Biography: Prof. Dr. Kreuter studied pharmacy from 1968 to 1971 at the Philipps-University Marburg, Germany. He did his Ph.D. from 1972 to 1974 at the Eidgenössische Technische Hochschule Zürich (ETH, Swiss Federal Institute of Technology) under the supervision of Prof. P. Speiser. His doctoral thesis was honoured with the ETH-Medal. He received his habilitation (D.Sc.) in 1982 at the ETH. In 1977 he worked as a postdoc with Prof. T. Higuchi in Lawrence, Kansas, U.S.A. and in 1979 with Prof. W. I. Higuchi in Ann Arbor, Michigan, U.S.A. In 1983 he was a guest professor at the University of Wisconsin, Madison, U.S.A. 1984 he became associate professor in pharmaceutical technology at the Johann Wolfgang Goethe-University in Frankfurt. Simultaneously he was offered the position of a full professor in pharmaceutical technology in Vienna but remained in Frankfurt. In 1990 he became full professor in Frankfurt. Twice he was dean, 1988/89 and 1997/98. In addition, from 1987 to 1990 he was Governor of the Controlled Release Society. He is recipient of the APV-Price 1981, the PPD Award of the Japanese Society of Powder Technology 2009, the Takeru and Aja Higuchi Honorary Lecture Award of the Japanese Academy of Pharmaceutical Sciences 2010, the Best Paper Award and the Most Cited Paper Award of the European Journal of Pharmaceutics and Biopharmaceutics in 2000 and in 2012, respectively, and the Jorge Heller Outstanding Paper Award of the Journal of Controlled Release 2009.
Abstract: The blood-brain barrier (BBB) represents an insurmountable obstacle for the delivery of a large number of drugs to the central nervous system (CNS). One of the possibilities to overcome this barrier is drug delivery to the brain using nanoparticles. Drugs that have been transported into the brain and led to a pharmacological effect after intravenous injection using this carrier include the hexapeptide dalargin, the dipeptide kyotorphin, loperamide, tubocurarine, doxorubicin, and the NMDA receptor antagonists MRZ 2/576 and MRZ 2/596. To achieve a significant transport across the blood-brain barrier the coating of the nanoparticles with polysorbate 80 (Tween® 80) was a key factor.
Experiments with the extremely aggressive glioblastoma 101/8 transplanted intracranially showed a long term survival for 6 months of up to 40 % of the rats after intravenous injection of the polysorbate 80-coated nanoparticle preparation. The surviving animals showed a total remission by histological investigation. Untreated controls died within 10 - 20 days, the animals in the doxorubicin control and uncoated doxorubicin nanoparticle groups died between 10 – 50 days.
The mechanism of the drug transport across the blood-brain barrier with the nanoparticles appears to be endocytotic uptake by the brain capillary endothelial cells followed either by release of the drugs in these cells and diffusion into the brain or by transcytosis. After injection of the nanoparticles, apolipoproteins A-I or E adsorb on the particles surface promoting the interaction with receptors on the endothelial cells followed by endocytotis and thus would the uptake of naturally occurring lipoprotein particles. This hypothesis was supported by the achievement of an antinociceptive effect with loperamide-loaded albumin nanoparticles with covalently bound apo E and by electron microscopy.
The cardiac, and testicular toxicity of doxorubicin was very significantly reduced by binding the drug to poly(butyl cyanoacrylate). In addition the haematological and liver toxicity could be reduced. Coating of PBCA nanoparticles with polysorbate 80 contributed to the reduction of the toxicity. The lower toxicity of the nanoparticle formulations can be most probably explained by the altered biodistribution of the drug mediated by the nanoparticles. Indication of short-term neurotoxicity were entirely absent in the rats on day 12 as well as in long-term survivors.
Similar nanoparticles loaded with doxorubicin were manufactured using poly-(lactic-co-glycolic acid) (PLGA) and tested in humans in a Clinical Phase I trial. The nanoparticles were well tolerated and are now tested in Clinical Phase II against glioblastomas.
Biography: Allan is an expert on metamaterials that is now transforming science. Allan holds a Doctor of Science degree from the University of Durham and is responsible for 328 peer-reviewed and other publications, generating 5432 citations. He has been Topical Editor for the Journal of the Optical Society of America B for Metamaterials and Photonic Structures and for the UK Institute of Physics Journal of Optics. Allan is a Fellow of the Optical Society of America, the UK Institute of Physics, and the Institute of Mathematics and its Applications. He is well-known globally, for work on surface plasmons and guided wave optics, nonlinear waves and solitons and nonlinear guided magnetooptic waves in metamaterials.
