E-mail: contact@worldnanoconference.com | USA : +1-646-828-7579, UK : +44-203-695-1242 | April 05-07, 2017, Barcelona, Spain  

POSTER PRESENTATIONS

Ewa Kijeńska
Warsaw University of Technology, Poland
Title: Electrospinning and characterization of biodegradable polyester based polyurethane nanofibers for cardiovascular applications

Biography: Ewa Kijeńska Ph.D. M.Sc. Eng.- Ph.D. in Materials Science and Engineering from Faculty of Materials Science and Engineering, Master Degree in Industrial Biotechnology from Faculty of Chemical and Process Engineering at Warsaw University of Technology. She is coordinating electrospinning related research within Biomaterials Group at Faculty of Materials Science and Engineering at Warsaw University of Technology. Her research focus mainly on fabrication, physicochemical and mechanical characterization along with in vitro and in vivo studies of electrospun fibers for tissue engineering application.

Abstract: Tissue engineered scaffolds and drug delivery carriers with porous structures and shape memory properties are highly promising substrates for cardiovascular applications. In presented study , a novel shape memory polyurethane based on caprolactone (CL) oligomers with different molecular weight was synthesized. For this, one-shot process using 1,6-hexamethylene diisocyanate (HMDI) as a coupling agent and catalyst, and 1,4 – butanediol as low molecular weight chain extender was performed. Next, electrospinning of versatile solution in range of 10% to 22% was conducted, aiming to obtain nanofibrous meshes with different diameter of fibers. The correlation between diameter and polymer solution concentration was obtained. Furthermore, in order to determine the influence of the thickness of the fibers on physiochemical properties, shape memory effect and cell-material interactions,the selected parameters were chosen and three types of nanofibrous scaffolds were fabricated. HUVEC cells cultured on the polyurethane meshes showed good biocompatibility by promoting cell expansion and proliferation. The obtained results indicate, that there is no significant effect of the diameter of the fibers on the surface properties and shape memory effect of the polyurethane nanofibrous meshes. This opens new promising path of development of nanofibrous meshes with shape memory effect composed of fibers with versatile diameters, preventing the main disadvantage of electrospun nanofibrous meshes in biomedical applications – the small size of its pores.


L.C. Tsao
Pingtung University of Science & Technology, Taiwan
Title: Effect of TiO2 nanoparticles on the corrosion property of novel Sn3.5Ag0.5Bi solders

Biography: Professor L. C. Tsao is an internationally known nano-composite solder. He served as Director of the Graduate institute of Materials Engineering at National Pingtung University of science and Technology, Taiwan. He is interested in investigation of Biomaterials and Jewelry. He had published over 60 papers in reputed journals and have 30 international and Taiwan patents.

Abstract: Recently, much interest has been shown on nano-composite lead-free solder because of excellent mechanical property reasons as compared to lead-free solder. The lead-free Sn3.5Ag0.5Bi composite solder was produced by mechanically mixing 0.5 wt.% TiO2 nanoparticles with Sn3.5Ag0.5Bi solder. The corrosion behavior of the new Sn3.5Ag0.5Bi nano-composite solder in 3.5 wt.% NaCl solution was investigated by using potentiodynamic polarization methods. The corrosion products formed during the polarization study were analyzed with scanning electron microscopy (SEM) and X-ray diffraction. Potentiodynamic polarization curves show that the new Sn3.5Ag0.5Bi nano-composite solder exhibits better corrosion resistance than Sn3.5Ag0.5Bi solder. The corrosion product on the surface of all these solders was tin oxide chloride hydroxide.


Yi-Feng Lin
Chung Yuan Christian University, Chungli, Taoyuan, Taiwan
Title: Nanoporous Silica Aerogel Membranes for CO2 Capture

Biography: Dr. Yi-Feng Lin is the Full professor of Department of Chemical Engineering and the Chairman of Enterprise and Licensing Transfer Center in Chung Yuan Christian University. His research field focuses on nanoporous materials, such as mesoporous aerogels and microporous metal-organic framework, for environmental and catalytic applications in CO2 capture, solvent separation, wastewater treatment and CO2 catalytic reactions.

Abstract: The use of a membrane contactor combined with a hydrophobic porous membrane and amine absorbent has attracted considerable attention for the capture of CO2 due to its extensive use, low operational costs and low energy consumption. The hydrophobic porous membrane interface prevents the passage of the amine absorbent while allowing the penetration of CO2 molecules absorbed by the amine absorbent. Herein, for the first time, highly mesoporous and water-repellent SiO2 aerogels were successfully coated onto a macroporous Al2O3 membrane using different silanol precursors, such as tetraethyl orthosilicate (TEOS), methyltrimethoxysilane (MTMS) and bis(triethoxysilyl) ethane (BETES). The silica-based hydrophobic SiO2 aerogel membranes exhibited much higher CO2 absorption flux than the uncoated silica-based aerogel membranes and could be reused and continuously operated for CO2 absorption for extended periods of time. As a result, silica-based water-repellent aerogel membrane contactors are a promising technology for large-scale CO2 absorption post-combustion in power plants.


Ewa Adamiec
AGH University of Science and Technology, Poland
Title: Nanotechnology in automotive industry as a pollution sources of road environments

Biography:

Abstract: Restrictive environmental requirements and consumer lifestyle have supported rapid progress in automotive industry. Numerous new materials and products that contains RREs are introduced into the automotive industry marketplace. Over span of two decades increasing attention is given to hybrid electric vehicles (HEV). Critical metals are essential constituents of many vehicle components. Alonso et al. [1] showed that a HEV contained a total of 3.5 kg REEs in NiMH battery and 0.6 kg in hybrid transmission, with only 0.4 kg in the remaining components. Production of an electric car is currently not possible without neodymium and dysprosium, which are both important components of the magnets used in the engine [2]. RREs are essential constituents of many electrical and electronic products as well as are used in petroleum industry as diesel fuel additives. RREs are widely used in LCD screen production, as sensors components as well as UV and headlight glass production and as glass and mirrors polishing powder in automotive industry. Platinum group elements (PGEs) and rare earth elements (REEs) are being extensively used as components of automobile catalytic convertors. Thermal and mechanical attrition leads to breakdown of the catalyst and release of PGE containing ultra-fine particles into different environmental compartments. PGE has been reported to bioaccumulate in the environment and cause allergic reactions and various health problems to humans such as asthma, nausea, hair loss, abortion, dermatitis and other health problems [2]. The main objective of the study was to evaluate the contamination with metals of various road environment samples in urban area from four biggest and congested cities in Poland (Warsaw, Krakow, Wrocław and Opole). Total of 132 road environment samples were collected that is road sediment, sludge form storm drains as well as roadside topsoil and were analysed using ICP-MS. The highest levels of Pt, Rh, Pd, Ru, Ir, Ce, Zr, Y and Os were found in road dusts as well as in sludge form storm drains. The concentrations of the majority of these elements were significantly elevated when compared with the concentrations found in samples from relatively traffic-unpolluted areas. Significant correlation of between elements indicate and identify traffic as the main sources of analyzed elements. Catalyst related platinum group elements mainly Pd, Rh, rare earth elements (Ce, Y) and Ir, Os, Zr, As seem to be the important indicator of the relocation occurring with road-specific metals bound in solid phase and provide relevant information about anthropogenic (traffic) metal pollution in urban environment.


Alberto Coelho
1Centro Singular de Investigación en Química Biológica y Materiales Moleculares, Spain
Title: 3D Printing in Catalysis: Combining 3D heterogeneous Copper and Palladium Catalysts for Multicatalytic Multicomponent Reactions

Biography: Prof. Alberto Coelho is doctorate in Pharmacy by University of Santiago de Compostela (2003). His post-doctoral experience has been developed in projects of public multidisciplinary research and private companys in more than 20 national projects (2 as a principal investigator). Is author of about 50 scientific papers in leading journals in the areas of Medicinal Chemistry, Combinatorial Chemistry and Catalysis. He is currently Associate Professor at the University of Santiago de Compostela (Department of Organic Chemistry) and he currently leads a project focused on finding new materials using 3D printing with applications in complex catalytic solution phase transformations.

Abstract: Developing three-dimensional monolithic hybrid heterogeneous catalysts with multiple active sites, integrating metal centres that may act in a coordinative fashion for catalysing multicatalytic multicomponent reactions, as well as designing sequential reactions using multiple catalysts in the same reaction vessel with eco-friendly conditions are ambitious challenges in the context of a sustainable chemistry. However, this overall objective of a sustainable approach is not only achievable through the discovery of new recoverable solid heterogeneous catalysts based on new materials, but also through the synergistic application of these devices in modular, robust and efficient chemical transformations, preferibly under mild conditions, using green solvents and minimizing toxic byproducts as posible. Two paradigms of efficient catalytic type reactions are constituted by the CuAAC (the flagship of the so called “click chemistry”) as well as the palladium catalyzed cross coupling reactions (PCCCR). In connection with this line of thinking based on the use of efficient transformations, the multicomponent reactions (MCRs) [ref] are positioned as powerful chemical methodologies and are defined as processes that occur in one reaction vessel and involve more than two starting reagents that form a single product which contains the essential parts of the starting materials. Within this kind of transformations, are particularly challenging the Multicatalytic Multicomponent Reactions (MMCRs), where two or more catalysts are present from the onset of the reaction that operates independently and in a consecutive manner. In this work, we performed the synthesis of two reusable new silica-based Pd and Cu heterogeneous woodpile shaped catalysts by 3D printing and a further surface functionalization and evaluation of their catalytic activity in new designed one pot CuAAC+Sonogashira, CuAAC+Stille or CuAAC+Suzuki MMCRs.


Ommeaymen Sheikhnejad
Johannes Kepler Universität Linz, Austria
Title: A molecular dynamics simulation study of the structural and mechanical properties of nanoparticle – reinforced acrylate composites

Biography: I received my B.Sc. and M.Sc. degrees (Pure Chemistry, 2004 - Physical Chemistry, 2007) from University of Mazandaran - Babolsar, Iran. Then, I joined Harbin Institute of Technology (one of the top 10-highest ranking universities in China) to pursue my Ph.D. degree in Chemical Engineering and Technology (2009). Afterward, I moved to Austria serving as Postdoctoral Research Fellow of the Institute of Polymer Product Engineering (IPPE) in Johannes Kepler University since October 2015. Selected honors include a Ph.D. Research scholarship (CSC scholarship of Chinese government), IRAN NANOTECHNOLOGY INITIATIVE COUNCIL (INIC) Award; Financial support for Nanotechnology research (For M.Sc. Thesis), and Diligent Undergraduate Student. I have already published several papers during my M.Sc. and Ph.D. studying. To keep this biography short, I have left out my publications and a number of ideas I have been involved to work.

