung Park achieved his Ph.D. from University of Illinois at Urbana-Champaign (UIUC) in 2009. After that, he went on to work as Postdoctoral Fellow at Harvard University. He is now an Associate Professor in School of Materials Science and Engineering at UNIST. His current research is focused on nanomaterials synthesis and wearable electronics.

Abstract: Recently, wearable electronics detecting the physiological change for the diagnosis of disease have attracted extensive interests globally. Among them, contact lens is one of the most attractive candidate for the continuous and wireless health monitoring. To realize these personal see-through, devices all device components are required to be transparent and stretchable in order to be integrated into the multiplexed sensor system including wearable soft contact lenses. However, the transparent and stretchable sensors integrated on the biomaterials are not yet been realized. In this talk, we presented an unconventional approach to form transparent, flexible and sensitive multiplexed sensors for diagnosing diabetes and glaucoma based on hybrid nanostructures using one-dimensional metal nanowires and two-dimensional graphene. Additionally, the entirely integrated sensors on the contact lens are designed to be R (resistance) L (inductance) C (capacitance) structure operating via radio frequency for wireless and real-time sensing. In this respect, power sources, associated circuitry, and interconnect electrodes are not required in this system. We further present real-time in-vivo glucose monitoring in rabbit and ex-vivo intraocular pressure sensing in bovine eyeballs wirelessly for applications in wearable electronics. The advance of these electronics using hybrid structures provides a route towards future electronics.


Akshay Chandrakant Dhayagude
Savitribai Phule Pune University, India
Title: Effect of electrolytic media on the photophysical properties and photocatalytic activity of zinc oxide nanoparticles synthesized by simple electrochemical method

Biography: Mr. Akshay Dhayagude received his M.Sc. degree in Chemistry with specialization in Physical Chemistry from Savitribai Phule Pune University, Pune, in 2010. He is currently Senior Research Fellow at Department of Chemistry, S. P. Pune University Pune. He is pursuing his Ph. D. degree in the subject entitled. “Synthesis, Mechanistic and Surface Modification Studies of Zinc Oxide, Silver and Gold Nanoparticles”.

Abstract: Mesoporous zinc oxide (ZnO) nanoparticles (NPs) were successfully synthesized by simple electrochemical method using tetrabutyl ammonium bromide (TBAB) as a stabilizer in different polar protic solvents viz. water, ethanol and their mixture. XRD and Raman scattering analysis indicate the formation of pure hexagonal phase ZnO in pure ethanol as well as in water-ethanol mixture, while synthesis in pure water gives mixture of hexagonal ZnO and orthorhombic Zn(OH)2. Field emission scanning electron microscopy (FE-SEM) micrographs show that ethanol as an electrolytic medium yields globular cluster of nanospheres, while involvement of water as an electrolyte gives spindle shaped cluster of quasi-spherical NPs. Band gap value of the ZnO NPs synthesized in ethanol was found to be higher, (3.65 eV) than those synthesized in water-ethanol mixture (3.50 eV) and pure water (3.35 eV). Significant enhancement in surface area was also observed with variation in the reaction medium from aqueous (45 m2g-1) to alcoholic (160 m2g-1). Sample synthesized in ethanol hence showed highest photo-degradation of methylene blue (MB) dye. The rate constant value for this sample was higher (0.0793 min-1) than the values for sample synthesized in water-ethanol mixture (0.0242 min-1) and pure water (0.0139 min-1). The possible mechanism of formation of ZnO NPs as well as degradation of MB is proposed.


David Barba
Énergie, Matériaux et Télécommunications, Canada
Title: Synthesis of Ge and Er nanoclusters with superior resistance in harsh environments

Biography:

Abstract: The operability and durability of erbium and germanium doped fused silica components in harsh environments are limited by thermal diffusion, responsible for structural changes that induce irreversible material degradation and failure. An alternative solution for improving both the thermal and the radiation resistance of these compounds consists of synthesizing Si-, Ge- and Er-based nanoclusters. This technique enables to control atom diffusion, using chemical trapping effects induced by silicon dangling bonds and the pinning of nanoaggregates by silicon nanoparticles during high temperature annealing. Our experimental approach and methodology combine the fabrication of advanced materials by the use of single or multiple ion implantations, with subsequent advanced characterizations by Raman/photoluminescence spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and nuclear analysis. Our work shed light on the nucleation processes of group-IV nanocrystallites, as well as on the formation of nanocavities in Ge-based materials. The nanoclustering of mixed Si/Er and Si/Ge materials is also found to extend the lifetime of near infrared Er light sources exposed to cosmic radiations, and prevent Ge desorption, more than several hundred degrees above heating conditions where drastic outgassing effects occur. High resolution imaging supported by Monte-Carlo simulations and Rutherford Backscattering Spectroscopy measurements shows how the size, the homogeneity, the depth-distribution, as well as the composition and the crystallinity of the formed nanoclusters can be set as a function of the fabrication parameters, in order to design components with specific properties and superior resistance.


K. Yu. Zershchikov
Сonstanta-2 LLC, Russia
Title: How disperse filler particles affect the physics and mechanics of polymer composites

Biography: Born 2 December, 1961 in Volgograd, Russia. In 1984, graduated from Volgograd Technical University as a mechanical engineer, started his carrier at a structural steel plant as a manager and was promoted to production supervisor. In 1989, started teaching at Volgograd Technical University, in 1993 defended the Candidate of Technical Sciences thesis titled ‘Residual stresses in metal-polymer composites’. Since 1993, heads the company Сonstanta-2 LLC that develops novel composites and fabricates polymer and composite seals.

Abstract: A method has been developed to calculate the filler interparticle spacing and the matrix to filler contact area taking into account the filler’s properties, namely the size and shape of particles and the volume fraction in the matrix. Assuming that the properties of polymer composites containing hard inelastic filler particles depend on the polymer’s behaviour in the interparticle spaces, the effect of the filler’s properties on some physical and mechanical composite parameters has been studied. The studies examined how the filler’s shape, size and quantity affect the strength, elongation at break, shrinkage and linear expansion coefficient. Experimental testing of the assumptions has shown good repeatability of the calculation results.


Babita S
Annamalai University, India
Title: A novel lovastatin formulation for improving oral bioavailability

Biography: Ms.Sarangi is currently pursuing Ph.D at Annamalai University under the guidance of Dr.Guru Prasad Mohanta. She is a post graduate in M.Pharm from Dibrugarh University, Dibrugarh with Pharmaceutics as the core area of specialization. She is doing her research work on Nanoparticulate Drug Delivery System. Her research interest includes development and evaluation of Novel Drug Delivery System and Clinical Pharmacokinetics.

Abstract: Lovastatin, a highly lipophilic drug is associated with poor oral bioavailability belongs to the class of cholesterol lowering drugs. This work is an attempt to improve oral bioavailability of lovastatin through formulation as solid lipid nanoparticles (SLNs). Lovastatin was encapsulated into SLNs prepared by pre-emulsion and probesonication method employing trimyristin as lipid carrier, poloxamer 407 as surfactant and soyalecithine as emulsifier. SLNs formulations were optimized using central composite design. The responses of the design were analyzed using design expert software 8.0.7.1 (state ease inc., usa) and evaluated for independent variables. Based upon software analysis the SLNs formulations were optimized. The particle size and zeta potential of optimized formulation were measured by dynamic light scattering technique and were found to be 348.8±35.5 nm and -18.6 mV respectively. The entrapment efficiency was found to be 84.06±0.15%. The shape and surface topography of lyophilized SLNs were observed by scanning electron microscopy (SEM) and found spherical in shape. The drug release study was performed using dialysis bag diffusion technique and cumulative drug release showed up to 72 % in 24 h. In vitro drug release studies confirmed the sustained release nature of the formulation. The optimized SLNs showed no physical changes at refrigerated and room temperature for 90 days. Results from this study suggest that SLN is a promising colloidal system which could significantly improve the bioavailability of lovastatin by improving the solubility.


Xiaojing Wang
Inner Mongolia University, China
Title: Design of photocatalyst based on the niobium and tantalum nano-materials and its application in remediating water environment contaminates

Biography: Xiaojing Wang, Born in 1963, Professor. She received her Ph.D from Department of Material Chemistry, Tohoku University of Japan at 2003. Since 2004, she got a scholastic profession in Inner Mongolia University of China as a Professor. Her main research interests include the design and preparation of nanomaterials, the photocatalysis and its application in environment pollution.

Abstract: Nitrobenzenes derivatives (NB) are extremely harmful to human and environment while the reduced product of them, aminobenzene derivatives exhibit low toxicity and better biodegradability. Moreover, aniline compounds are usually used as a number of important reactions intermediate in organic chemistry manufacturing such as the production of dyes, pharmaceuticals and agricultural chemicals. So it is very meaningful to reduce nitrobenzenes derivatives to the corresponding anilines. From the viewpoint of unprecedented practical applications, it is highly necessary to explore noble-metal-free and highly active catalysts and comprehend the underlying chemistry and physics. This work will report on the preparation of a series of noble-metal-free and highly active catalysts based on niobium and/or tantalum nanomaterials toward to the reduction of nitrobenzenes, such as TaOxNy, Ca2Nb2O7, NiNb2O6, and CeO2@Ag/Ag2Ta4O11. We found that nitridation of a silent Ta2O5 substrate led to the formation of a series of TaOxNy hollow nanocrystals which exhibited outstanding activity toward catalytic reduction of nitrobenzenes under ambient conditions. We also reported the work NiNb2O6 nanoparticles which showed superior catalytic activity and stability toward reduction of 4-nitrophenol due to a unique photo-synergistic catalytic mechanism that relies on a synergy between thermal active sites and photogenerated electrons in NiNb2O6 nanoparticles. We assembled a novel catalyst CeO2@Ag/Ag2Ta4O11 via an in-situ catalytic process toward 4-nitrophenol reduction. The results showed the elementary substance Ag was produced from Ag2Ta4O11 after the circular reduction reaction and homogeneously deposited on the surface of Ag2Ta4O11 nanoparticles, which was wrapped by octahedron-shaped CeO2. The as-prepared nanocomposites exhibited extremely accelerated catalytic activity toward the efficient reduction of 4-nitrophenol compared to pure CeO2 and Ag2Ta4O11 nanoparticles. Our researches proved that tantalante (or niobium) nano-materials were very effective photo-catalysts for the redox of nitrobenzenes due to their higher band potential and wide band gap. The underlying mechanism is completely different from those previously reported for metallic NPs. The band gap (light absorption) and catalytic activities can be regulated via doping which can produce the impurity band and defects. This work may provide new possibilities for the development of novel catalytic systems including many electron transfer reactions.


Bal Chandra Yadav
Babasaheb Bhimrao Ambedkar University, India
Title: Nanostructured metal oxide in polymer matrix for the detections of NO2 and Liquefied Petroleum Gases in open environment

Biography:

Abstract: Present work will include the research carried out on various nanostructured metal oxides such as ZnO, SnO2, TiO2 etc. and their composites with polymeric materials like PANI, PEG, PVA, polypyrrole etc. As special case I will discuss the preparation of ZnO thin film, polyaniline (PANI) and PANI-ZnO and their applications as NO2 gas sensor. Pt-doped SnO2 thin film based sensor was found to give maximum sensing response of about 183 towards low concentration of (20 ppm) of NO2 gas at the temperature of 90˚C with very fast response (~ 6 sec) and recovery (~ 13 sec) time. Amongst all the prepared sensor structures, the SnO2-ZnO (ZSO) sensor structure showed a high sensing response of about 1578 towards 20 ppm of NO2 gas at a lower operating temperature of 70˚C with an average response and recovery time of 3.91 min. and 6.91 min. respectively. These results as the film properties and sensing performances have been discussed in terms of a space-charge layer formed on the columnar grains. Also Liquefied Petroleum Gas sensing through above said investigated materials and other metallo polymers would be discussed.