Abstract: Hyperbolic metamaterials are becoming popular artificial materials that can deploy advanced graphene structures, and uniaxial layered dielectric systems. A major feature is that a layered sub-wavelength system is experimentally attractive and, relatively, easily controlled. New pathways for this sort of hyperbolic metamaterial are revealed here leading to novel behaviour of rogue waves. They show how nonlinearity and elegant magnetooptic control can be readily included, through a novel methodology based around forms of the nonlinear Schrödinger equation [NLS] that include stationary and non-stationary effects. It can be difficult to generate the NLS for hyperbolic metamaterials but the developments shown here, based upon type II hyperbolics, permit the investigation of both temporal and spatial solitons. Additionally, the possibility of terahertz wave amplification in hyperbolic metamaterials, basedupon graphene with inverse population of carriers in the epsilon-near-zero regime is demonstrated. Type II metatamaterials will be fully investigated with the inclusion of nonlinear, non-stationary diffraction and dispersion. These are important, and active, planar hyperbolic metamaterials. New types of soliton interaction devices and a fascinating discussion of rogue waves will be presented. It is shown that the optic axis must always be in a carefully frozen position, for all applications. Indeed, its position is so dominant that it could overwhelm absorption, for example. Controlled generation of high-intensity single- or multi- rogue waves will be demonstrated by induced modulation instability leading to some new broad-based applications, including biological.
Biography: Erich Sackmann received his Diploma in Physics in 1961 and did his PHD in Physics 1964 with Professor Theodor Förster from the Technical University of Stuttgart. After two years as Member of Technical Staff at Bell Telephone Laboratories in Murray Hill he worked as research assistant at the Max Planck Institute for Biophysical Chemistry in Göttingen .He did his Habilitation in Physical Chemistry at the Univerity of Göttingen.
1974 he became Full Professor of Physics and head of the biophysics department at the University of Ulm. From1980 to 2003 he held the chair of Biological Physics at the Physics Department of the Technical University Munich. He presently works as Professor Emeritus at the Technical University Munich and the Ludwig Maximilian University Munich.
Prof Sackmann served in numerous national and international committees including RIKEN Institute in Japan, Institute Curie Paris, Max Planck Society and Institutes, Minerva Centers, Heräus Foundation, Helmholtz Excellence Programs. He served as founding Editor of “European Biophysic Letters “as editor of Biological Physics Section of “Progress in Physics” and as Advisory Board member of ChemPhysChem. He is presently on the Editorial Board of ActaMaterialiaBiophisica and Physical Review. E
From 1974-1980 he was President of the German Biophysical Society. He was a founding member and chairman of the Biological Physics Section in the German Physical Society (DPG) and from 1989-1991 served as Dean of the Faculty of Physics of the Technical University Munich. From 1988-2000 he served as Chairman of the DFG "Sonderforschungsbereich 266 (Interdisciplinary Research Project): Biological and Artificial Interfaces on Solids".
Abstract: The evolution of the sheer infinite manifold of living beings has been realized with an astonishing small number of molecular species. This was achieved by interplay of physics and genetics and the concept of logistically controlled hierarchical design of complex material,
Many concepts of human rational design of smart materials have been invented during biological evolution. Studying natures design strategies can teach how to design highly sophisticated mechanical structures comprising length scales from nanometer to meters by hierarchical design from nanoscopic modules.
I discussthe physical basis of three outstanding example of natures’ ingenuity as nano-material designer.(i)The formation of materials with outstanding mechanical toughness by cyclic recrystallization of inorganic crystals at charged bio-functional surfaces. (ii)The suppression of the Griffith instabilities by building-up materials from nano-particles.(iii) The rapid switching of rotating direction of bacterial motors by (Martensitic like) solid-solid phase transitions of flagella
Biography: I completed my PhD at the Max-Planck Institute for Polymer Research in Mainz, Germany in 2004. After a short postdoctoral stay as a Marie Curie Fellow at the Institute of Genomics and Molecular and Cellular Biology in Strasbourg, France, in 2005, I accepted a research position at the University of South Australia. I was appointed as a Senior Lecturer in March 2009. In 2010, I was awarded the prestigious Future Fellowship from the Australian Research Council. I was promoted to Associate Professor in January 2012. I have held positions such as Associate Head of School-Research (2012-2013) and Research Education Portfolio Leader (2014-2015). In 2016, I was awarded two prestigious fellowships i.e. the Humboldt Fellowship for Experienced Researchers from the Humboldt Foundation and a Research Fellowship from National Health and Medical Research Council.In 2018, I was elected a Fellow of the Royal Society of Chemistry (FRSC).
In addition to four prestigious research fellowships, I have received various honors and awards. Most recently, I was awarded the John A. Brodie Medal for achievements in Chemical Engineering in 2016 and the International Association of Advanced Materials Medal (IAAM medal) for contributions to the field of Advanced Materials in the year 2017.
I have been awarded research funding in excess of 20 million dollars. I have published more than 170 research papers, reviews and book chapters. I am the inventor of five patents which underpin technologies currently under translation to commercialization.
My research also results in translation of research discoveries to tangible commercial outcomes. A bladder cancer diagnostic technology developed in my laboratory is currently being translated to the manufacturing facility of the industrial partner. This commercial development is supported by a 10 million dollar project funded by the industrial partner and the federal government. In addition to technology transfer, I am also leading a large, 1000 patient clinical trial required for validation of the technology.
Abstract: In my talk, I will present recent developments from my lab on various biomaterial coatings that are facilitated by plasma deposition. These include antibacterial coatings, drug release platforms and cell guidance/capture surfaces.