Abstract: Pure polymer materials are not mechanically strong, but they can be reinforced when mixed with solid objects. Nanoparticles are important additives for altering and enhancing the properties of polymers. Nanoparticle reinforced composites with unique properties have been produced due to their excellent mechanical properties, greater reactive surface area per unit volume [1] and superior physical and chemical properties in composites structures [2]. Recent experimental analysis has revealed that the properties of the nanocomposites are strongly influenced by the dispersed structure of nano fillers. However, in some cases, it is not possible to study the effect of fillers dispersion in the mixing process and the physical properties of those materials with experimental work but simulation studies are thus expected. In this work, molecular dynamics simulation (MD) were performed on a model polymer- nanoparticle composite consisting of silica nanoparticles in acrylate based polymer.The MD simulation technique is described the structural mechanics applications, evaluating the static and dynamic characteristics of materials from the atomic/molecular level and providing a fundamental understanding of atomic approach. We conducted MD runs using COGNAC in J-OCTA package.Molecular models of silica nanoparticleswith different dispersion structures in acrylate based polymer have been simulated in J-OCTA in order to generate the most stable system. Moreover, in this study the stress-strain behavior of polymer- nanoparticle composite generated from molecular dynamics simulation is also presented.


Monika Bil
Warsaw University of Technology, Poland
Title: In vitro characterization of drug eluting and shape -memory polymer networks for cardiovascular applications

Biography: Monika Bil got her PhD in Materials Science from Warsaw University of Technology in 2009. Currently she works at Faculty of Materials Science and Engineering, Warsaw University of Technology in Biomaterials Group. Her research is focused on polymer synthesis for biomedical applications, shape memory polymers, biomaterials characterization and processing

Abstract: The unique attributes of shape memory effect in conjunction with biodegradability and drug delivery offer enormous opportunities for the design of next generation drug delivery stents that will significantly reduce of restenosis and thrombosis. A crucial factors affecting clinical functionality are tailored mechanical properties, shape memory effect and drug kinetics and release mechanisms. In this work two compositions of polyurethanes that differ in terms of hydrophilicity were developed as carrier for paclitaxel and sirolimus and release mechanism was analyzed in vitro. Polyurethanes based on caprolactone (CL) with different molecular weight, PLGA and PEG oligomers were synthesized in one-shot process using 1, 6-hexamethylene diisocyanate (HMDI) as a coupling agent and a catalyst. Using of PEG oligomer hydrophilicity of polyurethane matrix was modified. Next polymers solutions with 1% (wt.) of paclitaxel or sirolimus were prepared and nanofiber networks were prepared by electrospinning process. Chemical structure was characterized by FTIR, fiber structure was characterized by SEM and shape memory properties were determined using a dynamic mechanical analyzer (DMA). The in vitro degradation and drug release study were conducted at 37o C in PBS (pH 7.4) with Tween 20 and UV Vis spectroscopy was applied to analyze the amount of released paclitaxel and sirolimus. The obtained results revealed that release profile can be effectively modulated by changing hydrophilicity of polyurethane matrix. By using mixture of oligomers with various hydrophilicity and mechanical properties, it is possible to control release profile without significant changing of shape memory effect.


Chechia Hu
Chung Yuan Christian University, Taiwan
Title: Structure characterization of SrTiO3 synthesized from hydrothermal method and its photocatalytic activity enhancement through coupling of graphene oxide

Biography: Che-Chia Hu received his B.S. degree in Chemical Engineering from Chung Yuan Christian University, Taiwan and his Ph.D. degree in Chemical Engineering from National Cheng Kung University, Taiwan, in 2010. Dr. Hu joined the Department of Chemical Engineering of Chung Yuan Christian University in 2015 as an Assistant Professor. He was a research chemist in Eternal Chemicals Co., and Taiwan Textile Research Institute during 2011 to 2013 and 2013 to 2015, respectively. His research interests include the synthesis and hybridization of metal oxide and carbon-related photocatalysts and their applications on photocatalytic degradation and waste water treatment, and photocatalytic water splitting for H2 and O2 generation

Abstract: Photocatalytic wastewater treatment using solar energy has attracted considerable attention in recent years. In this study, titanate-based derivates synthesized from the hydrothermal method with various pH values were used as the precursors to prepare perovskite-type SrTiO3 samples with a following second-hydrothermal mehtod. X-ray diffraction analysis showed that the SrTiO3 samples can be assigned to pure perovskite SrTiO3 structure. These samples displayed optical absorption edges at approximately at 395 nm, indicating that they can be activated with UV light. Scanning electron microscope (SEM) analyses revealed that the morphologies of SrTiO3, which synthesized from different titanate-based precursors, were different ( i.e., pH-dependent morphology). Several common dye solutions including methylene orange, methyl blue, and rhodamine B were photocatalytically degraded using the above SrTiO3 samples under UV light irradiation. To further extend the visible light absorption of these samples, graphene oxide (GO) was copuled with SrTiO3 as a composite. GO/SrTiO3 showed not only an enhanced photocatlaytic activity to degrade the above dye solutions, but also an extension of light absorption to the visible light regime. In this study, SrTiO3 with pH-dependent morphologies were prepared. After coupling with GO, GO/SrTiO3 exhibited an improved light extension and photocatalytic activity to decompose organic dye including methylene orange, methyl blue, and rhodamine B solutions. These results indicate that GO/SrTiO3 can be a promising photocatalyst for wastewater treatment.


Yeon Joo Jeong
National Nanotechnology Policy Center(NNPC), South korea
Title: Job Creation Effect of Nanotechnology in South Korea

Biography: YeonJooJeong is a senior researcher of National Nanotechnology Policy Center(NNPC) at the Korea Institute of Science and Technology Information(KISTI) in South Korea. She received her Ph.D. degree in Materials Science & Engineering at the Carnegie Mellon University. Her research focuses are on the carbon nanotube aerogel composite materials. Her another research interests are national nanotechnology policy and their effects on various fields.

Abstract: The investment in nanotechnology continuousely increases around the world since nanotechnology is a convergence technology and a foundation technology applied to all industrial fields. The government R&D investment in South Korea also increases steadily, particularly there is a growing interest in the policy support for job training among several key business. In this research, we quantitaively analyze how government R&D investment in nanotechnology, which has been intensively invested for a long time, affects job creation. In order to derive a suitable method for the quantitative analysis, we studied several previous research and various methods, such as regression analysis model, micro-economic model, macro-economic model, optimal model, survey based or DEFRA model. Because of several challenges based on those previous models, which difficult to obtain validity, data, or to select range of variables, etc., we use an inter-industry analysis, which is a proper model for job creation effect evaluation. Here, macro-economic dynamics, including the multiplier effect and the crowding out effect of fiscal spending, should be reflected. As a result of various fiscal spending list being affected by the spread of each industry, we analyze industrial output, extra value and job creation effects. For this evaluation, input-output(I/O) model is suggested to analyze inter-industry, which is easy to analyze indirect effects such as job creation effect by using inter-industry table. Although it is a static analysis, the I/O model is the most appropriate method for measuring the job creation effect of nanotechnology. By utilizing ‘2010 total I/O table, first we reclassify and reconstruct nano-convergence industry. Then, we establish revised I/O table of nano-convergence industry, and calculate various multiplier and coefficient. By deriving a job creation coefficient and backward/forward linkage effects, etc., job creation effect of nano-convergence industry can be analyzed quantitatively. It is expected that nanotechnology would positively affect job creation, and the method we use would be applied to analyze global job creation effect of nanotehcnology.


Engang Wang
Northeastern University, P. R. China
Title: Influence of Nano-Ag precipitation on properties of high-strength and high-conductivity Cu-7.9wt%Ag alloy

Biography: Professor and Vice director of Key Laboratory of Electromagnetic Processing of Materials (EPM), Northeastern University, P. R. China. His research focuses are on the metal material science with high magnetic fields and alloy solidification especially with different electromagnetic fields.

Abstract: Cu-Ag alloy with high-strength and high-conductivity is very important materials as conductors in both DC resistive and pulsed high-field magnets with the increasing requirement of high-field magnets. In this paper, we established the relationships of strengthening and resistivity with micro-structural characterization, and thought that nano-Ag precipitation played an important roles in the optimization of properties. Ag precipitation in Cu matrix and its effect on the strength and electrical conductivity were discussed. The hardness, mechanical strength, ductility, and electrical conductivity of Cu-7.9wt%Ag alloy were investigated after heat treatment with different time and temperature. The discontinuous and continuous Ag precipitation phenomena were shown by differential scanning calorimetry (DSC) to correspond to two distinct exothermic reactions in this alloy. Activation energy was found to be 63.7±0.1 kJ/mol for discontinuous and 68.7±2.3 kJ/mol for continuous Ag precipitation. At higher temperatures (450˚C-580˚C), both continuous and discontinuous Ag nano-precipitation occurred, but at lower temperatures (410˚C), only discontinuous precipitation was observed. A kind of cube-on-cube relationship was observed between Ag precipites and Cu matrix. Two kinds of interface between Ag precipites and Cu matrix were observed. One is (1-11)Cu/(1-11)Ag flat interface, and another one is step-like interface which was consisted of (1-11) and (11-1). Coherent {111} twin boundaries or 60˚ misfit dislocation network were found in some of Ag precipitates. Because of higher density and very fine continuous precipitates, the microhardness and tensile strength of the sample aged at 475˚C was up to 22% higher than samples aged at other temperatures (e.g. 170˚C, 410˚C, 580˚C, and 680˚C). Optimized microstructure also enhances the ductility in addition to the tensile strength and the hardness. Because the formation of precipitates reduces Ag dissolved in Cu matrix, the electrical resistivity of aged samples began to decrease above 410˚C. The size, volume fraction, and spacing of continuous Ag precipitates apparently play important roles in maximization of total strength and electrical resistivity.


O.E. Glukhova
Saratov State University, Russia
Title: THz-nanodetector on the Base of Hybrid Carbon Nanostructure

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: The new theoretical model of terahertz nanodetector on the base of carbon compound is proposed. Physical principle of terahertz radiation detection is the phenomena of interaction between hybrid nanostructure and incident electromagnetic wave. To fix electromagnetic wave a sharp change of tube conductivity measured by external device should be provided. The paper suggests the possibility of such sharp drop creation. Atomistic model of detector is created. It represents the free fullerene C60 inside the nanotube (10, 10) containing trimer of the fullerenes C60 covalently bonded with walls of the tube. It’s predicted that under external electromagnetic wave a carbon nanotube would lose relatively big charge. Thus, a value of changing conductivity can be easily measured by external device. To check this hypothesis a number of numerous experiments was performed. It revealed the patterns of the free fullerene C60 behavior inside the carbon nanopeapod. All simulations were performed by software KVAZAR [1]. Due to quantum method DFTB [2] it was calculated a transmission function and volt-ampere characteristics of hybrid carbon nanostructure with different distances between the tube wall and the free fullerene C60. It was established the influence of nanotubes packing density and features of external electromagnetic field (frequency, strength) on the value of measured drop in carbon structure conductivity.