M. Shaheer Akhtar
Chonbuk National University, Republic of Korea
Title: Rapid Synthesis of Mesoporous Mn2O3 nanoparticles for Electrochemical Supercapacitors

Biography: Professor M. Shaheer Akhtar completed his Ph.D. in Chemical Engineering, 2008, from Chonbuk National University, South Korea. Presently, he is working as full time Associate Professor at Chonbuk National University, South Korea. His research interest constitutes the photoelectrochemical characterizations of thin film semiconductor nanomaterials, composite materials, polymer based solid-state films, solid polymer electrolytes and electrode materials for dye-sensitized solar cells (DSSCs), hybrid organic-inorganic perovskite solar cells, organic solar cells, energy storage applications and photocatalytic reactions.

Abstract: Manganese oxides (MnOx) are a class of transition metal oxides, can assume multiple oxidation states and diverse phases during oxidation and reduction processes [1]. Among various MnOx, Mn2O3 nanomaterials exhibit a high surface area, narrow pore size distribution, large pore volume, and high thermal stability. In recent year, MnOx materials are promising candidates for active electrode materials for various electrochemical systems like fuel cells, supercapacitors etc., due to their high specific capacitance, low cost, abundance and environmentally benign nature [1]. However, the electrochemical performances are still limited due to the low electrical conductivity, low rate capability, and suboptimal structural stability of MnOx [2-3]. In this work, the mesoporous Mn2O3 nanoparticles (NPs) were synthesized by manganese acetate, citric acid and sodium hydroxide through hydrothermal process at 150 oC for 3h. The synthesized mesoporous Mn2O3 NPs were characterized in terms of their morphology, surface, crystalline, electrochemical and electrochemical properties. Mesoporous Mn2O3 NPs based electrode possessed the excellent electrocatalytic activity by observing good electrochemical properties in 6M KOH. The fabricated supercapacitors showed the excellent specific capacitance (Csp) of 460 Fg−1 and good cycling stability after 5000 cycles. The enhanced capacitance might be explained by the facts in improving the surface area, porous surface and uniformity, which might favor the fast ionic transport over the good electrocatalytic surface of the Mn2O3 electrode.


Marikah David
Jomo Kenyatta University of Agriculture and Technology, Kenya
Title: Novel Materials from Clay and Functionalized Clay Nanoparticles: Application in Remediation of Lead, Cadmium and Pentachlorophenol from Water

Biography:

Abstract: The importance of water purification especially removal of both organic and inorganic contaminants cannot be overemphasized, hence the need to develop water purification materials that are cheap, easily available and efficient. This would ensure realization of the Clean Water and Sanitation Sustainable Development Goal (SDGs). The current study involves isolation of clay nanoparticles (CNP) and functionalizing them with Cetylpyridinium Chloride (CPC) and Tetradecyltrimethylammonium Bromide (TTAB) to form C-CPC and C-TTAB respectively, so as to increase efficiency in removal of lead, cadmium and pentachlorophenol (PCP) through batch process. Clay was acquired locally, purified and CNP isolated by sedimentation and centrifugation. The CNP, C-CPC and C-TTAB were characterized using Fourier Transform Infra-Red (FTIR) spectroscopy, X-Ray Diffractometry (XRD), Scanning Electron Microscopy (SEM) and High Resolution Transmission Electron Microscopy (HRTEM). HRTEM revealed a particle size of 12-15 nm for the three adsorbents. CNP had a lead removal efficiency of 88% at initial concentration of 80 ppm and 94% for Cadmium at initial concentration of 50 ppm, while C-CPC and C-TTAB had lead removal efficiencies of 98%. For cadmium removal, C-CPC and C-TTAB had 98.2% and 98.6% efficiencies respectively. In pentachlorophenol (PCP) adsorption, CNP, C-CPC and C-TTAB had removal efficiencies of 85.6%, 87.7% and 84.6% respectively. The findings suggest that isolation of CNP and consequent modification with the surfactants increases adsorption efficiency of clay against the water pollutants.


Majed Aminia
Sharif University of Technology, Iran
Title: Preparation and Characterization of PVDF/Starch Nanocomposite Nanofibers Using Electrospinning Method

Biography:

Abstract: In this study, Poly (vinylidene fluoride) PVDF and Starch nanocomposite nanofibers with potential for tissue engineering purposes have been reported for the first time. Mats nanofibers were formed by the electrospinning of the PVDF solution, Starch and blend of the mentioned solutions. Characteristics of PVDF, Starch and PVDF/Starch nanofiber mats were examined using rheometric mechanical spectroscopy (RMS), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FE-SEM) and differential scanning calorimetry (DSC) analysis. The present study also provides the results of the mentioned analyses with respect to different mixtures of PVDF and Starch polymer.


Mohammad Yeganeh Ghotbi
Malayer University, Iran
Title: Layered nanoreactors, precursors to produce metal/N- and N-doped graphene-like carbon materials for use in polymer electrolyte fuel cells and supercapacitors

Biography: Mohammad Yeganeh Ghotbi is an Assoc. Prof. at Materials Engineering Department, Faculty of Engineering, Malayer University, Malayer, Iran. He has gained a PhD in “Nanomaterials and Nanotechnology” in 2009 from Universiti Putra Malaysia (UPM). He teaches some courses such as Advanced materials, Polymers, Thermodynamics of materials and Materials characterization for both undergraduate and master students. His research fields are Layered hydroxides, Carbon, Polymer electrolyte fuel cell and Supercapacitors.

Abstract: It is well known that the production of highly efficient non-precious metal catalysts (NPMCs) would result in solving the issues faced with the use of the expensive and rare noble metals of Pt and Pd as the electrocatalysts for the oxygen reduction reaction (ORR) in polymer electrolyte fuel cell cathodes. The most general NPMCs are obtained as nitrogen or metal/nitrogen-doped carbon catalysts. So far, the researchers have synthesized the carbon catalysts by heat-treatment process of the organic compounds comprising the nitrogen element and also transition metals. If the compounds did not have the transition metals, an impregnation process by using the metal salt solutions would carry out before or after the heat-treatment of the organic compounds. In this research, we show that how an organic-inorganic layered nanoreactor can be used to produce nitrogen and metal/nitrogen doped graphene-like carbon materials to be used in polymer electrolyte fuel cell (PEFC) cathodes and also in supercapacitors as the active materials. Our graphene-like carbon materials show high porosity with well sized pore diameters and high surface areas, high and tunable nitrogen content with well dispersity of the dopants within carbon structure.


Abdur Rauf
University of Swabi Anbar, Pakistan
Title: Green Synthesis of Silver Nanoparticles Capped with Root Extracts of Rhus javanica and Their Biomedicinal Applications

Biography: Dr. Abdur Rauf has completed his PhD in 2015 from Institute of Chemical Sciences University of Peshawar, KPK, Pakistan. Currently, he is the Head Department of Chemistry University of Swabi Anbar, KPK, Pakistan. His field of specialization is Medicinal Chemistry; Pharmacology, Green synthesis of nanoparticles and molecular docking of bioactive compounds. He has published more than 130 scientific articles in reputed journals (>130 impact factor). He is serving as an editorial board member of 12 international journals. His articles got 632 citations as per Google scholar report. He has H-index 13 and i10 index 22 (Google scholar).

Abstract: Designing chemical products and coming up with new processes which either eliminate or reduce the production of environmental unfriendly substances is termed as Green Chemistry. This study deals with facile green synthesis of environmentally harmless silver nanoparticles (Ag-NPs) capped with root extracts of Rhus javanica. Synthesized silver nanoparticles (Ag-NPs were characterized by using Uv-visible, Fourier transform (FT-IR) spectroscopy and AFM (atomic force microscope) analysis. Moreover, phytochemical analysis of R. javanica root extracts indicated the presence of various active classes of compounds such as tannins, reducing sugars, saponines, terpenoids, alkaloids, flavonoids, coumarins, betacyanins. These secondary metabolites could be the potential ligands in the green synthesis of silver nanoparticles (Ag-NPs). In addition, synthesized Ag-NPs and the methanolic extracts of R. javanica were screened for their in-vitro and in-vivo antimicrobial, anti-nociceptive, muscle relaxant and sedative potentials. Ag-NPs showed excellent antimicrobial, anti-nociceptive, muscle relaxant and sedative potentials. It is concluded that the roots extracts of R. javanica is an excellent bioreducant for the rapid and green synthesis of Ag-NPs, which in turn showed various biomedicinal activities.


Mubarak A Khan
Institute of Radiation and Polymer Technology Bangladesh Atomic Energy Commission, Bangladesh
Title: Jute Cellulose Based Biodegradable Packaging Material: Towards Commercialization

Biography:

Abstract: Carboxymethyl Cellulose was prepared from jute fiber originated cellulose and polymer blend was formulated with polyvinyl alcohol (PVA), crosslinker and glycerol as a plasticizer. The formulated solution was subjected to solution casting for preparing biodegradable sheets for packaging purposes. Physical, chemical and morphological properties of the developed biodegradable packaging were characterized by the means of mechanical properties testing like tensile strength (TS) and elongation at break(Eb), water uptake, solubility in water, moisture absorption, X-ray Diffraction (XRD) study, X-ray photoelectron spectroscopy (XPS), contact angle study, thermal properties analysis, transparency, FTIR study as well as various microscopic studies i.e. scanning electron microscopic (SEM) study, transmission electron microscopic (TEM) study, atomic forced microscopic study, optical microscopic study. Biodegradation of the blend film was studied by soil burial test. The ratio of CMC and PVA in the blend films was optimized on the basis of their mechanical and physicochemical properties. The highest TS and Eb of the cross- linked films were recorded 22.11 MPa and 72.2% respectively. Water uptake, moisture uptake, water solubility and contact angel studies suggested increased hydrophobicity of the blend sheet with respect to the crosslinking catalyzed by acid. FTIR and XPS studies showed the shifting of binding energy due to formation of ester bond. Differential Scanning Calorimetry (DSC-TG) studies showed increased thermal properties due to the esterification. Microscopic studies revealed the distribution of cellulose micro and nano fiber throughout the blend sheet. However, the fiber was not found evenly dispersed. Biodegradation studies revealed that the developed sample undergoes biodegradation within three to four months. Moreover the sample showed similar transparency compared to the polyethylene sheet. Considering these tests and characterization it has become evident that the optimized blend film will be very suitable as a low cost, environment friendly biodegradable packaging material.