Undesired bacterial adhesion and subsequent colonisation of medical devices is a substantial medical problem causing complex and sometime fatal infections. We have developed various strategies for generation of antibacterial coatings that can be applied to medical device surfaces. These involve means such as silver nanoparticles, antibiotics, nitric oxide, quaternary ammonium compounds (QACs) or simply coatings that have intrinsic low fouling properties. All these coatings are facilitated by plasma deposition, a technique that provides functional films placed to the surface of any type of material. Important for applications, we not only extensively test our coating for their antibacterial efficacy against medically relevant pathogens but also assess their potential cytotoxicity to mammalian cell and inflammatory consequences. We have also developed methods for the synthesis and surface immobilisation of hybrid antibacterial nanocapsules and nanoparticles, including such capable of triggered release.
In a second part of my talk I outline our work on developing advanced nanoengineered plasma polymer coatings capable of directing cellular behaviour including adhesion, proliferation, differentiation and migration. We have developed unique capabilities to control and tailor entire spectrum of surface properties such as chemistry, wettability, ligand densities, nanomechanics and nanotopography in a substrate independent fashion. We can tailor all these surface properties in a gradient manner too. I will demonstrate how we use surface gradients of nanoparticles density to study the influence of surface nanotopography on the behavior of various cell types, including immune cells and I will outline how we guide the differentiation of stem cells by tailoring surface chemistry, nanotopography or density of signalling molecules.
I will also briefly present drug delivery and release platforms that we have developed including a method for solvent free encapsulation of drug particles. A recently developed device for selective cancer cell capture for complex liquids and how it is used for diagnostic of bladder cancer will also be presented.
Advancements in Materials Science
Materials Processing and Product Manufacturing
Materials Science and Engineering
Materials Science-Fundamentals & Characterization
Biography: Professor D.A.Indeitsev is the corresponding member of RAS. From 2015 he takes the position of the scientific adviser in the Institute for Problems in Mechanical Engineering. At the moment he is also the head of the chair “Mechanics and Control” in St. Petersburg Polytechnic University. He is the member of the editorial board of well-known international journals “Acta Mechnica” and “Reviews on Advanced Materials Science”.
Abstract: The present paper is devoted to the problem of describing materials capable of structural transformations. Basing on two-component model of material with nonlinear internal force, we investigate the existence of non-stable constitutive curve containing a decreasing segment, which is widely used in many papers concerning phase transitions of materials. For this purpose a kinematic loading of two-component rod is considered. The main goal is to determine the influence of the relative displacement on the stress-strain dependence and to establish the expression, connecting the position of the critical point on the diagram with the parameters of the microstructure.
In the second part of the work we consider a non-stationary problem of crystalline lattice transformation under loading. Using the analogy between the continuum equations and the corresponding discrete model, we carry out the investigation of the quenching of a non-stationary wave due to the dissipation of energy into structural conversions and estimate the duration of this process. The obtained analytical results are compared with the numeric calculations performed by finite difference method.
Biography: Christoph Doering was born in Rockenhausen, Germany, in 1978. He received the M.S. and Ph.D. degrees in physics both from TUK, Germany, in 2004 and 2007, respectively. Since 2004, he has been working in the “Integrated Optoelectronics and Microoptics” research group of Prof. Fouckhardt in the Physics Department at TUK. His current research interests focus on integrated optical systems like transverse mode selectors for broad-area lasers, on antimonide-based semiconductor lasers, and on microfluidic devices with optical manipulation and detection. Dr. Döring is a member of the Deutsche Physikalische Gesellschaft (DPG) and the German Chapter of the International Radiation Protection Associ-ation (IRPA).
Abstract: A measurement technique, i.e. reflectance anisotropy spectroscopy (RAS), which had originally been developed for in-situ epitaxial growth control by Aspnes, Harbison et al. [1,2], is employed for in-situ and real-time etch-depth control during reactive ion etching (RIE) of crystalline III/V semiconductor samples here. - Typically temporal optical Fabry-Perot oscillations of the reflected light intensity during etching due to the etch-related shrinking layer thickness are used to monitor the current etch depth. This way etch-depth resolution is better than 20 nm . – Moreover, some preliminary results indicate that for small etch rates, that is below app. 50 nm/min (limited due to the data collection time of the RAS elec-tronics), the resolution might even be one atomic layer. In that case the oscillations would be related to local ordered anisotropies of atomic scale at the crystalline surface, i.e. at the etch front.
Biography: Aexsi Gerasimov obuatined his scientific degrees of Candidate (Ioffe Phys. Tech. Inst. of St.- -Petersburg, 1975) and Doctor of Sciences (I. Kurchatov Inst. Moskou, 1988). He is full professor of Georgian Technical University. He has published more than 200 papers in reputed journals and 4 books. In 1998, International Committee on Scitntific Discovers recognized his work ”Mechanism of exoelectronic emission from solids“ as a scitntific discovery. H is Member of the Academy of Natural Sciences of Georgia and Laureate of the Ilia Vekya Award of the Georgian National Academy of Sciences.