Olga E. Glukhova
Saratov State University, Russia
Title: A new way to control the electronic properties of graphene nanoribbons by changing the concentration of epoxy groups and their configuration

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: We numerically investigate the impact of epoxide adsorbates on the transport properties of zigzag graphene nanoribbons using the density functional tight binding (DFTB) method [1] in combination with the nonequilibrium Green’s function method [2,3]. We considered graphene nanoribbons with widths of 5 (5-ZGNR), 7 (7-ZGNR) and 14 (14-ZGNR) hexagons. For the every case of width we investigated a lot of configurations with randomly located epoxide adsorbates on a ZGNR surface with a different concentration of adsorbates ranging from 0% to 6%. It was found that the zero-bias conductances for 5-ZGNR and 7-ZGNR depend largely on the location of epoxy groups than on their concentration. In contrast, it was found that the conductance of 14-ZGNR depends largely on the concentration of epoxy groups. This means that it is possible to use the value of the concentration of epoxy groups to control the conductance for a wide ZGNR (wider that 14 hexagons). It was also found that the presence of linearly ordered epoxy groups leads to a marked decrease in the conductivity. We revealed a special case of the location of epoxy groups that leads to a zero transmission function of ZGNR for a wide range of energy. Moreover, the linearly ordered epoxy groups have a much greater impact on the conductance than disordered epoxy groups. This feature can also be used to control the ZGNR conductance even at high concentration of disordered epoxy groups.


Seung Woo Lee
Chung-Ang University, Republic of Korea
Title: A rapid tuberculosis detection by antigen-antibody interaction based on fluorescence assays using nanomaterials

Biography: Tae Jung Park received Ph. D. degree at the department of chemical & biomolecular engineering of KAIST in 2004. He was a research professor and a chief researcher at KAIST. He is currently an associate professor at the chemistry department of Chung-Ang University from 2012. His research interests are novel platform technologies for the nanobio-fusion studies on the metal surface, biosensor chip and nanocomplex fabrication for electrochemical analysis. Furthermore, he is interested in an investigation of molecular diagnostics using nanomaterials and an evaluation for the Biomimetics and Drug Delivery Systems. He received over 10 Best Research Awards and published over 120 papers, and holds over 80 international and Korean patents.

Abstract: Tuberculosis (TB) is an infectious disease caused by bacteria called Mycobacterium tuberculosis (MTB) and M. bovis (BTB). TB is highly infectious as it affects the lungs and spread through the air. To prevent TB spreading, a facile and sensitive method is required for its early diagnosis. In this study, three different mycobacterial proteins, Ag85B, CFP10 and MBP70 secreted by MTB or BTB were used as target antigens. In this study, sandwich assays were performed using the three antigens and two different types of specific antibodies against each antigen. As detection probes, gold nanorods (AuNRs) and quantum dots (QDs) were used. AuNRs were used for its biocompatibility and unique optical properties, and QDs were used for its high fluorescence intensity and long stability period compared with organic dyes. These nanomaterials conjugated with antibodies in buffer solution interact with a specific target antigen through a strong binding affinity giving a sandwich reaction. With this Methods, TB can easily be detected at a low-cost and short reaction time.


Melanie Timpel
Institute of Materials for Electronics and Magnetism - National Research Council, Italy
Title: Wet-chemical functionalization of SiC/SiOx core/shell nanowires: new routes to create oxidative stress-generating nanomaterials with tailored functionalities

Biography: Dr. M. Timpel is a Postdoctoral Fellow at the Institute of Materials for Electronics and Magnetism - National Research Council in Trento (Italy). She received her PhD degree at the Institute of Applied Materials of the Helmholtz-Zentrum Berlin (Germany). Her recent research activities focus on surface functionalization and characterization of inorganic nanostructures for biomedical applications. Her research activities are supported by a Feodor-Lynen-Fellowship of the Alexander v. Humboldt foundation, Bonn (Germany).

Abstract: Recent research has shown that functionalization of nanomaterials by attaching light-sensitive molecules (photosensitizers) such as porphyrins gives rise to unique oxidative stress-generating properties under X-ray exposure [1]. In nanomedicine-based therapies, these intrinsic properties can be potentially explored to induce tumor cell death without the need for chemotherapy. One highly appealing material that can be used as X-ray absorbers (scintillators) are SiC/SiOx core/shell nanowires (NWs), where a shell-induced enhancement of the optical emission due to quantum confinement effects confers unique optical properties [2]. Although NW biocompatibility [3a], successful functionalization and oxidative stress generation by functionalized NWs have been already demonstrated [3b], many issues must be adressed to ensure their future clinical application. For instance, photosensitizer loading strategies have to be optimized to create highly stable nanomaterials for in vivo applications, and strategies to achieve tumor targeting have to be explored. In the present work, two different tetraphenyl porphyrins (TPP) have been chosen to functionalize the NWs and to address the above-mentioned aims: 1. TPPs with phosphonic acid (PA) anchoring groups have been synthesized to combine the advantageous properties of the robust PA binding with metal oxides such as the NWs’ SiOx shell; 2. TPP with amino (NH2) ending groups and their subsequent binding to folic acid is used in order to specifically target cancer cells that overexpress the folate receptor. The synthesis and characterization of the optical and electronic properties of functionalized NWs will be presented herein. Our findings provide new insights in developing effective strategies to wet-chemical functionalization of SiC/SiOx core/shell nanowires.


Al eum Jeong
Kumoh National Institute of Technology, South Korea
Title: Photo-thermal Effect of Integrated Gold Nanorods and Iron Oxide on Graphene Oxide

Biography: Al eum Jeong received her B.Sc degree in Applied Chemistry in Kumoh National Institute of Technology (KIT), Korea and currently a M.Sc degree student in Kumoh National Institute of Technology (KIT), Korea. Her research focus is on multifunctional nanoparticles in biomedical applications. She is also interested in Gold nanoparticle in cosmetics.

Abstract: Recently, anisotropically grown gold nanorod (GNR) along the [001] direction has been extensively studied due to its biocompatibility and excellent plasmonic responses. In particular, longitudinal surface plasmon resonance (LSPR) of free electrons along the elongated axis of the GNR can be quickly converted to thermal energy through the lattice collisions, a feature that has recently been recognized to be highly promising for cancer therapy. However, based on the penetration-depth limit of the laser source, the irradiation may be attenuated by adsorption and scattering processes in the tissue. Therefore, GNR-based photothermal studies have focused primarily on near-tissue diseases such as melanoma and breast cancer. In this regard, enhancement of the photothermal conversion efficiency of GNR is mandatory for further progress of photothermal therapy. Nevertheless, relatively little research has been conducted in this direction. The ultimate goal of the present study is to investigate the photothermal effect of a GNR assembly integrated into a graphene oxide (GO) nanosheet, which is an ideal substrate material for meeting our objective because of its high thermal conductivity (~5,000 Wm-1K-1) and high optical transmittance (~97.7%). Furthermore, covalent conjugation of the GO-GNR nanohybrid structures with silica-coated iron oxide (Fe3O4@SiO2) allows recycling of the GO-IO-GNR composites. As anticipated, magnetic separation of the GO-IO-GNR assembly brings about a local photothermal effect in the target site, which is demonstrated herein.


Huei -Ting Chien
Institute of Solid State Physics, Graz University of Technology, Austria
Title: Short Term Environmental Effects and their Influence on Spatial Homogeneity of Organic Solar Cell Functionality

Biography: Currently, Huei-Ting Chien is a PhD student and research assistant in the Institute of Solid State Physics of Graz University of Technology in Austria. She received the M.S. degree in Department of Chemical Engineering from National Cheng Kung University in Taiwan in 2009. She worked as process engineer in Taiwan Semiconductor Manufacturing Company until 2014. Her current research focuses on the investigation of spatial homogeneity and stability of organic solar cells.

Abstract: Organic photovoltaic cells (OPVs) have received considerable attention as potential source of renewable energy for their advantages as easy fabrication, light weight, low manufacturing cost and mechanical flexibility. However, irreproducibility and spatial inhomogeneity are serious issues in OPVs. Environmental effects such as oxygen, light and humidity are suspected to be responsible for the degradation of particular components, leading to poor stability and life time. In organic devices using blends of donor and acceptor as photoactive layer, charge selective layers near the electrode are inevitable. A most prominent material for this purpose is the hole-transporter (HT) poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) and known itself to generate spatial inhomogeneity, instability and shorter life time of devices due to its colloidal form, acidity and hygroscopic character. In this study, we would like to highlight the main reasons for induced degradation and spatial inhomogeneity of OPV devices under different environmental conditions, uncoupled from the influence of an HT layer. During testing of according devices based on standard photoactive layer of poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PC60BM), a comparison was made between the use of argon, dry air, dry air with light and humidity. The photophysics of the active layer, device physics, and spatial photocurrent distribution are discussed, accompanied by point-to-point analysis of the origin of the observed OPV device performance. The results show that even without PEDOT: PSS the major degradation source from short term environmental exposure of organic solar cells is humidity, caused by diffusion of water into the metal electrode and formation of charge transfer barriers between metal electrode and active layer, while the organic active layer stays unharmed.


Claudio Cara
Università di Cagliari, Italy
Title: Mesostructured Fe2O3@ MCM41 sorbents for mid-temperature H2S removal

Biography: Claudio Cara graduated in Chemical Science in 2014 at University of Cagliari with highest mark presenting the thesis “Development of a new solvothermal synthetic strategy for obtaining colloidal magnetite nanoparticles”, developed at the University of Cagliari under the supervision of Prof. Carla Cannas. From November 2014, he is a PhD student in Chemical Sciences and Technologies at the University of Cagliari working on the design of siliceous and non-siliceous mesoporous nanosystems for environmental and energy application under the supervision of Prof. Carla Cannas. In 2015 he served an internship on the development of iron alkoxides as precursors in EISA synthetic approach at the Nuclear Research Institute, Prague, under the supervision of Prof. Josef Bursik. In 2016 he conducted an internship focused on the use of double hydrophilic copolymer to obtain mesoporous highly crystalline titania at the Max Planck Institute of Potsdam, under the supervision of Dr. Bernhard Schmidt and Prof. Markus Antonietti.