Nanomaterials Fabrication, Characterization and Tools

Session Introduction

Ashwani Sharma
M.D.U. Rohtak, India
Title: Effect of doping on particle size of CuO

Biography:

Abstract: Nano materials have wide range of applications due to their interesting size-dependent chemical and physical properties compared to particles of size in the range of micrometer. Metal oxide nanoparticles are very usefull in field of sensing, optoelectronics, catalysis and solar cells due to their unique physical and chemical properties differing from bulk. copper oxide nanomaterials have attracted more attention due to its unique properties. . Cu2O (Cuprous oxide) and CuO (Cupric Oxide) are two important oxide compounds of copper. Cuprous oxide is p-type direct band gap semiconductor with band gap of 2 eV and Cupric oxide has a monoclinic structure and presents p-type semiconductor behavior with a Indirect band gap of 1.21–1.51 eV. They have lower surface potential barrier than that of metals, which affects electron field emission properties. (1-7)Strontium Oxide is a highly insoluble thermally stable source suitable for glass, optic and ceramic applications. Strontium oxide is a strongly basic, colorless oxide that forms elemental strontium when heated with aluminum in a vacuum. Here an attempt is made to synthesis (Srx Cu1-xO) nanoparticles by sol–gel method. Five samples were prepared by changing concentration of strontium and their XRD is studied comparatively We see that as we increase the concentration of strontium , the size of nanoparticles increase which is obvious as radius of strontium atom are bigger then copper atom.


Pietro Santagati
Amec Foster Wheeler, UK
Title: Computational Science and Nanotechnology in Strategic Energy Sectors

Biography: Dr. Pietro Santagati(Ph.D. in Mathematics for Technology), now is Computational Scientist, and Parallel Architecture Specialist, at Amec Foster Wheeler, Clean Energy Europe. He got his M.Sc. in Aerospace and Aeronautics Engineering at Polytechnic of Turin, M.Sc. in Applied Mathematics and Ph.D. in Mathematics for Technology at University of Catania. He has been working in different fields of applied engineering in particular, transport process in nano- and micro-structred materials and reliability analysis in nano-electronics. Currently he is involved in projects on computational applications of modern energy production systems.

Abstract: Nanotechnology and modern Computational Science play a key role in the energy sector. In the last decades energy demand has risen dramatically. New material, in terms of efficiency and reliability, have been studied and improved. Industry has an important role, not only in prototyping new devices, but also making their development and introduction in the market, on large scale, in sustainably way possible. This presentation focuses on the analysis of the impact of Nanotechnology in strategic energy sectors: nuclear, solar, storage. We will give also some results about recent studies, by mathematical and numerical modeling, of plasmonics technology.


Haythem Suliman Basheer
University of Bahri Collegeof Applied and Industrial Sciences, Sudan
Title: Zinc Oxide Synthesis Using Wet Chemical Growth with various Nanostructures

Biography: Haythem Suliman has completed his M.Sc from Sudan Academy of Sciences University in nanomaterials and he has expertise in teaching undergraduate epcially in chemistry lab also he participate in national conference.

Abstract: Zinc Oxide nanostructures (NSs) formed by wet chemistry using similar molarities of Zinc Acetate dehydrate & Hexamethylenetetramines (C6H12N4, 99.5%) on Aluminum substrate. Surface morphology of ZnO (NSs) was characterized using Scanning Electron Microscope (SEM) which showed changing in shape. Pictures of ZnO nanobelts, nanotubes and nanoroses were achieved with the average dimensions ranging between 100 to 300 nm. EDX was used to confirm ZnO purity and UV visible absorption spectrum of ZnO was determined and maximum absorption wavelength was located at 410.67 nm. The calculated band gab was found to be 3.04 eV. XRD was used to confirm the crystallinity.


Brent A Wacaser
Purdue University, USA
Title: The growth and characterization of Si and Ge nanowires grown from reactive metal catalysts

Biography:

Abstract: We discuss the benefits of using metals other than Au to catalyze the growth of Si and Ge nanowires, emphasizing the opportunities that these non-conventional materials provide for tailoring electronic and structural nanowire properties. However, since these metals are more reactive than Au, their use creates constraints on wire growth conditions as well as difficulties in post-growth characterization. These issues are illustrated for Si and Si/Ge nanowires grown from Al, Cu and AuAl starting materials. The vacuum requirements for the deposition of the reactive metals are discussed as well as the effect of atmospheric exposure on the structure of wires observed post-growth with electron microscopy.


Brent A Wacaser
Purdue University, USA
Title: Nanoscale chemical templating of Si nanowires seeded with Al

Biography:

Abstract: We describe a new approach for achieving controlled spatial placement of VLS-grown nanowires that uses an oxygen-reactive seed material and an oxygen-containing mask. Oxygen-reactive seed materials are of great interest for electronic applications, yet they cannot be patterned using the approaches developed for noble metal seed materials such as Au. This new process, nanoscale chemical templating, takes advantage of the reactivity of the blanket seed layer by depositing it over a patterned oxide that reacts with the seed material to prevent nanowire growth in undesired locations. Here we demonstrate this technique using Al as the seed material and SiO2 as the mask, and we propose that this methodology will be applicable to other reactive metals that are of interest for nanowire growth. The method has other advantages over conventional patterning approaches for certain applications including reducing patterning steps, flexibility in lithographic techniques, and high growth yields. We demonstrate its application with standard and microsphere lithography. We show a high growth yield and fidelity, with no NWs between openings and a majority of openings occupied by a single vertical nanowire, and discuss the dependence of yield on parameters.


Hammad Alotaibi
Australia
Title: Atomistic patch simulations for di↵usion equation in 3D

Biography:

Abstract: Recently the development of multiscale methods is one of the most fertile research areas in mathematics, physics, engineering and computer science. The computational cost is overwhelming when we predict the behaviour of the dynamics a system for macroscopic space time scales when only the microscopic model is available. It can be impossible to simulate the system over the whole domain. Patch simulation promises a great saving in computation. The main idea of this method is to use locally averaged properties over short space time scales to advance and predict long space time scale dynamics. We assume the patch simulation is periodic. Our aim is to explore the macroscopic properties of a system through atomistic simulations in small periodic patches. The computation will be implemented only on the periodic patch, while over most of the domain we interpolate. We divide the periodic patch into three regions. The core of the patch is surrounded by the left and right action regions. We develop appropriate control terms to the left and right action regions in order to make accurate macroscale predictions.


Mohammad Shiva
Birjand University, Iran
Title: Introduction of Mining Materials having Capabilities for Nanotechnology, part one : Materials

Biography:

Abstract: This paper covers the introduction of the materials which are valuable to be extracted and processed in nanotechnology. There are dozen million tones of mining materials which should be considered as the sources, which their productions are worthy to be produced in the form of Nanotechnology productions. In this part of the paper, part one, the materials are introduced . One of the most important material is the Lithium element. The lithium element as the lightest element, has a widespread using in many industries such as battery industries, electrical vehicles, aluminum alloys, and aerial navigation industries. The lithium element is a very useful element which is valuable to be extracted and being used in nanotechnology products. The main source of lithium element is the bentonite mineral. A huge amounts of this mineral are present in Middle east Countries such as Iran, United Arab Emirates, Turkey, Oman and some others. The economic minerals which comprise the lithium element are Montmorillonite, Bidelite, Natrolite and Hectorite. Among these minerals, Hectorite mineral possesses the greatest amount of lithium and magnesium element in its composition.


Muhammad Mumtaz
International Islamic University, Pakistan
Title: MnFe2O4 Nanoparticles Addition Effects on Temperature and Frequency Dependent Dielectric Properties of Cu0.5Tl0.5Ba2Ca2Cu3O10-δ Superconductor

Biography: Muhammad Mumtaz, is an Assistant Professor (TTS) and Faculty of Basic and Applied Sciences (FBAS) at International Islamic University Islamabad, Pakistan

Abstract: Manganese ferrite (MnFe2O4) nanoparticles and Cu0.5Tl0.5Ba2Ca2Cu3O10-δ (CuTl-1223) superconductor were synthesized separately by sol-gel and two steps solid-state reaction method, respectively. Different concentrations of MnFe2O4 nanoparticles were added in CuTl-1223 matrix to get (MnFe2O4)x/CuTl-1223; x = 0, 0.5, 1.0, 1.5, 2.0 wt. % nanoparticles-superconductor composites. X-ray diffraction was used to find the crystal structure of (MnFe2O4)x/CuTl-1223 nanoparticles-superconductor composites. Unchanged crystal structure of host CuTl-1223 phase (i.e. Tetragonal) after addition of MnFe2O4 nanoparticles confirmed that these nanoparticles were settled at the grain-boundaries. Superconducting properties were over all suppressed after inclusion of MnFe2O4 nanoparticles in CuTl-1223 superconductor due to enhanced scattering cross-section of carriers across these magnetic nanoparticles at the grain-boundaries. Various dielectric properties of (MnFe2O4)x/CuTl-1223 nanoparticles-superconductor composites were investigated by varying test frequencies from 20 Hz to 200 M Hz and operating temperature from 78 K to 303 K. It was found that the values of dielectric parameters were found maximum at lower frequencies, which started to decrease with the increase in frequency. So the dielectric properties of CuTl-1223 superconducting phase can be tuned by varying the contents of MnFe2O4 nanoparticles, test frequencies and operating temperatures.


Nanoscale Electronics

Session Introduction

Carlos Torres-Torres
Instituto Politecnico Nacional, Mexico
Title: Cooperative magneto-optic interactions for encrypting information in hierarchical nanostructures

Biography: Carlos Torres-Torres has a PhD in Optics obtained in the Center for Scientific Research and Higher Education at Ensenada, Mexico. His main researches are about Nonlinear optics exhibited by nanostructures. He has been awarded by the Materials Research Society in United States of America during 2013 regarding his studies about low-dimensional materials. He has been awarded as the best reviewer in 2015 by the Journal of Optics and Laser Technology Elsevier; and also he has been awarded as an outstanding reviewer of the Journal of Physics: Applied Physics by the Institute of Physics of United Kingdom.

Abstract: The third-order nonlinear optical properties exhibited by anisotropic nanostructured materials are strongly sensitive to morphology and polarization of light. In this direction, the vectorial behavior of optical beams can be a powerful tool for exploring particular characteristics in nanomaterials. Instrumentation of all-optical signals in ultrafast nanosystems can be carried out by recording the nonlinear optical transmittance controlled by multi-wave mixing experiments. However, here is described, how the surrounding media where the nanoparticles are immersed can be able to modulate important parameters with influence on the optical transmittance of nanophotonic signals. Significant magnetic contributions that may be responsible for a modification in the resonance or in the scattering of light can be promoted by hybrid and hierarchical nanoparticles. In this research are discussed the implications of collective nonlinear magneto-optic effects in low-dimensional materials. Quantum and cryptology applications based on superposition and multiplexing signals can be contemplated.


Hugh G. Manning
CRANN Institute, Ireland
Title: Non-Polar Resistive Switching of Core-Shell Nanowires

Biography: Mr. Hugh Manning B.A (mod), is a final year chemistry PhD candidate in Prof. John J. Boland’s nanowire research group which operates in the Centre for Research on Adaptive Nanostructures and Nanodevices; one of the largest research institutes in Trinity College Dublin and Ireland's leading nanoscience institute. Research interests include connectivity at a nano and macro scale, characterization of nanowires and nanowire networks, for use as transparent conductors, resistive switching memories, reservoir computing and neuromorphic applications. He is also an educator for Physics at Trinity Walton Club, a not-for-profit STEM Education program.