Academician and Professor of Biochemistry and Biotechnology Giorgi Kvesitadze is the President of the Georgian National Academy of Sciences. His Post Doctoral researches were held at University of Pennsylvania, Philadelphia, USA (1978-1979); Lehigh University, Bethlehem, USA (1983-1984); Munich, Max Plank Institute of Biochemistry (1986).
Academician Kvesitadze’s main field of activities are: Selection and characterization of extremophilic microorganisms. Characterization of stable enzymes isolated from microorganisms growing under extreme conditions. Elaboration of new technologies based on the action of microorganisms and their enzymes. Investigation of microorganisms and plants abilities to assimilate and metabolize organic contaminants. Biological control of plant bacterial diseases.
His publication includes: 12 books; 230 scientific publications; 29 inventions; holder of 29 USSR, one USA, two Swiss and one German patents.
Abstract: Based on the experimental data, the paper shows that modern molecular kinetic theory (MKT) is unable to fully explain many phenomena observed in the nanoscale substances but also in the substances of ordinary size. We propose new physical interpretations that do not have this disadvantage. Unlike MKT, which considers matter at the atomic and molecular levels, the new molecular-potential theory (MPT) considers matter at a more processional electronic level. This is accomplished by the fact that the MPT takes into account the state of chemical bonds between atoms and molecules during the passage of the entire phenomenon. These states are described by corresponding energy levels, which in condensed media are combined into the bonding antibonding energy zones. It is taken into account that the electrons that participate in chemical bonding can be in two states: bonding state antibonding. Electrons in antibonding zone and holes in the bonding zone are called antibonding quasi-particles (AQP). Electron transfer from the bonding to antibonding zone means the formation of AQP which weakens the chemical bonds between atoms in the vicinity of which they will be situated during their chaotic movement. The greater AQP concentration, the greater is the probability of changing the location of atoms. The concentration of AQP can be varied both by temperature and a thermal way and in the nanoscale size by the decrease of the sample sizes. The latter opens up new technological opportunities. The examples confirming the above viewpoints are given.
Biography: Dr. Shrenivas S. Ashrit (Ph.D: Chemistry) has been contributing to the field of production of value added products from LD slag and other by-products of the integrated Steel industry. His research articles have been published in New Journal of Chemistry (RSC), Current Science, Metallurgical Research & Technology and other journals of repute. His doctoral work was based on economic utilization of LD Slag fines generated in an integrated steel plant for synthesis of chemicals of industrial importance.
Abstract: Nano sized crystallites of hematite containing calcium rich hydroxyapatite [CRHAP] were synthesized by cost effective co-precipitation of the leach liquor obtained by hydrometallurgical treatment of LD Slag fines with concentrated nitric acid. Leached liquor comprising mainly a mixture of iron nitrate and calcium nitrate was taken for the synthesis of hematite based calcium hydroxyapatite. The present study presents the innovative use of LD Slag fines (steelmaking slag) as a raw material for synthesis of the hematite based calcium rich hydroxyapatite nano material. The basis for this innovative synthesis process was the high calcium, iron and phosphorus content of LD slag. In this hydrometallurgical process, the silica rich material can also be separated apart from the production of chemical liquid calcium nitrate which can be directly used as a fertilizer, thus making the process a “zero waste discharge process”. Characterization of the nano material was further conducted using x-ray diffraction, infrared analysis and particle size analysis. X-ray diffraction analysis revealed that the synthesized material was a hematite based hydroxyapatite which was strongly re-confirmed by infrared analysis. The average particle size d(0.5) of the nano material was about 24µm to maximum size d(0.90) is 116µm as determined by a laser particle size analyzer.
Biography: Professor Jian Li is the Vice-Chief Engineer of Wuhan Research Institute of Materials Protection, the Secretary-General of China Tribological Institution and the Vice-Director of State Key Laboratory of Solid Lubrication. His main research interests include tribology, lubrication, Surface Engineering, and the development and evaluation of wear materials.
Prof. Jian Li was born in China in 1957. From 1978 to 1982 he studideHeat Treatment of Metal Material in Hefei University of Technology, China. Then he was trained in tribology in Tribology Institute of Applied Technology (Germany, 1992) andcompleted his postgraduate education on Mechanical Engineering in Xi’an Jiaotong University (1992-1995).
Abstract: In recent years, an increasingly close attention has been given to the environmental safety of the friction units for stern journal bearing of modern ships .This problem can be mostly solved when oil lubrication of friction units is eliminated. One way is to combine a ceramic or metal material with a polymer material as a sliding bearing by using such natural lubricant as seawater [2, 3]. Among various polymers, ultra-high molecular weight polyethylene (UHMWPE) is a representative used in tribological components because of its excellent performance.However, the wear rate of pure UHMWPE increases when the sliding speed is beyond 2 m/s, which restricts the application of seawater lubricated bearings in modern ships . To further improve the wear resistance of pure UHMWPE, many researchers made great efforts to develop UHMWPE-based composites by mixing appropriate fillers in UHMWPE matrix, such as graphite, PTFE, glass fiber, carbon fiber, nano-diamond and ceramic particles . Hereinto, polyimide, can be used because of excellent mechanical and insulating properties, good thermal stability and chemical inertness, high wear resistance and radiation resistance .