Abstract: Hydrogen sulphide is one of the most noxious industrial gases as both air pollutant and powerful catalyst poison of many processes, and its concentration in feedstocks should be kept lower than 150 ppm before its use in IGCC systems [1]. Conventional IGCC processes employ low-temperature liquid scrubbers for H2S removal that need pre-cooling and consecutive reheating of the feedstocks that unavoidably reduce their thermal efficiency. For this reason, hot syngas treatments are needed. Among these, mid-temperature once are very promising due to the possibility to design suitable mesoporous solid sorbents stable for several desufidation cycles. Recently, efficient sorbents at mid temperature (300°C) based on zinc oxide or iron oxide dispersed into mesostructured SBA-15 have been proposed [2,3]. In particular, iron oxide composites showed both the best performance in terms of H2S removal and the lower regeneration temperature. In this context, the present contribution is focused on iron oxide-based sorbents dispersed into MCM-41 as alternative supports to SBA-15. The higher surface area, due to the smaller pore size and wall thickness than SBA-15, should in principle allow to improve the efficiency of the impregnation process of the active phase into the mesochannels, that as a consequence should leads to an enhanced removal performance. Moreover, the possibility to decrease the particle size of the MCM-41 from micro to nanometric dimension should permit a better accessibility of the active phase to the H2S. Furthermore, the low regeneration temperature found for mesostructured SBA15 based iron oxide sorbents (around 300°C) should assure the stability of the MCM-41 support during the repeated sulphidation and regeneration processes. To this aim, mesostructured micrometric (Fe_MCM41_M) and nanometric (Fe_MCM41_N) MCM-41 sorbents have been synthesized, tested and compared with two reference sorbents (Fe_SBA15 and commercial unsupported ZnO). Fe_MCM41_M shows the highest values of the sulphur retention capacity in all the sulphidation cycles, although its performance decreases at the second cycle. The nanometric Fe_MCM41_N sorbent shows a lower performance than micrometric one probably for the presence of disordered micropores at the surface of the nanoparticles which should inhibit the H2S access to the active phase. The low regeneration temperature in the 300-350 °C range, as well as the stability of the performances after the first sulphidation cycle, render these systems promising sorbents for efficient IGCC systems.


Noor Atiqa Binti Mat Saleh
Kumoh National Institute of Technology, South Korea
Title: Synthesis of Fe3O4 Coated Au Nanorod/Ag/SiO2 Core/Shell/Shell Structure and Its Anticancer Effect

Biography: Atiqa Saleh received her B.Sc degree in Applied Chemistry from University Technology of MARA (UiTM), Malaysia and currently a M.Sc degree student in Kumoh National Institute of Technology (KIT), Korea. Her research focus is on multifunctional nanoparticles in biomedical applications.

Abstract: Rapid evolution in nanoscience for cancer treatment shows great clinical potential for a wide range of tumors and development of multifunctional nanoparticles has recently emerged as an important issue for nanomedicine. Because multifunctional nanoparticles integrated with an imaging probes and therapeutic have potential in terms of developing theranostics, which could promise a new paradigm in the future personal care. Moreover, multifunctional nanoparticles help researchers to achieve synergetic effect of individual nanoparticles. Hence, our study addresses synthetic mechanism for iron oxide coated Au nanorod/silver/silica (IO-AuNR/Ag/SiO2) core/shell/shell structure. Hybridization of AuNR and Ag could allow us the synergistic effect of AuNR-based photothermal effect and cytotoxicity of Ag layer that could lead to make considerable advances in fighting against cancer. Moreover, the IO oxide as MRI T2 contrast agent allows us early diagnosis of cancer. During the polyol procedure for the IO coating on the AuNR/Ag/SiO2, we found decreasing size of AuNR/Ag due to dissolving of the AuNR and Ag layer with triethylene glycol. Therefore, longitudinal surface plasmon resonance (LSPR) absorption wavelength (LSPR = 730nm) of the bare AuNR was blue-shifted to visible wavelength (LSPR = 635nm) by dissolving the AuNR. Actually, near-infrared (NIR) light is well-known for providing a “therapeutic window” into biological tissue due to its much longer penetration depth than visible or infrared light. For that reason, the AuNR has drawn more attention for biomedical applications than other gold nanostructures. Therefore, we used the AuNR with the high aspect ratio (LSPR = 1,000nm) for the synthesis of the IO-AuNR/Ag/SiO2 with the LSPR mode of the NIR region. From in-vitro experiments, we found that the cancer-killing efficacy of the present IO-AuNR/Ag/SiO2 nanocomposites was significantly enhanced as compared to that of the bare AuNR. Moreover, the IO could make it possible to enable local heating via external magnetic field.


Aleksandra Poniatowska
Warsaw University of Technology, Poland
Title: Functional graphene oxide coatings on metallic surfaces

Biography: Aleksandra Poniatowska graduated Biotechnology in 2015 on Warsaw University of Technology, Faculty of Chemistry. Now she is PhD student in Biomedical Engineering Laboratory at Faculty of Process and Chemical Engineering. Currently she work on surface’s modification with graphene oxide and its synthesis methods

Abstract: In presented project we focus on synthesis of graphene oxide, its properties and obtaining coatings on metallic surfaces. Graphene oxide coatings can isolate the surface of the metal from direct contact with tissues and can improve characteristics of metal. Moreover the functionalization of graphene oxide by attachment of peptides or antibodies can lead to novel properties of the material such as prevention from blood clotting. In this study two different synthesis approaches: bottom-up and top-down have been investigated. The first one was modified Hummers method according to Marcano-Tour.1 In the second case graphene oxide was synthesized via pyrolysis of citric acid according to Dong research.2 In order to prepare GO coatings on stainless steel a electrophoretic deposition has been applied. We tested a various process conditions including the composition of the electrolyte solution, its pH, concentration of GO or current parameters. GO coatings on gold surfaces were obtained with the use of gold-sulphur bonds. For that purpose on the thoroughly cleaned surface of gold sputtered onto glass slide, or a gold SPR sensing chip, a self assembled monolayer (SAM) of compound containing thiol and amine groups ( such as cysteine or cystamine) has been created. Subsequently, a well known technique of amine coupling has been used for binding carboxyl groups in a two-step amine coupling process. The obtained graphene oxide was characterized by infrared spectroscopy, Raman spectroscopy, SEM and fluorescence measurements. Based on the results we can conclude, that the chosen synthesis methods are effective and the obtained product can be used to modify metal materials. The coatings of graphene oxide on gold or stainless steel surfaces were tested by using techniques such as infrared spectroscopy, SEM and contact angle measurements. FTIR spectra confirmed the presence of hydroxyl and carbohydrate moieties on surface of modified material. We also found the best conditions for coating process such as time or pH of solution. Presented methods for coating steel and gold surfaces are innovative, simple and can be used in large scale for coating different workpieces. There is thus a possibility to create a new biomaterial, which could find an application in medicine, however further investigation on biocompatibility is required.


Barbara Sipos
University of Szeged, Hungary
Title: Structural characterisation and tablettability of diclofenac sodium-titanate nanotube composites

Biography: Barbara Sipos is a Ph.D student at the Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, Hungary. She received her MSc degree in Pharmacy from the same university in 2014. Her main field of investigation is API-titanate nanotube composites. Her research interests include therapeutic application and manufacturing of nanotubes, nano-scaled drug delivery systems.

Abstract: Titanate nanotubes (TNT) are promising nanomaterials for various pharmaceutical applications [1-2]. Among other advantageous properties, TNTs are apt for being filled with active pharmaceutical ingredients (API) and thereby to be used as carrier materials [3]. The aim of the present work was to investigate the structural properties and tablettability of 1:1 ratio diclofenac sodium- hydrothermally synthesized TNT composites (DicTi) in order to reveal their potential role for pharmaceutical industry in the development of formulation and manufacturing of nanocrystalline APIs. For the better understanding of the effect of composite formation, a comparative study of diclofenac sodium and DicTi samples was accomplished. The structural properties of the composites were characterised by scanning electron microscopy, FT-IR, thermoanalytical methods and contact angle measurements. Based on the results, the incorporation of diclofenac sodium into TNTs was successful, the interactions stabilising the composites were identified as hydrogen bonds. The tablettability of the composites was estimated by determining their flowability (flow time, angle of repose, Hausner Ratio and Compressibility Index), compaction behaviour (compactibility and compressibility) by using Kawakita and Walker models, and post-compressional properties (apparent density, breaking strength and disintegration time). Measuements revealed that composite formation of diclofenac sodium resulted in better flowability and compaction behaviour, and also induced more ideal post-compressional properties over the pure API.


Michał Wojasiński
Warsaw University of Technology, Poland
Title: Hydroxyapatite nanoparticles properties in lecithin-based wet chemical precipitation

Biography: Michał Wojasiński received his MSc Eng. in chemical and process engineering from Warsaw University of Technology in 2011. Now he is a PhD student in Department of Biotechnology and Bioprocess Engineering (WUT) and a member of BioMedical Engineering Laboratory. His current research interests include nanofibers fabrication and hydroxyapatite nanoparticles formation. He is an author and co-author of 15 articles and conference papers.

Abstract: Growing interest in medical application of nanoparticles creates a demand for well-controlled, rapid and reliable large-scale production of such particles. One of the examples of nanoparticles important for medicine is hydroxyapatite (nHAp). Composed from mineral similar to bone component,nHApfinds application in the fields like implant production or coating, drug delivery systems, or dental products. Due to chemical composition and properties of nanomaterial, nHAp easily incorporates into bone or teeth tissue, or penetrates cellular wall to deliver active substances bonded to the particles. Increasing the biocompatibility of the particles, controlling the morphology of particles and designing large-scale process for particles production remains scientific challenge.We present research concerning wet chemical precipitation of hydroxyapatite nanoparticles in presence of bioactive molecule – lecithin (nHAp-PC). We investigated the influence of processing parameters like reaction temperature, pH and reactants dosing on particles sizes and morphology in order to define crucial parameters for scaling-up the process. We conducted precipitation process in batch reactor using 0.5M solution of Ca(NO3)2•4H2O and 0.3M solution of (NH4)2HPO4in ultra-pure water, with 3% w/w suspension of lecithin (soybean) used as surfactant for control of particles morphology and surface modification agent. Detailed description of precipitation process was presented elsewhere [1]. We changed processing parameters: 1) reaction temperature: room temperature, 40℃, 60℃, 80℃; 2) pH: 8, 9, 10; 3) reactants dosing: dropwise, all at once. We also performed reaction without lecithin as a control process. In order to assess the influence of those parameters on nanoparticles size, morphology, surface charge and chemistry we performed nanoparticle tracking analysis (NTA, NanoSight, Malvern), dynamic light scattering analysis (DLS, ZetaSizerNanoZS, Malvern), scanning electron microscopy (SEM, Zeiss Ultra Plus, Germany), zeta potential measurement (DLS, ZetaSizerNanoZS, Malvern) and Fourier transformed infrared spectroscopy (FTIR, Nicolet 6700, ThermoScientific, USA). Analysis of changes of resulting nHAp-PCproperties showed that regarding the reaction temperature and reactants dosing those properties do not change significantly. However, changing pH causes shift in morphology of particles from spherical for pH=8, trough rod-like shape for pH=9, to spherical again for pH=10.In conclusion, product of wet chemical precipitation process of nanoparticles of hydroxyapatite modified by addition of lecithin to the reaction system is influenced only by pH, among investigated processing parameters. This indicates that precipitation process could be scaled-up, but close attention should be put into control of pH.