Abstract: Nanowire networks are of immense technological interest due to their properties of high transparency, high porosity, flexibility, ease of fabrication, and low cost. Engineering materials with emergent properties requires designing and characterising nanowire systems with desirable properties. One of these properties is the ability to undergo resistive switching, a transition from a high resistance state to a low resistance state. We report on the unique types of behaviours that emerge from combining Ag nanowires (AgNWs) with TiO2 in the form of solvothermal synthesised Ag core TiO2 shell nanowires. The presence of both bias dependent bipolar resistive switching (BRS) and bias independent unipolar resistive switching (URS) is termed nonpolar switching.1 Nonpolar operation has been demonstrated separately in metal-insulator-metal (MIM) and transition metal oxide (TMO) NW devices, however to date, the demonstration of nonpolar operation in a single NW has not yet been reported.2 Both BRS and URS is demonstrated for the first time in Ag/TiO2 core-shell nanowires. The switching mode could be chosen by adjusting the compliance current (ICC) and/or the amount of charge flown through the nanoscale junction. Nonpolar systems such as this, which evolve behaviours over time have possible applications as neuromorphic elements. ON/OFF ratios of 105 and 107 were obtained for BRS and URS modes respectively. In the bipolar regime, devices were cycled over 100 times, by setting the ICC ON state retention could be controlled up to 103 s. In unipolar mode, retention times > 106 s were recorded.


Imtiaz Madni
University of Western Australia, Australia
Title: Controlled Synthesis of Photodetector Nanowires of Bismuth Selenide

Biography: Imtiaz Madni is an early carrier researcher at The University of Western Australia, where he is working on epitaxial growth and characterization of semiconducting materials. His specialties are in exploring new and innovative materials for applications in future generation electronics. Imtiaz is working on revolutionary Quantum confined, low-dimensional materials to develop infrared detecting devices and topologically protected super-highways for electronics. He is currently working as a doctoral scholar at University of Western Australia. Before taking this position in Australia, he was working as a post-graduate researcher at Chinese Academy of Sciences in China.

Abstract: The unique physical and chemical properties of 2D materials have made a significant impact on research and development of modern electronics, spintronics, photonics, and energy technology. Recently, the layered V-VI binary compounds Bi2Se3, Bi2Te3, Sb2Te3 and their ternary compounds were discovered as topological insulators, which are considered as a new class of materials revealing new phases of quantum matter, possessing conducting surface states while showing bulk insulating properties. Ultrathin nanosheets of Bi2Se3 have been successfully employed for the photocurrent studies. Motivated by these advantages, we investigated the vapor-solid growth of nanowires of Bi2Se3 on Si substrate. Here we demonstrate the photoresponse of Bi2Se3 nanowires grown by a facile and high-yield vapor deposition method with well-aligned orientation, and controlled length. Significant photocurrent response was observed when nanowires were illuminated with visible light lamp. The photocurrent dynamics of the nanowires were characterized for cyclic exposure of visible light to study the stability and repeatability of the photocurrent. The crystalline quality and surface morphology of the as grown Bi2Se3 nanowires were investigated by using XRD, high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and atomic force microscopy (AFM). High photoresponsivity was observed in Bi2Se3 nanowires, which is 4-5 orders of magnitude higher than the photoresponse of nanoplates of Bi2Se3. The efficient generation-recombination mechanism in nanowires can be attributed to quantum confinement effects, and larger aspect ratio.


Ammar Nayfeh
Masdar Institute of Science and Technology Abu Dhabi, UAE
Title: 3-nm-Thick ZnO Nanoislands Charge Trapping Layer for Memory Devices Grown by Single ALD Step

Biography: Ammar Nayfeh received his PhD degree in electrical engineering in 2006 from Stanford University. After his PhD, he joined Advanced Micro Devices as a researcher working in collaboration with IBM. Following that, he then spent a year as a consultant with PDF solutions and later joined a siliconvalley start-up, Innovative Silicon (ISi) in 2008. In addition, he was a part time professor at San Jose State University. In June 2010, he joined MIT as a visiting scholar and became a faculty member at the Masdar Institute of Science and Technology in Abu Dhabi, UAE. At Masdar, he is director of the Nano Electronics and Photonics Laboratory where his primary research interests include, novel PV devices, Low-Power Nano-Electronics, High-Performance Nano-Electronics, Nano-Photonics, and Nano-Memory Technologies. Professor Nayfeh is currently an associate professor in the Department Electrical Engineering and Computer Science (EECS) at the Masdar Institute of Science and Technology. Professor Ammar Nayfeh has authored or co-authored over 80 publications, and holds three patents. He is a member of IEEE, MRS and Stanford Alumni Association. He has received the Material Research Society Graduate Student Award, the Robert C. Maclinche Scholarship at UIUC, and Stanford Graduate Fellowship.

Abstract: Low-dimensional semiconductor nanostructures are of great interest in high performance electronic and photonic devices. However, in order to preserve the continuous scaling of current memory devices, the charge-trapping capability of the charge-trapping layer has to be further improved [1-4]. In addition, ZnO is considered to be a multifunctional material due to its unique properties with potential in various applications. In this work, 3-nm ZnO nanoislands are deposited by Atomic Layer Deposition (ALD) and the electronic and structural properties are characterized by Atomic Force Microscopy (AFM), UV-Vis-NIR Spectrophotometer and X-ray Photoelectron Spectroscopy. The results show that the nanostructures show quantum confinement effects in 1D where the bandgap is increased and the electron affinity is reduced. Moreover, Metal-Oxide- Semiconductor Capacitor (MOSCAP) charge trapping memory devices with ZnO nanoislands charge storage layer are fabricated by a single ALD step and their performances are analyzed. The devices showed a large memory window at low operating voltages with excellent retention and endurance characteristics due to the additional oxygen vacancies in the nanoislands and the deep barrier for the trapped holes due to the reduction in ZnO electron affinity. The results show that the ZnO nanoislands are promising in future low power memory applications.


Ali Ben Ahmed
University of Sfax, Tunisia
Title: Molecular structure, spectroscopic characterization and Non Linear Optical properties of New Non centro-symmetric compound: A DFT approach.

Biography:

Abstract: Crystalline salts of optically active amino acids represent an important class of so-called semi-organic crystals, which can combine the positive features of both, organic and inorganic crystals. In particular, the salts of L-histidine (L-His) display high Non Linear Optical (NLO) properties due to the presence of imidazole and amino-carboxylate groups in histidine molecule. The NLO properties depend on different parameters: chemical composition, symmetry, conformation and charge state of cation, hydrogen bonds, etc. In order to study the effect of these parameters we have prepared a series of NLO based histidine crystals with various inorganic acids: L-His+HBr + H2O [1], L-His + HCl + H2O [2], L-His+ C2H2O4 [3] and L-His+ (H3PO4, H2PO4) [4]. The crystals structures where determined by X-Ray Diffraction. All compounds exhibits acentric unit cell. In order to investigate microscopic non-linear optical (NLO) behaviour we have carried out a theoretical study of the examined complex, the electric dipole µ, the polarizability α and the first hyperpolarizability β were computed using DFT//B3LYP/6-31G (d) method. The calculation shows that all salts of L-histidine exhibits non-zero β value revealing microscopic second order NLO behavior: (L-His+ C2H2O4 [β = 10.2308 10-31 esu]; L-His+HBr+H2O [β = 16.33 10-31 esu]; L-His+ (H3PO4, H2PO4) [β = 24.99 10-31 esu] and L-His.HCl.H2O [β = 31.97 10-31 esu]). Due to the acentric unit cell and the high hyperpolarizability, all synthesis compounds could be promising materials for NLO applications.


Posters

Session Introduction

Ivania Nikolova Markova
University of Chemical Technology and Metallurgy, Bulgaria
Title: Template synthesis and study of intermetallic (Co-Sn, Ni-Sn, Co-Ni) nanoparticles and their carbon-containing nanocomposites

Biography: Scientific interests in the area of the synthesis of metallic/intermetallic nanoparticles and their carbon-containing nanocomposites through a borohydride reduction with NaBH4 in aqueous solutions of metallic salts including applying the template technique using a support; characterisation the nanomaterials with physical-chemical investigation methods; FTIR spectroscopy method for study the nanosurface phenomena. Teaching (Lecture courses) in Semiconductor materials, Magnetic materials, Nanomaterials, Deep purification of the materials for microelectronics, Membrane technologies.

Abstract: Intermetallic (Co-Sn, Ni-Sn, Co-Ni) nanoparticles have been synthesized through a borohydride reduction at room temperature and atmospheric pressure with NaBH4 in a mixture of aqueous solutions of the relevant chloride salts of Co, Ni, and Sn at a ration between the metallic components chosen according to the phase diagram of the corresponding binary (Co-Sn, Ni-Sn, Co-Ni) systems, respectively Co: Sn=35:65, Ni: Sn=45:55, Co: Ni=50:50. These nanoparticles have been also obtained through the same method, but applying a template technique using a carbon-containing support. As a result nanocomposite materials have been in-situ obtained. Graphite has been used as a carbon-containing support. To avoid the nanoparticle aggregation β-cyclodextrin has been added to the reaction solutions. The morphology, elemental and phase composition of the synthesized intermetallic nanoparticles have been investigated by the help of SEM, EDS and XRD respectively. The nanoparticles are different by shape and in size and exhibit a tendency to aggregation due to the unsaturated nanoparticle surface and the existed magnetic forces. The nanoparticle’s morphology is typical for the alloyed materials. The formed phases are in accordance with the respective binary system phase diagrams: phases of CoSn and CoSn2 for the Co-Sn (Co: Sn=35:65) nanoparticles, phases of Ni3Sn4, Ni3Sn2 and Ni3Sn for the Ni-Sn nanoparticles (Ni: Sn=45:55), phases of Co and Ni for the Co-Ni nanoparticles (Co: Ni=50:50). The obtained alloyed (Co-Sn, Ni-Sn, Co-Ni) nanosized powders and their carbon-containing nanocomposites have been studied by FTIR spectroscopy in a mid-IR region from 4000 to 400 cm-1. On the basis of the collected FTIR spectra, respectively bands of absorption with peaks at the relevant frequencies the kind of vibrations (symmetric or asymmetric stretching and bending) of the created chemical bonds in different atom groups such as COH, CH2, OH, H2O, C=C, COOH, BO3, BO4, Me-O (Me=Co, Sn, Ni) have been determined. Key words: intermetallic nanoparticles, carbon-containing nanocomposites, chemical reduction, template synthesis, FTIR spectroscopy


Marlus Chorilli
Universidade Estadual Paulista, Brazil
Title: Polyethyleneimine and Chitosan -based precursor liquid crystalline system with in situ gelling for buccal drug delivery systems

Biography: Marlus Chorilli holds Pharmacist, M.Sc. (2004) and PhD (2007) degrees in Pharmaceutical Sciences from São Paulo State University. He is presently an Assistant Professor at the School of Pharmaceutical Sciences of Araraquara of São Paulo State University, where he teaches Pharmacotechniques and Pharmaceutical Technology. He leads the research group “Research and Development of Nanotechnology-based Drug Release Systems” (CNPq – Brazil) and is a Reviewer of Journals in the field of Pharmaceutical Sciences and a scientific adviser to Brazilian and International research funding agencies (CNPq – Brazil, FAPESP-Brazil and FONDECY-Chile).