In this work, polyimide modified UHMWPE blends were prepared by hot-press molding process. After careful consideration of the melting and degradation temperatures on the dynamic calorimetric curves of both polymers, the value of the mold temperature for the preparation process was selected at between 310~380°C. Polyimide has a good dispersion in the base phase of UHMWPE when its content is no more than 50%. The surface hardness and compressive elasticity modulus of blends increase markedly with the increase in polyimide content. FTIR absorption spectra indicate that the oxidation and degradation ratio of polyimide and UHMWPE during molding process are both below 1%. Investigation of the tribological properties on a pin-on-disc contact tribometer during high-speed sliding process under seawater lubricatedcondition shows that the friction efficient of composite/bronze sliding pairs decreases with the increase in polyimide proportion; however, the wear rate and optimum surface roughness of polyimide/UHMWPE composites firstly decrease and then increase. Mesoscale simulation results show that phase segregation has important effects on wear mechanism. The composite with 50 wt.% polyimide has the lowest wear rate and optimum surface roughness.
This study was designed to investigate the sliding friction and wear in seawater of UHMWPE composites modified by adding polyimide, so as to acquire some insight into the selection and development of appropriate matching materials for the bushing of seawater lubricated sliding bearings. The results of these experiments here should be used as an estimation of what can be expected for bushing of seawater lubricated sliding bearing using the specific composition.
Biography: Pavel N. Brunkov received the M.S. degree in Physics from Saint Petersburg Polytechnic University, Russia, in 1987 And the Ph.D. and D.Sc. degrees in physics of semiconductors from Ioffe Institute, Saint Petersburg, Russia, in 1992 and 2008, respectively. His current interest includes the study of interaction of AFM tip with different solid state surfaces, the defect engineering in semiconductors and quantum phenomena in semiconductor heterostructures with quantum wells and quantum dots.
Abstract: It was found that the treatment of the atomically flat semiconductor surfaces both in contact and in indentation mode of atomic force microscope (AFM) results in local change of the topography and the surface potential which was measured with Scanning Kelvin Probe Microscopy (SKPM). The value of those changes depends on both the force applied to the AFM tip and its velocity during scanning [1,2]. The phenomena were observed earlier for different type of solid state materials .
The model developed to describe the experimental data revealed that small value of the contact area between the tip of the scanning probe microscope and surface under study (with diameter about 10 nm) allows realizing under the surface the highly strained region. The simulations based on the Molecular Dynamics (MD) showed the formation of the region characterized with high value of the local deformation gradient tensor. The generation of the point defects in the region were described with kinetic concept of the mechanism of fracture of solid state developed by Zhurkov , where stated that the driving force of the of the fracture of solids is the fluctuation of thermal energy. The external stress applied to the surface induces enhancement of the rate of thermal defect production. The model was supported with MD simulation carried out in a wide temperature range. ). Thus the observed change in the surface potential could be due the formation of point defects with deep levels located very close to the n-GaAs surface which change of the energy of the Fermi level pinning. Moreover the generation of point defects very close to the surface results in the local change of the surface topography in nanometer scale.
It was experimentally demonstrated that using contact or nanoindentation mode with the forces below 500 nN applied to the AFM tip with apex size below 50 nm it is possible to remove just single monolayer from atomically flat surface of the epitaxial GaAs layer.
The presented technology could be used to form the shape of solid state surfaces with subnanometer resolution without wet etching processes.
Biography: Xavier Yangkou Mbianda was born in 1960 in Kribi (Cameroon). He received his BSc in Chemistry from the University of Montpellier (France) in 1991 and defended his doctorate thesis on the Synthesis and characterization of Fosfomycin analogues, in the same university in 1995 under the supervision of Professor Henri Jean Cristau. After a post-doctoral research fellowship, followed by a research Associate appointment in the laboratory of Professor TomazModro at the University of Pretoria (South Africa) from 1996 to 2002, he joined the department of Analytical chemistry at the University of Johannesburg, as chemistry lecturer in the department of Applied Chemistry in 2003. He was appointed as Associate professor in the department of Applied chemistry of the same institution in 2012. Prof Mbianda research is directed towards the synthesis and characterization of organo-phosphorus compounds and their application in drug delivery, material composite, and water purification systems.
Abstract: The rapid depletion of clean water resources due to contamination is a great concern worldwide. The development of novel methods or materials able to effectively remove pollutants from wastewater at acceptable levels is a great challenge faced by municipality, industries and water authorities around the world. In this paper we wish to present results of our studies on the synthesis, characterization of phosphorylated multiwall carbon nanotube based nano hybrid materials, and their application in the simultaneous removal of all the three classes of pollutants (organic, inorganic, and pathogenic microorganisms) from wastewaters.