Ilona Łojszczyk
Warsaw University of Technology, Poland
Title: Hemocompatibility of the polypropylene membranes surfaces

Biography: Ilona Lojszczyk graduated Biotechnology on Warsaw University of Technology the Faculty of Chemistry. She is doing her PhD student at the Warsaw University of Technology the Faculty of Chemical and Process Engineering. Her collaboration with the BioMedical Engineering Laboratory began in 2012 during the research, which was conducted as part of the master’s thesis. Her Project Manager of her research grant is on: "Study on hemocompatibility of modified polymer surfaces", which is financed by National Science Centre in Preludium Program.

Abstract: Polypropylene (PP) is commonly used as polymer dedicated to contact blood, including oxygenating membranes that are a significant part of the cardiopulmonary bypass used during surgical procedures [1]. It presents acceptable hemocompatibility, yet after a long time of constant contact with blood they induce unwanted phenomena that are dangerous for patients. The presence of that material in vivo results in blood proteins adsorption and platelets activation [1], macrophages activation [2] and chronic inflammatory [3]. In vitro studies revealed that PP induces inflammatory reaction after 3 days [2]. Thus, to ensure that polymer membranes and devices would be able to work safely for a longer time, a suitable modification is needed in order to improve their hemocompatibility, especially adsorption of blood proteins (e.g. fibrinogen) and platelets activation, which lead to inflammation blood clots forming [4]. In this work we had developed a procedure for the modification of polypropylene in order to introduce hydrogel coating based on the polyvinyl pyrrolidone (PVP) with the use of a two-step free radical reaction, ethylene glycol dimethacrylate (EGDMA) as a crosslinking agent and cumene hydroperoxide (CHP), which is a source of radicals. The hydrogel polymer coating provides enhancement of its hemocompatible and biocompatible properties in a sustainable manner and requires intervention only on the material surface without changing the mechanical properties of polypropylene. Modified materials were checked for cytotoxicity in contact with the mouse fibroblast – L929. Amount of fibrinogen absorbed on the surface were determined by the ELISA assay. The samples were characterized by SEM (Scanning Electron Microscope).


Aleksandra Kuźmińska
Warsaw University of Technology, Poland
Title: Polyurethane modification using acrylic acid

Biography: Aleksandra Kuzminska is a PhD student at the Warsaw University of Technology, Faculty of Chemical and Process Engineering. She received her M.Sc. degrees in Biotechnology from the same university in 2015. Her research interests include surface modification, blood–material interactions, surface endothelialization and tissue engineered vascular grafts.

Abstract: Nowadays, there is great interest in creation of highly biocompatible and hemocompatible biomaterials. It is essential especially for blood contacting materials. The main goal is to obtain material that will not cause a negative response from the organism and will reduce the risk of blood clots [1]. To achieve desired biomaterials properties various physical/chemical modification methods are applied. One of the most widely used polymers for the production of cardiovascular implant are polyurethanes [2]. However, through contact with blood, number of unfavorable phenomena occurs, such as water absorption, platelet adhesion [3]. The aim of this work was to modify the polyurethane surface with acrylic acid by Ce(IV)-initiated graft polymerization and immobilize short peptide sequence REDV. Modification According to the literature REDV peptide sequence promotes endothelial cell adhesion [4], thus the peptide coating are designed to improve material hemocompatibility and biocompatibility. Acrylic acid modification effectiveness was analyzed by wettability and colorimetric examinations. Wettability analysis together with calculation of surface density of carboxyl groups allowed to confirm the presence of acrylic acid on the polyurethane surface. The presence of the peptide has been confirmed by BCA assay. Material biocompatibility was investigated by examining the material interaction with endothelial cells. Analysis of blood – material interaction has been investigated in order to determine if the materials are not thrombogenic. The fibrinogen adsorption to the materials surface and platelet adhesion has been examined.


TINGTING yin
Nanyang Technological University, Singapore
Title: The state of hydrogen-bonding in lead bromide perovskites in low temperature phases

Biography: Tingting YIN Ph. D. E-mail:YINT0006@e.ntu.edu.sg Research: Photoluminescence and Raman Studies on Plasmonic Nanostructures and Perovskites Educational Background: 2013~ PhD student in Nanyang Technology University 2013 B.S. Physical Science, Jilin University of China

Abstract: The structural stability of the organometal halide perovskites (CH3NH3PbX3, where X = Br, I, Cl) is highly correlated with the rotation of the methylammounium (MA) cations and the tilting of the PbX6octahedra, leading to a series of structural phase transitions upon cooling. However, one critical question remains to be addressed: how does hydrogen-bonding evolve during the phase changes? In this study, a microscopic picture of the hydrogen-bonding dynamics between H atoms of methylammonium (MA) cation and the halide ions is developed by combining ab initio calculations with temperature-dependent Raman scattering and powder diffraction (XRD) measurements collected from monocrystal and polycrystalline MAPbBr3 perovskites. The Raman and XRD results reveal a cubic-to-tetragonal phase transition at 230 K and a tetragonal-to-orthorhombic phase transition at 140 K. While H bonds exist between the ammonium (NH3+) group and Br ions (HN ••• Br) in all three phases, similar bonds between the methyl (CH3) group and Br ions (HC ••• Br) are only formed in the orthorhombic phase. Hence, both ends of the organic MA molecule are locked in this orthorhombic phase, where the C-N bonds and HN ••• Br bonds lengthen and weaken, resulting in a red shift for the CH3 and MA Raman modes and a blue shift for NH3+ Raman modes. The ab initio calculations confirm that the hydrogen-bonding state of the CH3 and NH3+ groups is distinct and varies in different phases. Taken together, these results demonstrate that the strength and angle of the hydrogen-bonding drive the evolution of temperature-dependent MA cation dynamics inside the inorganic cage. This comprehensive understanding of the hydrogen-bonding interactions makes possible the tuned phase transition and the optimized photovoltaic properties in hybrid perovskites.


Asaf Farhi
Tel Aviv University, Israel
Title: General electromagnetic eigenstates in a two-constituent composite medium and the electric field of external current sources

Biography: AsafFarhi is a PhD student under the supervision of Prof. D. J. Bergman in the Physics department at Tel Aviv University. Asaf did his undergraduate degree in Electrical Engineering at the Technion. He did the M.Sc in Physics at Weizmann Institute of Science, working on free energies of RNAs and on a method to calculate free energies. Then he worked on methods to calculate free energies of molecular processes in molecular simulations. In his PhD he has been working with Prof. Bergman oneigenfunction expansion of the electric field of a localized source in a gradually more general setup of a slab in medium.

Abstract: A Veselago lens can focus at a point the radiation [1] and amplify the evanescent waves, resulting in enhanced resolution [2]. In our previous works we analyzed such a setup with a localized source in the quasistatic regime and using the full Maxwell equations whenμ=1 everywhere in the system [3-5]. Here we introduce a formalism to calculate the electric field of external current sources in a two-constituent composite medium where both ϵ and μof the inclusion and the medium can take any value. We first calculate the eigenstates of anϵ_1,μ_1 slab in an ϵ_2,μ_2 medium. We then use these eigenstates to expand the electric field of an oscillating point electric dipole. We show that the electric field of the high-k evanescent modes is enhanced for the TM modes when ϵ_1=-ϵ_2 and for the TE modes when μ_1=-μ_2. The formalism is applicable to other inclusion types such as a sphere and a long cylinder and treats current sources in a simple manner. We also show that the eigenstates when μ=1 everywhere in the system correspond to 3D phased arrays. This has potential to enable the generation of vector spherical harmonic waves which can be highly localized.


Dalel ASKRI
Univ. Grenoble Alpes, France
Title: Study of the Toxic effects induced by Iron Oxide Nanoparticles on SH-SY5Y neuroblastoma cell line

Biography: My name is DalelAskri and I was born in Tabarka, Tunisia on 1989. I received my Bachelor Degree (Medical Biology) from the University of Tunis El Manar, Tunisia. Then, I moved to Europe and I received my Master degree (Biohealth Computing Erasmus Mundus European Master) from the University of Joseph Fourier, France and the University of Barcelona, Spain.Afterwards, I returned to Tunisia, where I started my PhD thesis in a cotutelle between the University of Carthage (Tunisia) and the University of Grenoble Alpes (France). I am interested on the applications of nanotechnologies on Biomedicine and their risks.

Abstract: Iron Oxide Nanoparticles (IONPs) are widely used in many fields especially in Biomedicine. Due to their unique properties, they are used as theranostic agents for cancer, and also as MRI contrast agents [1]. So, the safety of these NPs should be studied to well understand their mode of action, to optimize their benefits and to minimize their risks [2]. Our study was designed to investigate IONPs effects on viability of neuroblastoma cell line SH-SY5Y. Three fractions of IONPs were characterized by XRD, TEM and DLS before using them to treat cells at increasing concentrations. Morphological cell changes were evaluated using inverted microscope and cell viability was assessed by MTT. Cell viability was expressed as percentage of live cells / total cells. The cristallite sizes of IONPS 14, 22 and 30 nm were determined according to the highest peak observed in XRD after three agitation times 15 min, 24 and 48 h respectively. Moreover, the results showed that there is no other elemental impurities present in IONPs. After DLS measurments, we found that IONPs had different sizes from their powder size and more interesting according to the type of the solution and the degree of its complexity. After 24h treatment, cells exhibited morphological changes i.e decrease in cell proliferation, cells are less flat, loose of the neuronal aspect and detachment from the wells comparing to the control. This result was size and concentration dependent as well as the results from the MTT test. Moreover, the IONPs with the highest size were found to be the most toxic for the cells by decreasing of viability more than 50% at 100 and 200 µg/mL. Our work evidences the toxic effects of IONPs on neuroblastoma cells which could be promising for their use to treat this kind of cancer. Further studies should be conducted to better understand these findings and particularly the cellular and molecular mechanisms.