Abstract: The buccal route is very attractive for the drug administration because the buccal mucosa is permeable and robust allowing the rapid recovery after stress or damage besides presents an excellent blood supply and absence of the first pass effect, avoiding the drug pre-systemic metabolism by the gastrointestinal tract [1]. Despite its advantages, the buccal mucosa has some limitations, mainly due to the continuous secretion of saliva (0.5 to 2 L/day), which may lead to dilution and possible ingestion of the drug and, lastly, to the unintentional removal of dosage form [2]. Precursor lyotropic liquid crystalline system (PLCS) represents a promising buccal drug delivery system because it can be presented as liquid, facilitating the formulation administration, for example, by syringe. However, upon contact with the buccal environment, the PLCS has the ability to incorporate water from saliva, becoming a viscous liquid crystalline system (LCS), which can promote the drug controlled release and provide a great drug substantivity at the action site [3]. Polyethyleneimine (PEI) is a water soluble polymer with high cationic charge density at physiological pH which has been investigated to promote cellular uptake of drugs [4]. Chitosan (CS) is a cationic polymer that can improve the adhesion of PLCS by the buccal mucosa through the molecular forces by electrostatic interactions with the saliva that is negatively charged [5]. Therefore, the aim of this work was to develop a precursor liquid crystalline system consisting of oleic acid as the oily phase, Procetyl® AWS as surfactant and dispersion of PEI 0.25% wt. and CS 0.25% wt. as the aqueous phase, to characterize by polarized light microscopy (PLM), small angle x-ray scattering (SAXS) and evaluate the in situ gelling property with saliva. Based on the results obtained, it was possible to develop a PLCS with those above components; moreover, PLCS could become a viscous LCS with the saliva addition that was proved by PLM and SAXS. Thus, the results presented here provide a novel LCS for buccal drug delivery systems.


Bernd Mueller
Philipps University Marburg, Germany
Title: Toxic Potential of Benzo[a]pyrene and 9-Nitroanthracene Surface Modified Carbon Black Nanoparticles on None- and Pre-damaged Mice Lungs in Long-term Exposure

Biography: Professor Bernd Müller is a biologist working and teaching on the Philpps University Marburg, Germany. He works in the field of inhalative environmental air pollutants and their effects of the respiratory system. He is leads the Laboratory of Respiratory Cell Biology in the Medical Faculty, and is head of the multidisciplinary NanoCOLT project which is a substantial part of the Germany BMBF Government NanoCare program. He consults several institutions and companies on lung toxicity matters of engineered carbon black nanoparticles as well as of gaseous engine exhausts.

Abstract: Rationale: Selective synthesis of engineered carbon black nanoparticles (CBNPs) is associated with specific particle surface modification in order to fulfill demands for their points of application. Opposite, airborne CBNPs can unspecifically interact with atmospheric components and thus alter their surface area. To date there is not much known about the toxic potential of inhaled surface modified nanoparticles on the respiratory tract during long-term exposures. This study was done using Printex®90 as basic particle to which benzo[a]pyrene or 9-nitroanthracene was bound. In addition, acetylene carbon black with polycyclic aromatic hydrocarbons was studied to mimic an environmental relevant particle. All CBNPs were tested on mice with healthy and pre-damaged lungs. We expected that 1. Surface modifications (benzo[a]pyrene, 9-nitroanthracene or polycyclic aromatic hydrocarbons) are more harmful to healthy lungs and 2. Pre-damaged lungs show stronger reactions than healthy subjects. Methods: Subchronic exposure of CBNPs was done on 10 wk old BALB/c mice. Lung pre-damage was initiated by a 72 h exposure with 5 ppm nitrogen dioxide (NO2). Healthy subjects received ambient air. All mice were treated with particle suspensions on day 0 and every following second week for 3 months. Saline, DQ12 quartz and unmodified Printex®90 served as controls. At the end lungs were prepared for histological examinations using picrosirius red and immunohistochemical glutathione reductase and γ-H2AX genotoxicity staining. Bronchoalveolar lavage fluid (BAL) was performed to compare total cell yields, cell compositions and phospholipid as well as protein concentrations. Type II pneumocytes were finally isolated to examine cell protein concentrations and mRNA expressions of surfactant synthesis enzymes like choline phosphate cytidylyltransferase α. Results: Lung tissue staining revealed equal nanoparticle distribution across the lungs but showed no signs of thickened alveolar septa, increased collagen structures or changes in glutathione reductase or γ-H2AX expression. However, all surface modifications induced decreased protein concentrations in healthy and increased protein levels and elevated total cell yields in BAL fluids of NO2 pre-damaged mice lungs compared to their corresponding saline controls. Conclusions: 1. None of the CBNP surface modifications induced massive changes in lung structure but exhibited measurable changes in BAL protein and phospholipid concentrations or total cell yield as well as altered type II pneumocyte cell yields, protein concentrations and mRNA expressions. 2. Pre-damaged lungs seem to react not as sensitive as expected but different compared to healthy subjects. We speculate, that protein corona formations on functionalized particle surfaces might inhibit modification associated toxic effects on lung structures.


Prajakta A. Barve
Savitribai Phule Pune University, India
Title: Comparative study of three different graphene oxide synthesis methods

Biography:

Abstract: Graphene oxide is oxidized form of graphite in planer structure having sp2hybridized carbon atoms. It has honeycomb like structure and can be easily synthesized via Hummer’s method or modified hummers method [1]. Graphene oxide is hydrophilic and its surface can be easily modified with a host of biocompatible material. It possesses properties such as electrical (e.g. high carrier mobility and capacity), electrochemical (e.g. high electron transfer rate), mechanical (e.g. robust and flexible) and optical (e.g. high opacity, ability to quench fluorescence) [2]. Theoretically, quenching efficiency of graphene oxide can be as high as 103. [3] Graphene oxide is widely explored for its applications in various fields like medicine, environment, electronics etc. Graphene oxide was synthesize using three methods, aiming maximum oxidation of graphite in minimum time requirement and the reaction would result comparatively less amount of toxic byproducts. The synthesized products were characterize and confirmed by FTIR, XRD and RAMAN spectroscopy and TEM microscopy. Synthesized graphene oxide was confirme by XRD and Raman analysis. The characteristic XRD peak at 2=10° indicates the presence of oxidized graphene. Raman spectrum showed D band at 1355cm-1 and G band at 1604cm-1. From TEM, interlayer distance obtained was 0.42nm. The comparison in three methods will help to synthesize graphene oxide with maximum purity in minimum time requirement.


Shital Vishnu Sable
Savitribai Phule Pune University, India
Title: Potential Nano-biotechnology approaches for early diagnosis of lung cancer

Biography:

Abstract: Abstract—Nanobiotechnology is the emerging field for new possibilities in the early diagnosis of lung cancer. Lung cancer is the prime cause of mortality from cancer among men and women worldwide. Although the new techniques are available for early detection, the overall 5-year survival rate remains same. Therefore, for the lethal disease like lung cancer, it is necessary to diagnose and treat it at its early stages to increase the 5-year survival rate. To date no screening method has shown to decrease the disease specific mortality rate. In diagnostics, fluorescence property of nanoparticles can be used for early detection of cancerous cells, which are circulating in blood. Several chemotherapy agents are formulated with nanoparticles. In lung cancer, plasma novel biomarkers such as zyxin and micro RNA are detected using mass spectroscopy and ELISA in early stage of cancer. These methods are costly and time consuming. Ultimately, use of novel metal nanoparticles will allow rapid unique manner for early diagnosis. In this review, we describe the problems related to early lung cancer screening, which can be overcome using innovative ideas of Nano-biotechnology and an overview of the clinically applicable novel nanoparticles in oncology, with special attention on diagnosis of early lung cancer.


Maryam Vahabi
Tarbiat Modares University, Iran
Title: Insecticidal properties of nanoencapsulated essential oil extracted from Artemisia sieberi on Xanthogaleruca luteola

Biography: Maryam vahabi mashhoor has her expertise in improving the safe pesticides. She believes that the usage of botanical pesticides, due to the deleterious effects of chemical pesticides on non-target organisms, beneficial insects and the environment, would be a safe and suitable method for the pest control. As her opinion, Nanofurmulated botanical pesticides can be a good option to be replaced with chemicals. she has investigated on contact toxicity, repellent activity, nutritional indices and damage assessment of Artemisia sieberi Besser essential oil on Xanthogaleruca luteola (Muller) before and after Nanoencapsulation and now she is studying on the new effective nanoformulated pesticides that can be used for urban landscape pests. She is skilled about application of new pesticides on the urban trees pests and now she is studying on a new effective Nanoemulsion Formulation of Some Plant Extracts on Physiology of The Elm Leaf Beetle, This formulation can control this pest successfully and she believes it can be a suitable alternative to chemical insecticides.

Abstract: In recent decades, extensive researches have been established on various botanical pesticides in order to achieve safe and effective alternatives to chemical pesticides. To replace these compounds with chemical insecticides, it should be achieve to effective and new formulation technologies to overcome limitations of essential oils. Nowadays, in urban landscape, leaf elm beetle (ELB) Xanthogaleruca luteola (Muller) (Coleoptera: Chrysomelidae) is considered as a serious pest of elm. Larvae feed on the lower leaf surface and the upper part and veins are left intact but adults create small irregular but discrete holes in the leaves. Sagebrush Artemisia sieberi Besser is a native medicinal plant to Iran that is considered by researchers due to its insecticidal activities. In this study, contact toxicity of nanoencapsulated formulation of A. sieberi essential oil was investigated on eggs, third instar larvae and adults of ELB at different concentrations. Therefore, the formulation of nanocapsules was sprayed on leaves containing eggs, larvae or adults. Experiments were conducted at 25 ± 2 °C, 65 ± 5% relative humidity and photoperiod of 16:8 h (L: D). The results showed that mortality was increased as concentration and exposure time increased. LC50 value of the formulation 24 h after application was 1010, 1131 and 837 ppm active ingredient for eggs, larvae and adults, respectively. Based on findings, nanoencapsulated formulation of sagebrush with controlled release capability could be considered for effective control of ELB.


Suhyun Ju
Pusan National University, Republic of Korea
Title: Simple Transformation of Hierarchical Hollow Structure by Reduction of Metal-Organic Frameworks and Their Catalytic Activity in Oxidation of Benzyl Alcohol

Biography: Kang Hyun Park received his Ph.D. in 2005 under the supervision of Y. K. Chung and worked on the synthesis of transition metal nanoparticles and their application in organic reactions. He did his postdoctoral work with Professor Seung UK Son at Sungkyunkwan University in 2006–2007. In 2008, he was named an Assistant professor and Associated professor at Pusan National University and was appointed as a professor in 2017. His research interests include the development of new transition metal-nanoparticles catalyzed reactions.

Abstract: We presented a new approach to fabricate hollow structures through the reduction of Cu3(BTC)2. A series of reduced-Cu3(BTC)2 (denoted as RCB) was prepared by a hydrazine hydrate as a reducing agent in various conditions. The prepared RCBs showed a hierarchical structure with the appearance of numerous thorns growing on the surface of a hollow structure. We discussed the influence on the structure of Cu3(BTC)2 induced by hydrazine hydrate and discovered dynamic variation of the interior and exterior and oxidation state of Cu ion. In addition, the prepared RCBs were found to have higher catalytic activity of benzyl alcohol oxidation assisted by TEMPO in comparison with other catalysts based on Cu3(BTC)2. due to the existence of a large amount of Cu(I). This significant improvement of catalytic activity is closely related to the initial oxidation state of the copper catalyst.


Agnes Weimer
University of Hamburg, Germany
Title: Synthesis and characterization of magneto responsive nanocomposites of monodisperse superparamagnetic iron oxide nanoparticles homogenously dispersed in a poly(ethylene oxide) melt.

Biography: Agnes Weimer is a PhD candidate at the University of Hamburg and works in the department of physical chemistry in the research group of Prof. Dr. Horst Weller. Her work now focuses on development and optimization of advanced contrast agents for MRI and new tracers for magnetic particle imaging (MPI) based on shape- and size controlled iron oxide nanoparticles. Furthermore, she is working on the phase transfer of nanoparticles and the synthesis of multifunctional nanohybrids with adjustable surface properties. Agnes earned a bachelor of science and master of science in chemistry from the University of Hamburg.