Biography: Dr. González joined Northumbria University as lecturer in 2015 after working in the University of Manchester as a Research associate. Prior to that, he held research positions at the Autonomous University of Barcelona (2011–2013) and at the WPI-AIMR Institute at Tohoku University in Japan (2008–2010). He received a BEng in Mechanical Engineering at the Pontifical Comillas University of Madrid and a BEng in Materials Engineering at the Polytechnic University of Madrid. Afterward, he go this PhD in Materials Physics at Complutense University of Madrid (2004–2008). His PhD Research work was carried out at the National Center for Metallurgical Research (CENIM) in Madrid, Spain.
Abstract: Bulk metallic glasses (BMGs) is a relatively new class of materials with interesting properties such as high wear resistance, but higher values can be attained when it contains certain concentrations of crystalline phases, i.e., bulk metallic glass composites.
Here we present a new strategy for preventing excessive wear rate at high loads in bulk metallic glass composites (BMGCs) by using a Cu45.5Zr51Al3.5 at. % BMGC. Proper selection of a doping element, such as nickel, and its concentration enables to tune the glass transition temperature (Tg) of the alloy so that the friction temperature during sliding, which can be estimated through calculations1, is close to the Tg. Under this condition crystalline phases2 are formed and undergo subsequent oxidation3 (i.e., formation of a lubricating layer) thus preventing massive wear. However, when the friction temperature is much lower than the Tg, the material does not exhibit crystallization and oxidationand therefore it is subject to high wear rate.
Additionally, proper doping was observed to promote the martensitic transformation of the austenitic phase, which also contributes to enhance the wear resistance.
For the three studied alloys, Cu45.5Zr51Al3.5, Cu44.5Zr51Al3.5Ni1 and Cu43.5Zr51Al3.5Ni2 at. %, the mass loss increases with increasing load from 1 to 10 N and the main wear mechanism is governed by delamination. However, the mass loss decreases from 2.6 mg at 10 N to about 2.1 mg at 15 N load due to partial crystallization and oxidation at the highest load.
It can be concluded that proper doping is an effective strategy for preventing excessive wear at high loads and thus can be used to extend the life time of components such and microgears.
Biography: Dr. Simona Bronco received her Master in Chemistry at the University of Pisa in 1994 and her Ph.D. on Natural Science/Chemistry at ETH Zurich in Switzerland in 1997 in homogeneous catalysis. She has actually a permanent position as researcher at Institute for the Chemical and Physical Processes at CNR in Pisa (Italy). She has over 20 years international experience in polymer science including
design, synthesis and characterization of polymeric materials with controlled architecture, morphology and composition on a nano or micrometric scale. She is author of more than 50 scientific papers, chapters in books, and 3 patents.
Abstract: Talking about green building means studying new solutions and materials that can minimize the environmental impact of buildings on the ecosystem. In compliance with the Kyoto protocol, for the reduction of the greenhouse effect that is causing global warming of the planet, also at legislative level the attention to energy saving, even of buildings, is growing in order to decrease the production of greenhouse gases due to the continuous and growing combustion of fossil fuels for energy purposes. The design of enclosures is therefore combined with the research and identification of eco-sustainable materials, which promote energy savings, thus avoiding the dispersion of resources. Innovation has first sought sustainable solutions focusing attention only on the building parameters of buildings, energy saving and environmental impact, currently, however, they are added interest in the health and well-being of people when they are inside the buildings, that is 90% of the time. In this context, the construction sector should no longer be understood as a sector with a high environmental impact due to the high consumption of materials and occupied land, but it becomes fundamental in the circular economy strategies.
In this paper some technological solutions developed in the framework of the Project SELFIE are presented. The SELFIE project aims at the development of new technological components for buildings, in particular elements of the enclosure, with high environmental characteristics that are on the one hand easily adaptable to different types of buildings and different building systems and on the other able to respond to requirements of environmental compatibility in terms of materials and energy. The target is the reduction of both energy consumption and greenhouse gas emissions. This goal is reached by the synthesis, characterization and development of innovative combination of nanostructures.
The attention is focused in this work, on the preparation and investigation of nanocomposite materials starting from poly(vinyl butyral) and antimony-doped tin oxide nanoparticles, known for their infrared light insulating properties. The aim is to obtain heat insulator coating for windows by using different preparative approaches such as solution casting, mixing in the molten state and spray deposition on glasses. All the polymer nanocomposite are characterized and in particular in the 200 –3000 nm spectrum region to verify the near infrared shielding effect. A study of dielectric spectroscopy, 1H Low-Field nuclear magnetic resonance, Fast Field-Cycling relaxometry and solid state nuclear magnetic resonance on poly(vinyl butyral) and its composites is performed to characterize their structural and dynamic microscopic properties.