Żaneta Górecka
Warsaw University of Technology, Poland
Title: Multifunctional polyurethanes/chitosan composites for biomedical applications

Biography: Żaneta Górecka, M.Sc. Eng. Is an PhD Student in Biomaterials field at Warsaw University of Technology, POLAND. Her Education during 2015 from WUT – Faculty of Materials Science and Engineering, Master of Science in Engineering and her specialization in Biomaterials during 2013 at WUT – Faculty of Mechatronics, Engineer in Biomedical Engineering field. Her Scientific interest are biodegradable polymers, medical imaging and contrast materials, tissue engineering, shape memory polymers

Abstract: The field of biomaterials has developed side by side with novel strategies in surgery allowing for creation and expansion of more effective and less invasive treatment options. Biodegradable, biocompatible shape-memory polymers are promising multifunctional materials able to fulfill these requirements. The goal of this study is to develop thermally activated shape memory polyurethane/chitosan composites that are able to recover from a secondary shape induced by mechanical deformation to a primary equilibrium shape when they are heated to melting temperature Tm of crystalline region. The relationship between crystalline structure, thermomechanical properties and composition of the polymer networks was evaluated. A series of chitosan/polyurethanes were synthesized from branched PCL/PLGA-polyols, aliphatic diisocyanate as a coupling agent and chitosan. Polymer morphology was characterized by wide-angle X-ray scattering (WAXS), differential scanning calorimetry (DSC). DSC results revealed that transition temperature can be effectively adjusted to the range of 32-44 °C by changing molecular weight and branching degree of polyols, fulfilling the essential requirements of medical implantations. The temporary shape of the scaffolds was programmed by tensil thermomechanical test using dynamic mechanical analyser (DMA) and ability of the samples to recover of permanent shape was analysed in air and in water. Quantitative assessment of the shape memory performance through tension-controlled shape memory test verified that polymers after 50% deformation exhibited a 90% -100 % shape-fixing ratio and 85-95% of shape recovery ratio. Biological assay results revealed that chitosn/polyurethane materials were biocompatible by promoting MG-63 cell line proliferation, and enhanced alkaline phosphatase expression


Shu Min Tan
Nanyang Technological University, Singapore
Title: Electrochemical synthesis of high performance tungsten sulfide for hydrogen evolution reaction

Biography: Shu Min Tan obtained her B.Sc. (Hons) in Chemistry and Biological Chemistry from Nanyang Technological University, Singapore, in 2013. Currently, she is pursuing her Ph.D. under Prof. Martin Pumera, with her research interest centered on electrochemical investigations of layered nanomaterials for energy-related applications. She has established an electrodeposition strategy for transition metal chalcogenides fabrication with hopes of developing electrodeposition as the mainstream fabrication method of layered nanomaterials. Fundamental studies on the electrochemical properties of these nanomaterials elucidate their electrocatalytic performances. This, in turn, allows the development of highly active electrocatalysts for applications such as hydrogen evolution and oxygen reduction reactions.

Abstract: Transition metal dichalcogenides have been widely studied as potential alternatives to the archetypal Pt catalyst for hydrogen evolution reaction (HER). However, typical fabrication methods make use of environmentally damaging chemicals and require synthesis conditions with high energy consumptions. Herein, electrochemical synthesis is demonstrated to be a viable ecofriendly method for fabrication of layered materials that can substitute conventional techniques. In this fundamental study, the fabrication of a WS2/WS3 material (WS3-x) using cyclic voltammetry (CV) was presented. Via comprehensive analysis of the deposition voltammograms with differing CV settings, and characterisation of the deposited materials with X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) coupled to energy-dispersive X-ray spectroscopy (EDS), a binary mechanism which includes the WS3 deposition followed by partial reduction to WS2 was suggested. Compared to non-electrodeposited WSx materials, WS3-x exhibited slow heterogeneous electron transfer toward surface-sensitive redox probes due to its primarily basal plane. On the other hand, the WS3-x material displayed outstanding catalytic performance towards HER, with the lowest Tafel slope of 43.7 mV dec–1 achieved to date; this was credited to varying metal-chalcogen binding energies within WS3-x. Fundamental comprehension of the electrosynthesis process is vital for development of ecofriendly synthesis of highly HER-active electrocatalysts for sustainable energy generation. Though the process may be different for different types of nanomaterials, this study can be exploited for its analyses from which the results were obtained, to allow the development of electrochemical synthesis as the chief synthesis approach for HER electrocatalyst.


Volkan ALTUNAL
Cukurova University, TURKEY
Title: A Comparison Study of Beryllium Oxide (BeO) Synthesized Using Different Methods: Their Structural Characterization and Dosimetric Properties

Biography: Volkan ALTUNAL was born in 1990, in Adana, Turkey. He completed primary, secondary and high school education in Adana. He graduated from Cukurova University with a Bachelor’s degree in Physics, in 2013. He received the MSc degree in Physics from Cukurova University, Adana, in 2016. He started his PhD studies in the same department at Cukurova University. He has been studying on synthesis and characterization of metal oxides, and investigation of the achieved work for radiation dosimetry applications using thermoluminescence (TL) and optically stimulated luminescence (OSL) techniques.

Abstract: In recent years, particular attention has been paid to the effect of the nanostructure, e.g. particle size, on structural/electronic properties and how these alter other industrial-related properties. In this study, we have analyzed how nano-particulated beryllium oxides were synthesized, their most significant structural and luminescence properties. BeO nanophosphors were synthesized using Sol-gel, Polyacrylamide-gel and Co-Precipitation methods. BeO pellets were prepared using the nano-powders synthesized using those methods and after cold press they were sintered. Structural analysis of BeO ceramic pellets were performed and compared with each other using X-ray Diffractometer (XRD) and Scanning Electron Microscopy (SEM) methods. Dosimetric characteristics of BeO ceramic pellets were studied using Optically Stimulated Luminescence (OSL) technique. The bright OSL signals were managed after the beta irradiation of the pellets in accordance with the literature. Reusability and the beta dose response properties of the BeO pellets were investigated in detail. On the other hand, some luminescent results were compared with that of the commercially available BeO chips (Thermalox995). It can be concluded from the experimental results that Sol-gel might be the preferable method for synthesis of BeO nanophosphors. BeO pellets produced by this method give hope for radiation dosimetry applications.


Marco Sanna Angotzi
Università di Cagliari, Italy
Title: Design and characterization of bimagnetic spinel ferrite core-shell nanoparticles

Biography: Marco Sanna Angotzi graduated in Chemical Science in 2015 at the University of Cagliari with highest mark presenting the thesis “Synthesis and characterization of spinel ferrite nanocrystals with core-shell architecture”, developed at the Charles University of Prague under the supervision of Prof. Daniel Niznansky. From October 2015, he is a PhD student in Chemical Sciences and Technologies working on the design of hetero-architectures based on spinel ferrite nanoparticles, under the supervision of Prof. Anna Musinu and Prof. Carla Cannas. In 2016 he served an internship on “Chemical mapping at atomic level” at Brookhaven National Laboratory, New York, under the supervision of Prof. Huolin Xin.

Abstract: In recent years, there has been increasing interest towards the synthesis of exchange coupled bi-magnetic hard/soft and soft/hard core/shell nanoparticles, thanks to their various applications, e.g. magnetic fluid hyperthermia (MFH).[1], [2] Among the proposed materials, spinel ferrite (MIIFe2O4, MII= Fe, Co, Mn, etc.) is the most interesting, due to the possibility of finely tuning the magnetic behaviour depending on the type of the divalent ion, leading to hard or soft isostructural phases. Therefore, the main advantage of their use is the possibility of the epitaxial growth of the shell around the pre-exiting core, trough the so-called seed-mediated growth method. Generally, this method is conducted by means of surfactant-assisted high temperature thermal decomposition of organometallic precursors, [2]–[4] which allows a good control of the shell growth and high crystallinity. Nevertheless, because of the high amount of toxic organic solvents, this method cannot be considered environmental friendly. Consequently, alternative methods that preserve the advantages of the thermal decomposition but use lower temperature and low-boiling solvents are currently being investigated. In this work, a low-cost seed-mediated growth strategy in solvothermal conditions was used to synthesize core-shell nanoparticles made of hard (CoFe2O4) and soft ferrite spinel phases (Fe3O4, γ-Fe2O3, MnFe2O4). The nanoparticles show a spinel structure (XRD), spherical shape, low dispersity (TEM and HRTEM) and are capped by a monolayer of oleate molecules (TGA and FTIR). The chemical mapping at atomic level by the combined use of STEM-EDX and STEM-EELS techniques confirmed the formation of a core-shell structure revealing the effectiveness of the adopted synthesis method for the synthesis of these systems and providing details on the hard/soft interfaces. The core-shell samples have been also studied together with a suitable physical mixture of the two counterparts by 57Fe Mössbauer spectroscopy giving interesting information about the magnetic coupling of the two phases. MHF measurements highlight that the core-shell ferrimagnetic – ferrimagnetic architectures are promising systems showing increased heat release with respect with the corresponding cores.


L. Filali
University of Oran1 Ahmed Ben Bella, Algeria
Title: Effect of hydrogenation of amorphous silicon surfaces on protein adsorption

Biography: My name is Larbi Filali, I was born in Algeria. I started my PhD thesis at the Laboratory of Thin Films and Materials for Electronics, department of physics, University of Oran1, Algeria, in 2012. My research interests on the Adsorption of macromolecules by the free surface of hydrogenated microcrystalline silicon.

Abstract: We studied in this work, the adsorption of proteins on thin layers of amorphous silicon, depending on the surface conditions. We have a set of samples of sputtered silicon thin films, with different hydrogen concentration at the surface. Infrared spectroscopic analysis with the ATR method, ellipsometry and scanning electron microscopy revealed that the adsorption on the surfaces is enhanced on samples with highest hydrogen surface concentration. This result leads to the conclusion that the adsorption is caused by hydrogen bonds at the film / protein interface, which seems to be the dominant effect compared to surface roughness and wettability, which were found to decrease as hydrogen surface concentration increases.


Y. Brahmi
University of Oran1 Ahmed Ben Bella, Algeria
Title: Post-deposition Hydrogen treatment effect on surface roughness and hydrophobicity of amorphous silicon films

Biography: My name is Yamina Brahmi, i was born in Algeria. I started my PhD thesis at the Laboratory of Thin Films and Materials for Electronics, department of physics, University of Oran1, Algeria, in 2012. My research interests on the optoelectronics properties of the interfaces liquids/ amorphous silicon.

Abstract: Amorphous silicon films were deposited by radiofrequency (rf) magnetron sputtering. Then, the films were treated by pure hydrogen gas at different pressures (1, 2 and 3 Pa) for 20 min, to investigate its effect on surface hydrophobicity (or un-wettability) and roughness. Fourier transform infrared-attenuated total reflection (FTIR-ATR) spectroscopy was used to evaluate presence of Si-H bonds at the surface. Results obtained by the atomic force microscopy (AFM) showed a sharp decrease (the non-treated film had a root mean square value of 10.94 nm, which then dropped significantly to 6.69 nm for the 3 Pa hydrogenated film) in surface roughness as a result of hydrogenation. Optical transmission results revealed that optical properties were not affected. Contact angle measurements showed an enhanced hydrophobicity by 15 degrees for the 1 Pa hydrogenated film, and then it decreased for the 2 Pa and 3 Pa hydrogenated films. This result indicates that the decrease in roughness compromised the hydrophobization process.


Yun-Chung Chou
National Chung Cheng University, Taiwan
Title: A novel specific size range purification of MoS2nano-particle

Biography: Yun-Chung Choureceived the M.S. degree in electrical engineering from National United University in 2015. Now, he is a B.S. student in the Graduate Institute of Opto-Mechatronics of National Chung Cheng University. His current research interests include optics, fundamentals and application of anodic aluminum oxide, and solid state lighting.