Abstract: Blending of soft polymer matrices with nanocrystals (NC) displaying high surface-to-volume ratios has led to nanocomposites with exceptional properties and therefore have a large potential for applications in materials science.1–3 However, synthesis of homogeneous polymer-NC nanocomposites is still one of the biggest problems, because of the immiscibility of the inorganic NC with an organic phase. Several approaches to overcome this difficulty exist, especially by grafting polymer chains on the particle surface of the same chemical nature as the matrix polymer.4 However, phase separation has to be prevented by introducing a robust ligand shell. Micellar encapsulation is based on the hydrophobic part of amphiphilic polymers (diblock copolymers) intercalating with the hydrophobic ligand shell of the particle while the hydrophilic part is reaching into the aqueous solution.5 The hydrophilic part often consists of poly(ethylene oxide) (PEO). The stability of the micelles can be further increased by crosslinking the hydrophobic part and this is a crucial parameter for the homogenous distribution of the NC within the polymer matrix. The crosslinking of the polymer shell by covalent bonds provides maximum stability during mixing step with the host matrix and results in uniform hybrid SPIONs homogeneously dispersed in a poly(ethylene oxide) matrix. Small angle X-ray scattering (SAXS) and transmission electron microscopy (TEM) investigations demonstrate the presence of mostly single particles and a negligible amount of dyads. The combination of advanced synthesis and encapsulation techniques using different diblock copolymers and the thiol-ene click reaction for crosslinking the polymeric shell results in homogenous magneto responsive nanocomposites.


Jun-Ho Jang
Korea Institute of Industrial Technology, Korea
Title: Evaluation of Cu-coated graphite compacts prepared by pulsed current activated sintering process

Biography: Mr. Jun-Ho Jang is a Researcher at Korea Institute of Industrial Technology(KITECH), Korea

Abstract: Cu-coated graphite powder for weight reduction and a high thermal conductivity was fabricated using a chemical reaction process. First, 4 g of graphite powders, which was treated using an activation and wetting process, was added to an aqueous solution of copper (Cu) sulfate; also, zinc (Zn) powders (such as 35, 40, 45, and 50 wt.%) was added as a transposition solvent to the aqueous solution and stirred for 1 hr for a transposition reaction. After the addition of the fabricated powders mixture to a 75 wt.% DI water: 10 wt.% H3PO4 : 10 wt.% H2SO4 : 5 wt.% mixture, tartaric acid was added to the aqueous solution to produce a passivating oxide film, followed by a drying for 24 hrs. The particle size of the fabricated powder, which is coarser than the initial graphite powder, is approximately 3 µm to 4 µm, and the low-intensity oxide peak of the XRD pattern of the fabricated powders is due to the low Zn powder content. With the use of the Cu-coated graphite powder, Cu-coated graphite sintered bodies were fabricated using a pulse current activated sintering (PCAS) process. The Cu-graphite sintered bodies were sintered with heating rate of 60, 100 and 150 o C/min, respectively. The Cu-coated graphite powders and compacts were evaluated using FE-SEM, EDS, XRD, a particle analysis, and the Archimedes method.


Ardeshir Baktash
Amirkabir University of Technology, Iran
Title: Studying Direct vs Indirect Bonding of Dye Molecule and Role of Central Metals, Cu and Zn, on Bonding of Dye to the TiO2 Cluster

Biography: Ardeshir Baktash is a part time researcher at Amirkabir University of Technology. He obtained his bachelors of applied physics at Karaj Islamic Azad University. Also, he completed his masters in Physics from Amirkabir University of Technology. His current research is focused on electronic structure of graphene like materials. His previous research work was about electronic structure of anatase TiO2 for the application in dye sensitized solar cells.

Abstract: Using density functional theory (DFT) with the SIESTA package we studied the modification of anatase TiO2 cluster by the attachment of different linkers on the anatase TiO2 cluster. The studied system involves two metal centered Porphyrin molecules that adsorbed on TiO2 nanoparticles with and without the use of Carboxylic acid and phosphonic acid linkers. The cluster (TiO2)14 is used for calculating the adsorption energy of dye molecules on TiO2 nanoparticles. The used cluster contained (TiO2)14 to calculate the adsorption energy of dye molecules on TiO2 nanoparticles. The generalized gradient approximation (GGA) with the Perdewe Becke e Erzenhof (PBE) [1] function was chosen for exchange correlation (XC) functional. We used a double zeta polarization (DZP) basis set for all atoms. Optimization was carried out with a force tolerance of 0.04 eV Å. Also, a 250 Ry mesh cutoff for the geometrical optimization of the system was used. Moreover, we used a confinement radius corresponding to an energy shift of 0.01 eV for all studied systems. In axially coordinated DSSCs the dye is attached to TiO2 via linker and the anchor group of the linker plays a very important role in stability and electron transfer between dye and TiO2 nanoparticles. In this study, the effect of direct and indirect attachment of Cu and Zn centered porphyrin molecules on formation energy and bonding of molecules to TiO2 cluster are investigated. Strength of bonding is investigated via studying COOP (crystal orbital overlap population) curves of the Ti and Oxygen atoms attached to each other to form the DSSCs. It is shown that central metals as well as anchoring group could have a significant effect on the stability of structures in axially coordinated DSSCs. Also, attaching dye to the linker has minor effects on bonding of linker to the cluster. And, based on the electronic structure of carboxilyc acid and phosphonic acid linkers it has been suggested a reason for better performance of DSSCs with carboxylic acid anchors instead of phosphonic acid anchors.


Yasamin Bide

Title: A reusable bifunctional catalyst for glycolysis of polyethylene terephthalate

Biography: She received her PhD degree in August 2014 under the guidance of Prof. Nabid at Shahid Beheshti university in Iran. Currently, She is working as a postdoc researcher at Shahid Beheshti university, in the nanocatalysts especially carbon-based catalysts.

Abstract: We present superparamagnetic hybrid material as an efficient and environment-friendly bifunctional catalyst for a sustainable polyethylene terephthalate chemical recycling. The presented catalyst exhibit superparamagnetic behavior because of the infinitely small coercivity arising from the negligible energy barrier in the hysteresis of the magnetization loop. By magnetic recovering of the catalyst, the danger of releasing harmful catalyst components to the environment is reduced and the process becomes more cost-effective and sustainable. To the best of our knowledge, bifunctional catalyst including acidic and basic sites have never been used in any glycolysis reactions, particularly for polyethylene terephthalate. Morphological structure of the resulting hybrid material has been verified by SEM and TEM


Jin-Young Lee
Korea University, Korea
Title: Properties of Low-Carbon High Strength Concrete Beams using blast furnace slag

Biography: Jin-Young Lee is a PhD candidate in the School of Civil, Environmental and Architectural Engineering at Korea University. His research interests include high-performance concrete, fiber-reinforced polymer, and impact and blast resistance of concrete structure members.

Abstract: In recent years, the development of low carbon high strength concrete containing high volume mineral admixtures. Replacing Portland cement with mineral admixtures such as fly ash, silica fume and blast furnace slag has been a widely adopted strategy due to their pozzolanic reactivity and latent hydraulic activity. Thus, for the low-carbon high strength concrete incorporating high volume of mineral admixtures exhibit fast and enhancement of early age strength need to be steam-cured with heat. According to the previous research, in the case of 0.275 W/B, the blast furnace slag replacement ratios of 60% were most effective in improving the compressive strength of stream curing, both early and during long-term aging. But high strength concrete is intrinsically brittle, exhibiting low fracture energy. The use of discontinuous steel fibers is expected to be most efficient in improving the flexural performance of concrete under static loads assuming identical volume fraction of added fibers. And ACI Subcommittee 318-F recommended the use of a minimum fiber volume fraction of 0.75% for replacing minimum shear reinforcement through the use of steel fibers. Thus, the use of hooked-end steel fibers with the aspect ratio of 65 was more effective in improving the flexural strength and compressive strength. And the compressive strength over 70MPa in the 28 days both low carbon high strength concrete (HSC) with and without hooked steel fibers (HSFRC). In the ACI Subcommittee 319-F recommended and many researchers have shown that the use of steel fibers in beams without shear reinforcement can enhance shear resistance and promote flexural failure a ductility. For the evaluation of shear characteristics of Low-carbon HSC and HSFRC which mixtures were developed in a previous study. The series of five full-scale high strength reinforced concrete (HSC) beams were tested to evaluate the effects of steel fibers in shear capacity. And the two size types of beams will fabricate and evaluate the effect of size effect in this study. Furthermore, from this series of test, examined the effect of fibers on shear resistance, failure mechanism, ductility, and cracking that specimen made of low carbon HSC or HSFRC containing by high volume blast furnace slag.


Sae-Wan Kim
Kyungpook National University, South Korea
Title: Hybrid bi-stable memory device based on CdSe/ZnS quantum dots embedded in aluminum oxide nano-cluster

Biography: Sae-Wan Kim, received the B. S, M. S degrees in the School of Electronics Engineering, College of IT Engineering from Kyungpook National University, Daegu, South Korea in 2012 and 2015 respectively. He is currently working toward the PhD degree in Prof. Shinwon Kang’s group at Kyungpook National University. His current research is focused on the study of nanomaterials and memory device.

Abstract: The proposed memory device based on CdSe/ZnS quantum dots (QDs) was fabricated by using spin coating. The quantum confinement effect observed in QDs provide the hysteresis characteristics in I-V curve [1]. Especially, the charge storage layer (CSL) of fabricated memory device was formed using QDs and aluminum oxide nano-cluster. The nano-cluster can sustain the trapped charge at the core of QDs for a longer time compared to only QDs used memory device. Also, to improve the retention time characteristics and stability, PEDOT:PSS and ZnO layer was also formed. The PEDOT:PSS layer increase the hole injection from ITO to core of QDs and ZnO layer protect the lower QDs layer. The schematic diagram of fabricated memory device was shown in figure 1, the band diagram was shown in figure 2. The hole was injected from ITO to QDs by tunneling with the proper positive voltage, by applying proper negative voltage, the trapped charge was extracted from QDs to ITO, which provide the hysteresis in I-V curve. Compared to QDs only used memory device, the nano-cluster used memory device have the higher on/off ratio and longer retention time.


Maryam Vahabi
Tarbiat Modares University, Iran
Title: Insecticidal properties of nanoencapsulated essential oil extracted from Artemisia sieberi on Xanthogaleruca luteola

Biography: Maryam Vahabi Mashhoor has her expertise in improving the safe pesticides. She believes that the usage of botanical pesticides, due to the deleterious effects of chemical pesticides on non-target organisms, beneficial insects and the environment, would be a safe and suitable method for the pest control. As her opinion, Nanofurmulated botanical pesticides can be a good option to be replaced with chemicals. she has investigated on contact toxicity, repellent activity, nutritional indices and damage assessment of Artemisia sieberi Besser essential oil on Xanthogaleruca luteola (Muller) before and after Nanoencapsulation and now she is studying on the new effective nanoformulated pesticides that can be used for urban landscape pests. She is skilled about application of new pesticides on the urban trees pests and now she is studying on a new effective Nanoemulsion Formulation of Some Plant Extracts on Physiology of The Elm Leaf Beetle, This formulation can control this pest successfully and she believes it can be a suitable alternative to chemical insecticides.