Abstract: This paper presents an experimental result that improving the properties of concrete prepared with recycled mortar aggregates with nano-SiO2 solution. Five different concentrations of 0, 1.0, 1.5, 2.0 and 2.5% of nano-silica solution were absorbed and vacuum filled into recycled mortar aggregate by atmospheric pressure absorption and vacuum irrigation. The physical properties such as density, crushing index and water absorption of recycled mortar aggregate with and without nano-SiO2 were determined to identify the optimal concentration which was utilized to prepare concrete mixtures. The results show that 2% nano-silica is the optimal concentration for improving the properties of recycled aggregate in both filling methods. Moreover, the vacuum filling method can greatly shorten the time of nano-silica entering recycled aggregate. Furthermore, the workability and compressive strength of the concrete prepared with nano-SiO2 improved recycled aggregate was obvious improvement.
Biography: Dr Sean Perry is a Research Engineer by profession working at the CSIR, specialising AMD/Wastewater Treatment. He completed his Ph.D in 2015.
He is currently a technical leader for a project including the remediation of sulphates and nitrates, His daily activities entails; Technical problem solving Technology implementation on industrial pilot scale Product development, Bead manufacturing process design, Bead manufacturing process optimisation.
Abstract: The environmental application of chitosan supported by sisal to remove Cr (VI) ions from aqueous solutions and Cr6+, Mn2+ and SO4- from AMD was investigated. The experimental conditions that enhance the adsorption of Cr (VI) from aqueous solutions and Cr6+, Mn2+ and SO4- from AMD by sisal/chitosan composite have been analysed. These conditions include the initial concentration of Cr (VI), pH, the dose of adsorbent, contact time and co-existing ions effect. The optimum mass was reached at 1.5 g dosage of sisal/chitosan composite. The research confirmed sisal/chitosan composite is an effective adsorbent for the removal of Cr6+ (aqueous solutions) and Cr6+, Mn2+ and SO4- from AMD. The SC3 has proven to have affinity towards sulphates, manganese and chromium. The average of 97% removal is achieved in all the metals and sulphate. The adsorption of Cr6+, (aqueous solutions) and Cr6+, Mn2+ and SO4- from AMD by sisal/chitosan composite was an exothermic process. Maximum Cr6+, Mn2+ and SO4-removal occurred at pH 2.0. The analysis of ICP revealed that there is 14.01 mg/L of manganese, 80 mg/L chromium and 6534 mg/L of sulphates present in the AMD sample. The maximum adsorption capacity of sisal/chitosan composite (SC3) for Cr (VI), aqueous solutions, removal was found to be 162.3 mg/g and obtained high maximum adsorption capacity of around 200 mg/g for sulphates, manganese and chromium, AMD, at 25 0C respectively. The SEM analysis was performed to confirm the effect of the blend between sisal and chitosancomposite; chitosan is firmly embedded into polymer fibre layer, even though some gaps between the fibre and chitosan were still noticed.
Biography: Beketova Darya received her B.S. (2010) from Department of Natural Sciences, Novosibirsk State University working on design of capillary columns for gas chromatography. Then she worked at Nikolaev Institute of Inorganic Chemistry Siberian Branch of Russian Academy Sciences to study microemulsion crystallization of water-soluble salts in mixture of surfactants receiving her Ph. D. degree in 2014. She has published 5 articles, three of them were published in journals of American Chemical Society. Now she continues to study a behavior of water-soluble salts in reverse micelles and her research focuses on development of productivity of micellar crystallization.
Abstract: Stable highly concentrated organo- and hydrosols of metal, oxide, and salt nanoparticles are promising as inks for printing of microcircuits, optically active media for random lasers, and starting components for the formation of various functional nanomaterials. One of the most popular methods for the production of organosols and ultradispersed powders is a microemulsion (micellar) synthesis. The drawback of the injection-microemulsion synthesis is the low concentration of nanoparticles in the obtained dispersions. Emulsion synthesis permits to obtain microparticles of high productivity. We tried to combine the advantages of both techniques.
Sodium bis-(2-ethylhexyl)sulfosuccinate (AOT), an anionic surfactant, is used as a common micelle-forming agent. Starting reagents were successively introduced into a micellar solution of AOT in n-decane in the dynamic reverse emulsion mode. During the contact of the phases, Ag+ pass into micelles and Na+ pass into emulsion microdroplets through the cation exchange AOTNaOrg+AgNO3Aq=AOTAgOrg+NaNO3Aq. High concentrations of formed NaNO3 and hydrazine in the microdroplets favor an osmotic outflow of water from the micelles, which reduces their polar cavities to ~2 nm. As a result, silver ions are contained in the micelles, and the reducing agent is present mostly in emulsion microdroplets. The reagents interact in the polar cavities of micelles to form ~7 nm Ag nanoparticles. The small size of micelles limits the growth of nanoparticles; the nanoparticles do not coagulate.
The produced nanoparticles are positively charged, which permitted their electrophoretic concentration to obtain liquid concentrates (up to 30% Ag) and solid Ag-AOT composite (up to 75% Ag). Their treatment at 250°C leads to the formation of conductive films (180 mOhm per square). The developed technique makes it possible to increase the productivity by ~30 times and opens up new avenues of practical application for the well-studied microemulsion synthesis.