Abstract: MoS2 is a two-dimensional material which have potential in optoelectronic fields. Some researchers find out the layers of MoS2 and photoluminece intensity are inversely correlated. When the MoS2 is a bulk material, its bandgap is approximate 1.2 eV(indirect bandgap),but asnano-particles the bandgap will increase to approximate 1.9 eV(direct bandgap). To be able to utilize the MoS2nano-structure in other applications, now the size control of this material is the challenge. In order to solve the problem about wide variation of MoS2 sizes, we further develop a methodto utilize the film with regular arranged micro-level and nano-level pore. Under the technique of embossing, the three layer sandwich structure based on the holder will be formed(the middle of the sandwich is a layer of film with nano-level pore). MoS2 powders are added into insoluble solutions and then pour into the filter system for size purification. Finally we can obtain regular and uniform nano-particles of MoS2 with specific size.


Hyun Kim and Bee Lyong Yang
Kumoh National Institute of Technology, South Korea
Title: Lifetime of Photo-induced Charge Carriers in PEC Electrode Systems for Solar Hydrogen Evolution

Biography:

Abstract: Photo-electrochemical redox reactions on interface between heterogeneous photo-catalysts acting like semiconductors and active redox species of electrolytes can be utilized to split water into hydrogen and oxygen or to decompose organic contaminants. Hydrogen energy system has been significantly considered as an alternative clean energy source instead of fossil fuel based energy systems because of CO2 gas generation during combustion of fossil fuel to produce energy. CO2 gas can cause severe environmental crisis by melting numerous glacier. Thus, hydrogen energy system as CO2 gas free clean energy system has become ultimate alternative. Conventional hydrogen generation methods are steam reforming with metal catalysts (Ni, Cu, Fe etc) and electrolysis of water. However, hydrogen generation processes from reforming produce CO2 gas. Also CO2 gas is produced by electrical power generation for the electrolysis. Resulting of these problems has led that new generation method using solar energy for hydrogen. Photo-catalytic water splitting for hydrogen generation technique has been much attracted from early 1970 by Honda-Fujishima to until now [1]. For this technique photo-catalyst used should have a narrow band gap for absorption of ultraviolet/visible/infrared region and long term photo-electrochemical stability to be an efficient system. But, the most important step of photo-catalytic hydrogen generation is a charge transfer to interface where reactive chemical species are. In other words, the photo-catalytic hydrogen generation is highly limited by charge recombination at crystal defects and back-reactions of intermediate species [2]. We have discussed how to prevent charge recombination in this study. To enhance charge recombination rates of nano-structured photo-catalyst electrodes, p-n junction and perovskite structure which have an electrical internal field have been applied to drift photo-generated charge carriers toward interfaces where photo-catalytic reaction occurs. We have not only modified dimensions of nanostructures related to width of electrical internal field region but also adding chemical elements into photo-catalysts to control width of electrical internal field. Furthermore, the solar hydrogen generation test will carry out using gas chromatography and its results will be comparatively discussed.


F.Zeudmi Sahraoui
University of Oran1 Ahmed Ben Bella, Algeria
Title: Structural studies of the hydrogenated silicon thin film deposited by RF magnetron sputtering

Biography: My name is Fouzia ZEUDMI SAHRAOUI, i was born in Algeria. I started my phD thesis at the Laboratory of Thin Films and Materials for Electronics, departement of physics, Oran1 University, Algeria, in 2012. My research interests on the deposition and characterization of nanostructured films based on Silicon for the sollar cells application.

Abstract: Hydrogenated nanocrystalline silicon films have become the subject of great attention due to their remarkable properties for microelectronics and solar cells technology. The structural changes in intrinsic silicon thin films deposited by radiofrequency (rf) magnetron sputtering at room temperature (Ts = 35°C) are investigated as a function of the rf-power. The aim of this work is to get more insight into the effect of the rf-power. By varying the rf-power from 200 W to 500 W, and keeping all other parameters of the plasma constant (the total pressure is fixed at 6 Pa, the plasma gas mixture of 30% Argon and 70% H2 and the target-sample holder distance of 50 mm). The composition and the microstructure of the films were analysed by FTIR, atomic force microscopy (AFM), optical transmission measurements (OT) and Raman analysis. The results indicate that the film deposited at RF_power equal to 200w has amorphous structure.The films deposited at RF_power above the 200w have nanocrystalline structures.The grain size, the volume fraction and thickness increase with increasing rf-power.


Zofia Kula
Lodz University of Technology, Poland
Title: The impact of natural dyes on dental composite materials modified by means of hydroxyapatite

Biography: Zofia Kula, a PhD student at the Technical University of Lodz in Poland. Doctoral thesis realized in the engineering coatings and non-metallic materials department. Dealing with dental materials mainly polymers based on polimetacrylan methyl, ceramics and hydroxyapatite. She is also a graduate of the Medical University, where she studied dental techniques obtaining the Bachelors Degree in Dental Techniques. She continued studying at the Technical University of Lodz in the department of Mechanical Engineering, direction: Engineering Materials where she obtained the Masters Degree.

Abstract: Composite materials based on resins, polymerized with UV light have become widely used by dentists to perform medical treatments and surgeries in the field of dentistry. Their satisfactory aesthetics, ease of use, the ability to use them both in direct and indirect techniques, as well as rapid treatment effect, results in the fact that there does not exist any alternative group of dental materials that could be used to reconstruct your lost tooth tissue. Hydroxyapatite (HAp) is an inorganic compound included in the bones and teeth. Due to its high biocompatibility with human hard tissues, hydroxyapatite has been widely used in medicine and dentistry. The content of hydroxyapatite in the dental filling is to reduce the sensitivity of the tooth after endodontic treatment, prevent caries and improve the aesthetics of the existing fillings. In this paper the light cured composite materials containing HAp have been used . The colour stability test has been performed on the above composite materials. The test has been performed with the use of coffee containing tannins and red wine containing anthocyanins. The research has demonstrated varying levels of susceptibility of composite materials with hydroxyapatite to the impact of external factors causing colour changes.


Wei-Cheng Lo
National Chung Cheng University, Taiwan
Title: Optical properties of few-layer MoS2 film using hyper spectral imaging

Biography: Wei-Cheng Lo received the M.S. degree in electrical engineering from National Tainan University in 2015. Now, he is a B.S. student in the Graduate Institute of Opto-Mechatronics of National Chung Cheng University. His current research interests two dimensioal materials, fundamentals and application of molybdenum disulfide

Abstract: As the development of semiconductor industry, researcher have gradually focused on two dimensional materials such as MoS2 and WSe2. Among them, the characteristic of MoS2 have gain the most attention. Utilizing its two dimensional characteristic, band gap structure, valley Hall effect, nonlinear optic characteristics, and faster carrier speed. MoS2 can be applied as optical detectors. However, there is rarely study related to its physical properties such as refractive index and extinction coefficient due to the difficulty in optical measurement. Here we use CVD to grow few-layer of MoS2 film, utilize hyper spectral imaging technology to find out the optical properties of MoS2. Such results can be supported more material information’s of few-layer of MoS2 film for other study group in the future.


Yu-Hsin Weng
National Chung Cheng University , Taiwan
Title: Photoelectrochemical characteristic effects of Monolayer n-type MoS2 grown on p-type Cu2O

Biography: Yu-Hsin Weng received the M.S. degree in department of electronic engineering from National I-Shou University in 2015. Now, she is a B.S. student in the Graduate Institute of Opto-Mechatronics of National Chung Cheng University. Her current research interests include hydrothermal method, photoelectrochemical, chemical vapor deposition, optics and solid state lighting.

Abstract: In the work, the n-type MoS2 monolayer flakes were grown using chemical vapor deposition (CVD), and the p-type Cu2O thin film were grown using Electrochemical deposition method. Raman spectroscopy and Photoluminescence (PL) measurements were further implemented to confirm the number of layer. In addition, Transmission electron microscopy (TEM) was used to analyze crystal structure of MoS2 flakes, Selected area diffraction pattern (SAD) indicating that MoS2 flakes were single crystalline. After MoS2 grown on 300 nm SiO2/Si substrate by CVD process, the MoS2 flakes were transferred to Cu2O thin film to finish the p-n heterogeneous structure. The p-n heterogeneous structure was prone to photoelectrochemical reactions and self-powered. We researched electrical properties variety and characteristic of photovoltaic without requiring an extra bias voltage. We hope the different biosensor of cancer level cells can be applied in the future.


S. Benkara
Larbi Ben M’hidi University, Algeria
Title: Study of structural, morphological and optical, properties of Fe doped SnO2 semiconductor thin films prepared by sol-gel technique

Biography: Benkara Salima was born in Constantine, Algeria on 1972. She received the graduate electronic engineering in communication option and graduation Magister in electronics components from the institute of electronics at Constantine University, Algeria, in 1997 and 2000 respectively. She received her Doctorate on Science in electronics components from a department of electrical engineering of Skikda University, Algeria; in 2014. She is presently a teacher in the department of electrical engineering, Oum el Bouaghi University, Algeria. Her research interests focus on the synthesis and characterization of nanostructured films based on oxides like: SnO2, ZnO, TiO2... and investigation of their properties.

Abstract: The undoped and iron doped tin oxide thin films were deposited on glass substrates by sol-gel dip coating technique, using tin chloride and iron III chloride as the starting materials. The effect of method conditions and Fe doping on the structural, morphological and optical properties of applied thin films have been studied by X-ray diffraction (XRD), and UV–vis spectroscopy. Surface topography of thin films was examined by atomic force microscopy (AFM). XRD patterns showed an increase in peak intensities of the rutile and cubic crystalline phases of SnO2 by increasing the Fe content (figure 1). SnO2 nanoparticles in the range of 9 –20 nm size were obtained by the Scherrer equation using FWHM (Full Width at Half Maximum) values of the main peaks in the XRD diffraction pattern when calcined at 500 °C. The UV–Vis–spectroscopy analyses have shown that all the thin films were transparent in the visible region with an average transmittance ranging from 70% to 88%. And showed a direct band gap reducing with increase in Fe3+ doping from 3.82 to3.72 eV. AFM images as shown in figure 2 have revealed that surface roughness is affected strongly by deposition conditions and dopant concentration. Keywords: Thin films, Tin oxide; Sol–gel growth, UV–visible spectroscopy, Dip-coating.


Keita Kontani
Meiji University, Japan
Title: Synthesis of rare earth hybrid nanoparticles in the apoferritin cavity

Biography: 2012-2016 Meiji University, Department of Physics, B.Sc. 2016- Meiji University, Graduate School of Science and Technology

Abstract: Gd and Eu nanoparticles (NPs) are synthesized in a protein (apoferritin) cavity. Apoferritin is an iron storage protein which exists in animals, plants and bacteria. Apoferritin is consisted by 24 subunits which form spherical shell of 13 nm with cavity of 7 nm. Protein shells served as a template to restrain particle growth and as a coating to prevent coagulation between NPs. Apoferritin is known to mineralize several metal ions in the cavity [1]. Here we report synthesis of hybrid rare earth NPs, Gd and Eu, in the apoferritin cavity. Using this hybrid NPs, Gd is expected to work as a contrast agent for MRI and Eu is expected to work as a photoluminescent marker. 30 µl of each Gd(NO3)36H2O and Eu(NO3)36H2O (0.5mM) solution was added to the 2.7 ml of apoferritin (0.1mg/ml) solution in 100mM MOPS buffer (pH 7.0) five times per hour. It was left standing for 20 hours at 50 ºC. The resultant solution was centrifuged at 9,500g 3min to remove precipitant and examined by transmission electron microscope, fluorescent spectrometer, and nuclear magnetic resonance spectrometer. Gd/Eu nanoparticles exhibit red photoluminescence (emission peak at 614 nm) and the longitudinal relaxation time of 1H at room for 10 MHz is 2.1 s which is shorter than pure H2O solution of 3.1 s. It's relaxivity (R1) is 25.3 mM-1・s-1 which is 6 times larger than conventional contrast agent Gd-DOTA (R1=4.1 mM-1・s-1) [2].