Abstract: In recent decades, extensive researches have been established on various botanical pesticides in order to achieve safe and effective alternatives to chemical pesticides. To replace these compounds with chemical insecticides, it should be achieve to effective and new formulation technologies to overcome limitations of essential oils. Nowadays, in urban landscape, leaf elm beetle (ELB) Xanthogaleruca luteola (Muller) (Coleoptera: Chrysomelidae) is considered as a serious pest of elm. Larvae feed on the lower leaf surface and the upper part and veins are left intact but adults create small irregular but discrete holes in the leaves. Sagebrush Artemisia sieberi Besser is a native medicinal plant to Iran that is considered by researchers due to its insecticidal activities. In this study, contact toxicity of nanoencapsulated formulation of A. sieberi essential oil was investigated on eggs, third instar larvae and adults of ELB at different concentrations. Therefore, the formulation of nanocapsules was sprayed on leaves containing eggs, larvae or adults. Experiments were conducted at 25 ± 2 °C, 65 ± 5% relative humidity and photoperiod of 16:8 h (L: D). The results showed that mortality was increased as concentration and exposure time increased. LC50 value of the formulation 24 h after application was 1010, 1131 and 837 ppm active ingredient for eggs, larvae and adults, respectively. Based on findings, nanoencapsulated formulation of sagebrush with controlled release capability could be considered for effective control of ELB.


Hugh G Manning
2CRANN Institute, Ireland
Title: Selective Area Spray Deposition of Nanomaterials

Biography: Hugh Manning B.A (mod), is a final year chemistry PhD candidate in Prof. John J. Boland’s nanowire research group which operates in the Centre for Research on Adaptive Nanostructures and Nanodevices; one of the largest research institutes in Trinity College Dublin and Ireland's leading nanoscience institute. Research interests include connectivity at a nano and macro scale, characterization of nanowires and nanowire networks, for use as transparent conductors, resistive switching memories, reservoir computing and neuromorphic applications. He is also an educator for Physics at Trinity Walton Club, a not-for-profit STEM Education program.

Abstract: Realizing devices which include a combination of nano and macro elements demands the controlled placement of nanomaterial features on the surface of solid and flexible substrates. This has traditionally been achieved either by in-situ growth, or post-fabrication patterning and deposition. In-situ growth being impossible for solution synthesized nanomaterials and ordinarily requiring high temperatures which are not compatible with soft substrates. Solution-based deposition techniques are typically simple, low-cost and relatively easy to scale up. We describe a technique to selectively deposit areas of nanomaterials through electron-beam lithography and solution-based spray deposition. Surface energy driven effects between the nanomaterial and substrate cause an observed local gathering or sticking of nanomaterials on the polymer resist layer depending on the nanomaterial surface coating. This is confirmed by AFM manipulation of individual Cu and Ag NWs on SiO2 and polymer surfaces. As well as optical tracking of nanowires adhering to the surface during dropcasting. The gathering effect makes this method invaluable when patterning low-yield or expensive nanomaterials. This top-down direct write lithographic process is utilized for the placement of Ag and Cu isolated nanowire networks (FIG 1.) as well as the creation of unique nano to macroscopic size structures composed of ZnO and Ag nanoparticles. Moreover, it is a step towards the creation and integration of elements comprising of nanoparticles and isolated nanowire networks in macroscale systems.


Mohammed Monier
Taibah University, KSA
Title: Fabrication of Au(III) ion-imprinted polymer based on thiol-modified chitosan

Biography: Prof Mohammed Monier is Associate professor at Taibah University, KSA, his research interest includes Uses of natural polymers in biomedical and environmental applications.

Abstract: Au(III) ions were selectively extracted from aqueous media using Au(III) ion-imprinted bio-adsorbent based on modified chitosan (Au-CMB). First, 2-mercaptobenzaldehyde-chitosan Schiff base was prepared and interacted with Au(III) ions. The obtained polymeric Au(III) complex was then cross-linked by epichlorohydrin (ECH) before leaching the template Au(III) ions out of the cross-linked matrix. During the synthetic procedures, the obtained chitosan derivatives were characterized by Elemental analysis, FTIR and NMR spectra. Moreover, the crystalline structures along with surface morphology of the fabricated polymeric materials were investigated using X-ray diffraction (XRD) spectra and scanning electron microscope (SEM), respectively. The Au(III) ions uptake studies indicated that the adsorption process was greatly influenced by pH and followed the pseudo-second-order kinetic mechanism. Furthermore, the adsorption was endothermic and the isotherms showed the best fit with Langmuir model with qm 370±0.5 and 195±0.5 mg g-1 in case of Au-CMB and NI-CMB, respectively.


Uddhav S. Markad
Savitribai Phule Pune University, India
Title: Synthesis and application of immobilized Palladium urchin shaped nanoparticles as catalyst for detoxification of Cr(VI)

Biography: Mr.Uddhav Markad obtained his M.Sc. degree in Chemistry with specialization in Inorganic Chemistry from Savitribai Phule Pune University, in 2013. He is currently Senior Research Fellow at Department of Chemistry, S. P. Pune University Pune. He is pursuing his Ph. D. degree in the subject entitled. “Radiation and photochemical effect on removal of toxic metal ions from waste water”.

Abstract: Urchin shaped Palladium (Pdurc) nanoparticles were successfully synthesized by environment friendly radiolytic route [1]. TEM, XRD and XPS analysis indicates the formation of urchin shaped Pd(0) nanoparticles. BET analysis shows higher surface area (37.9m2/g) which is responsible for the enhanced catalytic activity. These Pdurc NP’s are used as catalyst for reduction of toxic Cr(VI) to nontoxic Cr(III). It is for the first time, that we report a synergistic effect of sun light on Pdurc catalyzed reduction of Cr(VI) to Cr(III). Rate of reaction increases nearly five-fold in presence of sunlight[2]. Use of metal nanoparticle as a catalyst has major issue of recovery and reusability of catalyst. We have therefore immobilized these nanoparticles in stable, porous, polymeric beads which can be easily recovered after completion of reaction. These Pd-PES polymeric beads can be used repeatedly up to the 100 cycles successfully without any treatment and loss of activity.


Syeda Shehwar zehra
Lahore College for Women University, Pakistan
Title: Synthesis of nanoparticles from field grown and tissue culture hordeum vulgare l.

Biography: Syeda Shehwar Zahra is a fresh graduate pursuing her post graduate program at Lahore College for Women University (Pride of Asia) in Botany. She has been working on green synthesis of nano particles from plants grown in different conditions and studied the difference in their amounts produced.

Abstract: The Potassium nanoparticles were synthesized from field and in vitro grown Hordeum vulgare L. For this purpose different concentrations of Plant Growth Regulators i.e. 2, 4- Dichlorophenoxy Acetic Acid and Benzyl amino purine were used in MS basal medium at 24±2ºC with 5.7 pH and 30% sugar. Greenish yellow callus appeared after 12 days of inoculation. Potassium nitrate solution was used for the synthesis of Potassium nanoparticles from both types of plant tissue i.e. field grown and in vitro grown. The current study concluded that in vitro grown Hordeum vulgare L. produced larger amount of Potassium nanoparticles as compared to field grown barley which was further confirmed by the results obtained from UV- Vis Spectrophotometeric analysis. Potassium nanoparticles have great utilization in composite epoxy materials industry. In vitro proliferated tissues may be a better source of synthesis of green nanoparticles in future.


Samin Mushtaq
Lahore College for Women University, Pakistan
Title: Novel silver nanoparticles of senna occidentalis l, an excellent green treatment against escherichia coli (g-) and pseudomonas aeruginosa

Biography: Samin Mushtaq is a fresh graduate currently enrolled in a post graduate program at Lahore College for Women University (Pride of Asia) in Botany. She has been working on green synthesis of nanoparticles and bioactivities shown by different nanoparticles.

Abstract: Currently nanoparticles (1-100nm in size) are considered as one of the best green tools to eliminate the infectious microorganism. Green Silver nanoparticles (AgNPs) synthesized by Senna occidentalis L. used as antibacterial agents are the focus of this study. Senna occidentalis L. is an annual shrub of family Fabaceae. The leaf extract of Senna occidentalis was prepared using crumbling dry leaves in water, methanol and n-hexane. Silver nitrate was added and kept overnight. Nanoparticles were characterized visually by observing change in color from yellow green to dark brown as well colorimetric detection of silver nanoparticles was observed by the spectrophotometeric analysis and size of nanoparticles was measured by SEM. Antibacterial activity of biosynthesized silver nanoparticles was analyzed against Escherichia coli (G-) and Pseudomonas aeruginosa (G -) by agar well diffusion method. The result revealed that Silver nanoparticles were best synthesized by using methanol as a solvent as well as they showed highest antibacterial response. The antibacterial activity was greatly affected by the size of nanoparticles. This eco friendly novel green synthesis is a facile, rapid and used for large scale production of metallic nanoparticles.


Edgar Núñez-Rojas
Universidad Autónoma Metropolitana-Iztapalapa, México
Title: Aspects and Results o a new Procedure to re-parametrize Force Fields

Biography:

Abstract: Molecular Dynamics simulations were performed in order to verify a new methodology which improves force fields. Improvement is based on modifications of specific parameters, namely, electric charge and Lennard-Jones potential parameters (εLJ and σLJ). This work was focused on adjustment of dielectric constant, surface tension and density of different molecular systems with different level description (pyiridine, methanol, room temperature ionic liquids RTIL and octane). In some cases, electric charge was modified to adjust dilectric constant, this propety has not been rewarded before to construct force fields. Infulence on density by modifications of electric charge was small compared with dielectric constant. It was found that influence on surface tension by modifications in εLJ was greater than influence observed in both density and dielectric constant, so that changing εLJ did not basically affect these properties. In the case of pyridine and mehanol it was not necessary to make changes on σLJ. This means that density of systems was obtained with the parameter taken from original force fileds. Since both RTIL and octane systems do not present a dielectric constant, methodology was only focused on Lennard-Jones parameters. In all cases a final adjustment was carried out in order to fit the studied properties. Besides, this re-parameterization allowed to fit properties such as liquid-vapor coexistence curve, self.-diffusion coefficent and surface tension in function of temperature. It was showed a methodology based on changes of specfic parameters which do not need many simulations to reach the experimental values. Mixtures properties were obtained by determining force field parameters with the mentiones procedure. Most of the force field published were no capable to reproduce results in agreement with experiments.