M. T. Tsai
National Sun Yat-Sen University, Taiwan
Title: Effects of ultrasonic surface mechanical attrition treatment on microstructures and mechanical propertiesof highentropy alloys

Biography: M. T. Tsai is a PhCstudent of National Sun Yat-Sen University.His research fields includenano/micro scaledmechanical behavior.

Abstract: Most high entropy alloys (HEAs) are cast for form single phase solid solution. The grain size and hardness/strength at room temperature (RT) under the as cast condition is typically large and low, respectively, though their high temperature (HT) properties might be more promising. In the research, we try to use the ultrasonic surface mechanical attrition treatment (SMAT) on the surface of the highentropy alloys to upgrade its RT surface characteristics, such as much finer grain structures and much higher hardness/strengths. The SMAT processing parameters will be tried within the ranges of 7-9 m/s for the ball speed, 4x102 s-1 for the strain rate, and 44-52 mJ for the input energy.The mechanical properties and microstructures after the processing, such as sample hardness, experienced depth, and grain size, etc., will be systematically examined and rationalized. In addition to the RT properties, the HT performance will also be studied by using focus ion beam (FIB) to machine micropillars from each phase to extract the individual HT strength and creep behavior.


Hafize Çakmak
Middle East Technical University, Turkey
Title: Synthesis and production of bulk amorphous steel from cast iron scrap

Biography: My name is Hafize ÇAKMAK and I was born in Momtchilgrad, Bulgaria, in 1991. I received the BSc. degree in Metallurgical and Material Engineering from Middle East Technical University, Turkey, in 2015, and I started my Master’s Degree studies in again Middle East Technical University. My current research interests include Bulk metallic glasses, amorphous steel, crystallization kinetics, glass forming ability, magnetocaloric effect, metallic glass coating. Moreover, I am a member of Welding Technology and Non-Destructive Testing Research /Application Center which is located in Middle East Technical University, Ankara.

Abstract: Bulk amorphous steels (BAS’s) are one of the promising advanced materials with superior mechanical and physical properties compared with their crystalline counterparts. These unique properties make BAS’s potential candidates for various engineering applications. As part of an investigation into bulk amorphous alloys, studies have been made to develop relatively more conventional, simple and widely used manufacturing method for the production of bulk amorphous steel from cast iron scrap. The BAS’s were synthesized by alloying cast iron scraps (3.5-4.5%C) with potential candidate alloying elements derived from our theoretical predictions in order to enhance the glass forming ability of Fe-based metallic glasses, by arc melting under controlled atmosphere. The thickness of the samples having an almost completely amorphous microstructure has reached >3 mm for alloys having relatively high glass forming ability. The phase transformation behavior from a liquid to an amorphous and amorphous to a nanocrystalline states upon various cooling/casting conditions respectively were investigated. The characteristic DSC pattern of melting involving a sequence of invariant reactions with a high magnitude of reaction enthalpies ratio appear to be essential parameters for high bulk glass forming ability.


Chiu-Jung Lai
National Chung Cheng University, Taiwan
Title: Detection of Periodontal Disease by Hyperspectral Imaging

Biography: Chiu-Jung Laireceived the M.S. degree in photonics engineering from Yuan Ze University in 2015. Now, he is a B.S. student in the Graduate Institute of Opto-Mechatronics of National Chung Cheng University. Her current research interests include optics and simulation.

Abstract: Periodontal disease is one of the common diseases, and often occurs in the middle-aged population. More than 90% people have gingivitis or periodontitis, and rely on doctor subjective diagnosis. As the initial periodontal disease will not be obvious signs, it is easy to miss the best time to treatment. We developed the hyperspectral imaging technology, and combined with the RX algorithm and CADCM image processing technology. This technique can correctly and quickly detect different stages of periodontal disease. The image resolution andprocessing time of this study is about 246 μm2/pixel and 30 minutes.


Chung-Hao Chang
National Chung Cheng University, Taiwan
Title: Optical calculation of ultrashort pulsed Bessel beam

Biography: Chung-Hao Changreceived the M.S. degree in Physics from Fu Jen Catholic University in 2015. Now, he is a B.S. student in the Graduate Institute of Opto-Mechatronics of National Chung Cheng University. His current research interests optical system design, Laser diode, optics and solid state lighting.

Abstract: In the last decade, Bessel beams have been used for a variety of applications in nonlinear optics as well as microscopes because of the almost no diffraction properties of Bessel beams. Direct laser writing with ultrafast lasers has become a practical technique for producing photonic components such as waveguides. These components have been fabricated using Gaussian beams focused by lenses. Fundamental Bessel beams have transverse field amplitude whose distribution is defined by a zero-order Bessel function. The pattern is characterized by a sharp center spot of several microns in size. In our research, the ray tracing method was used to investigate the generation of Bessel beams in a triplet lens. The optical design has the advantages of simple structure, high conversion efficiency and large optical damage threshold. Itcan be applied to the processing of femtosecond laser in the future.


ZIYAMUKHAMEDOVA UMIDA ALIJONOVNA
Tashkent State Technic University Tashkent, Uzbekistan
Title: Hetero-compound polymer materials based on mechanic-chemical modification of epoxide and furan-epoxide oligomers

Biography: ZiyamukhamedovaUmida is professor and head of Material Science Division of the Tashkent State Technical University, who supervises research work of Research Assistants, Master’s and gifted students In 2003 defended dissertation with specialty Material Science in Machinery and awarded PhD degree in technical science. Since 2008,sheworked as an Associate Professor at Oil and Gaz Processing Technology Division. Actively led fundamental and research grants as Research Supervisor, and actively participated in University, National and International scientific conferences. UmidaZiyamukhahmedova is an author of more than 100 scientific-methodic publications, including: one book, one handbook, three guidance manuals, three certificates for programming support, two Patents of Uzbekistan, one State Standard of the Republic of Uzbekistan. Defended Doctoral dissertation in 2015.

Abstract: Modern polymer composite materials are hetero-phase compositions with a new combination of properties different from the properties of the initial components, but preserving their individuality. The combination of polymers with fillers allows obtaining materials with completely new technological and operational properties, particularly, with high mechanical resistance. This composition is a dispersion consisting of a polymer matrix with filler solid particles distributed inside. Therefore, thermoset polymers were selectedas polymeric binders, i.e. furan epoxide and epoxide resin, solidified with polyethylene polyamine, providing cold curing. Dibutylphthalatewas selected asa plasticizer,and gossypol resin as a chemical modifier. The process of formation of hetero composite coatings under the natural solar radiation, which significantly (twice or thrice) accelerates the curing, was examined. It was determined that polyethylene polyamine in the content does not affect the curing process. The study developed the optimal structure and composition of epoxide and furan-epoxide hetero composites using mechanically activated mineral fillers. Transition metal oxides, contained in natural minerals, form heterogeneous polarized dipole moments, if mechanically activated, and that can formnanocomplex compounds by side functional groups of the binder and modifier of gossypol resin, with multifunctional properties providing favorable conditions for hetero composites nucleation. The properties of such a system are determined not only by the properties of polymers and filler, but also the nature of the distribution of particles in the matrix volume and interaction processes at the interface. We obtained the results of the researchfor mechanic-chemical method for modifying epoxy composite materials and coatings based on them. It is shown that mechanic-chemically activated components of the composition are the most suitable for pattern formation in the production of composite materials. It was discovered that the modified epoxide hetero composite coatings with mechanically activated mineral filler particles have 25-40% increased mechanical properties.


Timur Saliev
Nazarbayev University, Kazakhstan
Title: Effect of electromagnetic field on antibacterial properties of silver nanoparticles

Biography: Dr. Timur Saliev, MD, PhD, Lead Scientist. Obtained his PhD (Bio-physics) at the University of Dundee (United Kingdom), medical degree (MD) from Tashkent Pediatric Medical Institute (Uzbekistan) with specialization in Anesthesiology & Intensive care; M.Sci. (Bio-physics) obtained from Wageningen University (Netherlands). Areas of his research interests include bio-physics, therapeutic applications of ultrasound and other non-invasive physical modalities, nano-technology, cancer treatment, imaging, drug & gene delivery systems, advanced microscopy, medical robotics, pharmacology, development of medical devices and instruments. Currently Dr. Saliev is supervising projects related to bio-physics at the Center for Life Sciences (Nazarbayev University).

Abstract: To date, many types of bacteria have developed a resistance against the antibacterial agents leading to problems with infection control and severe complications, including impaired wound healing [1-2]. In this regard, application of compounds with intrinsic antibacterial properties (such as noble metals) can be used for suppression bacterial infection [3]. Modern technology allows fabrication of nano-sized particles made of silver. Such nanoparticles can be effectively employed to fight opportunistic bacteria as a part of wound dressings [4-5]. We hypothesized that the antimicrobial activity of silver nanoparticles can be significantly enhanced by applying external electromagnetic field. In this work, we used agar well diffusion method [6-7] in order to test the effect of microwave radiation on antimicrobial activity of silver nanoparticles of various shapes. For this, filter paper discs (5 mm in diameter), containing the samples of nanoparticles at concentration 1000 μg/ml, were placed on the agar surface with culture of Staphylococcus aureus. Benzyl-penicillin was used as a control. Then, Petri dishes were subjected to microwave radiation at 900 MHz and 7500 MHz for 10, 30, and 60 min. The sham group was not exposed to radiation. After exposure, Petri dishes were incubated under suitable conditions. Results showed that benzyl-penicillin was able of suppressing bacterial growth with average diameter inhibition zone of 16 ± 3mm. At the same time, no significant bacterial inhibition caused by silver nanoparticles was observed. However, dishes containing triangular silver nanoparticles demonstrated subtle and non-uniform zones of inhibition not exceeding 8.5 mm (group not exposed to microwave radiation). The largest zone of inhibition was demonstrated in the plates with triangular nanoparticles exposed to electromagnetic field of 7500 MHz (duration of exposure 10 minutes). Interestingly, further increase of exposure time did not lead to enlargement of inhibition zones for all nanoparticles’ shapes.


Nanotechnology-2016 | by: Scientific Future Group