Fadi Ibrahim
Saad bin-alrabee alansari School Kuwait, Kuwait
Title: Smart Green Chemistry Synthesis of Microporous Material by Flow Injection method For CO2 capture

Biography:

Abstract: Carbon dioxide is thought to be one of the contributing factors in the rise of global warming. Consequently the discovery for an efficient and economically valuable gas capturing system is highly in demand. Therefore there have been various recent developments in creating new, efficient and adaptable gas capturing materials. Microporous organic based materials received great research efforts in the field of environmental related applications such as gas storage and separations due to their permanent porosity, low density (i.e. composed of light weight elements) and remarkable physicochemical stability. Three anthracene microporous polymers (AMPs)1,2 bridged by imide links were successfully prepared by conventional nucleophilic substitution reaction between different 9,10-dihydro-9,10-ethanoanthracenes and 2,3,5,6-tetrachlorophalonitrile as shown in Fig 1. AMPs display a BET surface area in the range of 711-796 m2 g–1, and adsorb reach to 1.70 wt. % H2 at 1.09 bar/77 K. The enhanced microporosity, in comparison to other organic microporous polymers originates from the macromolecular shape of framework, as dictated by the anthracene units, which helps to reduce intermolecular contact between the extended planar struts of the rigid framework. The impressive hydrogen adsorption capture of these mate-rials verified by Horvath−Kawazoe (HK) and NLDFT analyses of low-pressure nitrogen adsorption data, which expected to be use in transportation as a source of green chemistry. A novel synthesis method for AMPs was done by Flow Injection System (FIS). This method has the advantage over conventional synthesis method as saving time-solvent and lowering synthesis cost of. Optimizing conditions (sample & reagent volumes, 0.1 ml/min flow rate, with 0.5 m coil length and 0.5 mm i.d) were used for increasing percentage yield


G.N. Kozhemyakin
Russian Academy of Sciences, Russia
Title: Nanostructured bulk of thermoelectric materials

Biography:

Abstract: Bi2Te3, Bi2Se3 and Sb2Te3 compounds, and also their solid solutions are known as the most effective thermoelectric materials in the vicinity of room temperature [1]. Recently they became a focus in the study of bulk quantum topological insulators [2]. The crystals of these materials with high thermoelectric properties are generally grown by means of Bridgman, zone melting, and Czochralski techniques. The single crystals growing by Czochralski techniques have better thermoelectric properties. However, the crystals obtained these unidirectional methods have a poor mechanical strength and are very brittle due to easy cleavage in manufacturing the thermoelectric devices. The rods of these solid solutions obtained by the hot-extrusion method reach more high mechanical strength at satisfactory thermoelectric properties. In present work, we studied future of the structure of (Bi2Te3)-based solid solution bulk obtained by the hot-extrusion method (SCTB NORD, Ferrotec Corp.). p-type (Bi2Te3)x–(Sb2Te3)1 – x (x ≈ 0.26 mol%) and n-type (Bi2Se3)x–(Bi2Te3)1 – x (x ≈ 0.06 mol%) solid solutions were melted and after crystallization were ground into powder in sizes of 0.5 mm in diameter. The powder was compacted in the billets by uniaxial cold-pressing to prepare the extrusion rods of 30 mm in diameter. The rods were cut perpendicular and parallel to their axis an electrical discharge machine. The cut surfaces of these samples were ground by Al2O3 abrasive with a grain 40 μm size and then polished by chromium oxide with a grain 1 μm size. The polished surface was etched in 50% HNO3 solution. Morphology of these surfaces was studied in a Polyvar Met optical microscope and JSM 7401F scanning electronic microscopes. Artificial neural networks were employed to study the shape and sizes of the crystallites. The microstructure samples were studied under an optical microscope. The extrusion rods were the polycrystals, which had the crystallites with sizes of 1-50 µm in p-type and 1-30 µm in n-type. Most crystallites had identical orientation and the extended shape along the rod axis. We observed the nanocrystalline structure in these crystallites using an electronic microscope. The p-type solid solution contained spherical nanocrystallites with sizes of 1–30 µm. These small nanocrystallites aggregated into larger ones with sizes of 60 µm, 100 µm, and 300 µm. The crystallites of n-type are formed by interwoven fibers with different orientation. The fibers consisted of spherical nanocrystallites with sizes 10-60 nm. Small fibers aggregated into larger ones with a cross section up to several µm in size. The fibers were the length of 5-50 µm. Hot-extrusion is an effective processing method to fabricate BiSbTe and BiSeTe solid solutions with a nanocrystalline structure for mass production of thermoelectric materials.


Ahmed Alabadla
The Australian National University, Australia
Title: InP Nanowire Array Solar Cells

Biography: An axially configured p-i-n InP nanowire array solar cell device has been fabricated by implementing the commonly used photoresist as a planarization layer to support the structure while maintaining a good PV performance.

Abstract: Nanowires based on III-V compound semiconductors have been considered to have a great potential in producing high performance solar cell devices due to their unique geometrical, optical, and electrical properties. However, despite that the efficiency of nanowire solar cells has been steadily increased over the past few years, their PV performance is still considerably lagging compared to their bulk counterparts.1 One of the reasons for that is due to the challenges to uniformly plannarize and fabricate the nanowire based devices. Arrays of III-V NWs can be deployed as solar converters in a few device configurations, including axial p-i-n structures where the planarization and isolation between the top and the bottom segments of the NWs is essential. Materials, such as BCB (Benzocyclobutene), have been investigated to planarize nanowire arrays where certain criteria must be met to provide the desired device performance, including transparency for the solar spectrum, thermal stability, and possessing electrical insulation capabilities. However, upon depositing BCB, optimizing their etching to expose the required length of the NWs’ top segments usually requires the use of costly equipment such as RIE-ICP as well as toxic gases. Therefore, the process of depositing and optimizing the BCB-plannarized NW arrays have been found to be quite challenging, due to its high varicosity, and at times non-uniform and irreproducible. In this study, we propose an equally efficient planarization material that satisfies all the above criteria and, more importantly, incurs simpler, more cost effective and easily accessible optimization steps such as Oxygen plasma etching. Arrays of axial p-i-n InP nanowires, produced using metal organic vapor phase epitaxy – selective area epitaxy (MOVPE-SAE) growth technique2 and grown on a p+ InP substrate, have been planarized by the commonly used photoresist AZ5214 via spin coating, where Oxygen plasma is, thereafter, used to etch back the resist exposing the desired length of the NWs’ top n type segments. After the deposition of the front and back contacts, as can be seen in Fig.1 a power conversion efficiency (PCE) of 10.65% has been obtained. It shows that a common photoresist such as AZ5214 is indeed effective as a planarization layer for NW arrays as a simple and effective method for NW solar cells device fabrication, where further studies of the various design and characterization parameters can now be easily pursued.


Nassira Ferroudj
Laboratoire de Génie Chimique et Environnement de Skikda, Algeria
Title: Improving heterogeneous magnetic Fenton catalytic degradation of aqueous dyes with a simple halogen visible lamp through Iron-Oxide/Silica Nanocomposites

Biography:

Abstract: The incapability of the conventional wastewater treatment methods to effectively remove many toxic pollutants stands for the development of new treatment systems. In this field, Advanced Oxidation Processes (AOPs) are becoming increasingly important, especially for the degradation of a large number of hazardous and recalcitrant organic pollutants. Among them, the Photo-Fenton process is considered as one of the most efficient AOPs. Although the photo-Fenton process is also efficient in homogeneous phase, the use of a heterogeneous catalyst provides the possibility to recover and reuse the catalyst and to operate in a broader pH range [1-2]. One of the challenges in this field is to develop heterogeneous catalysts which efficiently use visible light irradiation instead of UV light. Iron oxides are suitable candidates to be used as visible-light photo-Fenton catalysts for water treatment [3]. In this work, we report the degradation of various model organic pollutants, especially dyes, by the photo-Fenton process under the visible light emitted by a simple halogen lamp, in presence of heterogeneous catalysts based on maghemite (γ-Fe2O3) nanoparticles. These catalysts have a strong magnetic susceptibility, which makes them easily recoverable by applying a magnetic field gradient generated by a magnet or an electromagnet. Two catalysts were tested, depending on whether the γ-Fe2O3 nanoparticles were used dispersed in water, or supported on the internal surface of silica microspheres. The two catalytic materials were fully characterized. The degradation of the pollutants was always followed both by UV-visible spectroscopy (which measures the decolorization of the solutions), and NPOC analysis (which measures the mineralization of the solutions). The catalytic activity under visible light (photo-Fenton process) was systematically compared to its counterpart in the dark (Fenton process). Experiments of long-term stability showed that the MS catalyst, although generally less active than the NP catalyst, retained almost all of its activity after five repeated experiments under visible light. The good stability of this catalyst was also confirmed by the low level of iron leaching, making it suitable candidate for an application as photo-Fenton catalyst in industrial wastewater treatment.


David Mutegi Marikah
Jomo Kenyatta University of Agriculture and Technology, Kenya
Title: Novel Materials from Clay and Functionalized Clay Nanoparticles: Application in Remediation of Lead, Cadmium and Pentachlorophenol from Water

Biography:

Abstract: Abstract— The importance of water purification especially removal of both organic and inorganic contaminants cannot be overemphasized, hence the need to develop water purification materials that are cheap, easily available and efficient. This would ensure realization of the Clean Water and Sanitation Sustainable Development Goal (SDGs). The current study involves isolation of clay nanoparticles (CNP) and functionalizing them with Cetylpyridinium Chloride (CPC) and Tetradecyltrimethylammonium Bromide (TTAB) to form C-CPC and C-TTAB respectively, so as to increase efficiency in removal of lead, cadmium and pentachlorophenol (PCP) through batch process. Clay was acquired locally, purified and CNP isolated by sedimentation and centrifugation. The CNP, C-CPC and C-TTAB were characterized using Fourier Transform Infra-Red (FTIR) spectroscopy, X-Ray Diffractometry (XRD), Scanning Electron Microscopy (SEM) and High Resolution Transmission Electron Microscopy (HRTEM). HRTEM revealed a particle size of 12-15 nm for the three adsorbents. CNP had a lead removal efficiency of 88% at initial concentration of 80 ppm and 94% for Cadmium at initial concentration of 50 ppm, while C-CPC and C-TTAB had lead removal efficiencies of 98%. For cadmium removal, C-CPC and C-TTAB had 98.2% and 98.6% efficiencies respectively. In pentachlorophenol (PCP) adsorption, CNP, C-CPC and C-TTAB had removal efficiencies of 85.6%, 87.7% and 84.6% respectively. The findings suggest that isolation of CNP and consequent modification with the surfactants increases adsorption efficiency of clay against the water pollutants.


Hyma Ponnaganti
St Pauls College of Pharmacy, India
Title: Formulation and evaluation of niosomes of diclofenac sodium

Biography:

Abstract: The present research article is aimed at formulation of niosomes of dilcofenac sodium .Niosomes are sphere shaped vesicles containing one or more phospholipid bilayer, they are usually used to maintain drugs for a prolonged period of time and increase the bioavailability of the drug. The drug diclofenac has plasma half life of 2-3 hrs which requires frequent dosing of the drug. Niosomes were produced by thin film hydration technique using cholesterol, span 80. The drug excipient studies were done by FTIR and the surface morphology was analysed by SEM studies. The in vitro diffusion studies has shown the prolonged release of the drug confirming the sustained effect of niosomes.


HamedAlshammari
Ha'il University, Saudi Arabia
Title: Catalytic activity of bimetallic AuPd alloys supported MgO and MnO2 nanostructures and their role in selective aerobic oxidation of alcohols

Biography:

Abstract: The use of metal oxides as supports for gold and palladium (Au-Pd) nanoalloys constitutes new horizons to improve new active catalysts in very important reactions. From the literatures, Pd-based bimetallic nanostructures have great properties and active catalytic performance. In this study, nanostructures of Magnesium oxide (MgO) and nano Manganese dioxide (MnO₂) were synthesised and utilized as supports for Au-Pd nanoparticles catalysts. Gold and palladium were deposited on these supports using sol-immobilisation method. The MgO and MnO2 supported Au-Pd catalysts were evaluated for the oxidation of benzyl alcohol, aliphatic, aromatic alcohols and 1-octanol, respectively. This catalyst was found to be selective, active and reusable than the corresponding monometallic Au and Pd catalysts. The outcomes of this work shed light on the selective aerobic oxidation of alcohols using bimetallic Au-Pd nanoalloys and pave the way to a complete investigation of more basic metal oxides for various aliphatic alcohols.


Nanotechnology Congress 2017 | by: Scientific Future Group