Biography: Dr. Abdeen Mustafa Omer (BSc, MSc, PhD) is an Associate Researcher at Energy Research Institute (ERI). He obtained both his PhD degree in the Built Environment and Master of Philosophy degree in Renewable Energy Technologies from the University of Nottingham. He is qualified Mechanical Engineer with a proven track record within the water industry and renewable energy technologies. He has been graduated from University of El Menoufia, Egypt, BSc in Mechanical Engineering. His previous experience involved being a member of the research team at the National Council for Research/Energy Research Institute in Sudan and working director of research and development for National Water Equipment Manufacturing Co. Ltd., Sudan. He has been listed in the book WHO’S WHO in the World 2005, 2006, 2007 and 2010. He has published over 300 papers in peer-reviewed journals, 200 review articles, 7 books and 150 chapters in books.
Abstract: Scientifically, it is difficult to predict the relationship between global temperature and greenhouse gas (GHG) concentrations. The climate system contains many processes that will change if warming occurs. Critical processes include heat transfer by winds and tides, the hydrological cycle involving evaporation, precipitation, runoff and groundwater and the formation of clouds, snow, and ice, all of which display enormous natural variability. The equipment and infrastructure for energy supply and use are designed with long lifetimes, and the premature turnover of capital stock involves significant costs. Economic benefits occur if capital stock is replaced with more efficient equipment in step with its normal replacement cycle. Likewise, if opportunities to reduce future emissions are taken in a timely manner, they should be less costly.
Biography: Dr. Florian von Wrochem is principal scientist and project leader at the Materials Science Laboratory of the Sony corporate labs (Stuttgart, Germany). He received his Ph.D. in Physics from the University of Basel in 2007 in parallel with his R&D activities at the Sony Europe. The research in his group is addressing the development of novel organic and molecular electronic devices, e.g. memories and logic circuits for flexible electronics. These activities involve the fabrication and electrical characterization of organic opto-electronic devices at the nano and micro scale, the spectroscopic and topographic investigation of surfaces and interfaces, as well as the design and synthesis of functional materials.
Abstract: Considerable efforts have been undertaken within the past decades to shift organic-based thin-film devices from basic research to the application level. In this talk, avenues toward the realization of organic electronics on the basis of ultrathin functional organic layers are outlined, specifically by leveraging on the self-assembly process at interfaces. In the first part, we show how large area molecular junctions of outstanding robustness can be realized using densely packed molecular metal-terpyridine complex oligomers, which might enable a versatile platform for functional optoelectronic layers.1 In the second part, a new class of self-assembled monolayers2 exhibiting a pronounced intrinsic dipole moment is presented, by which the injection properties in organic semiconductors can be tuned in view of in solar cell and organic memory applications.3 Finally, as an example for biomolecular photoconductors, Sn-cyt c protein layers are shown to act as reversible photo-electrochemical switches upon integration into large area solid state junctions.4The underlying modulation in charge transfer rate is attributed to a hole-transport channel, created by the photoexcitation of the Sn-porphyrin.
Abstract: The nanosized organic and inorganic particles have unique physical and chemical properties and are ideal elements for creating nanostructured materials and devices of different functionality with necessary characteristics for the use in medicine, biology, catalysis, pharmaceuticals, electronics, optics and others.
The original methods of the ultrasonic synthesis of nanocomposites (NPs size 20-100 nm) with a core/coating structure, containing hydroxyapatite , magnetite, and cerium dioxide (fig. 1) will be developed to obtain associates with biologically active substances (BAS) – new 2-arylaminopyrimidine amides for targeted delivery and use as nanocatalysts in reduction reactions (Fig. 1) .
(1) (2) (3)
Fig1. TEM images of the composites (HА)/Fe3O4, (1), CeO2 (2), BАS(Fe3O4)Au (3)
Hollow and gel-containing multilayer microcapsules (protamine/pectin)n and (protamine/pectin-Ag)n (n = 4 and 8) have been obtained using layer-by-layer technique. The possibility of entrapment up to 50 wt.% imatinib methanesulfonate with efficiency of 85.0 ± 6.0% has been shown. The encapsulated form of imatinib allows prolongation its release in an acidic medium (pH 2.0) and phosphate-buffered saline (pH 7.4) for 3-5 hours; in physiological solution (pH 5.5) and an alkaline medium (pH 9.0) for 30 hours. Folic acid conjugated chitosan nanoparticles containing up to 49 wt.% imatinib methanesulfonate have been prepared by ionotropic gelation (Fig. 2). It has been shown that the active ingredient prolonged releases for 5-6 hours in acidic medium, phosphate buffered saline and physiological solution. Entrapment of imatinib methanesulfonate into biopolymer microcapsules and nanoparticles leads to increase in its antitumor activity in comparison with free form up to 9 times. Liposomal form of streptokinase with prolonged thrombolytic effect has been obtained.
Abstract: The nanoparticles has opened up new avenues in many different fields of applications along with other nanomaterials. The major advantages of nanoparticles over larger sized particles are its high surface-to-volume ratio and hence higher surface energy, unique optical, electronic, and excellent magnetic properties and so on. The high surface area also allows it to be modified. The magnetic nanoparticles (MNPs) are playing an important role in the wide range of various applications. At resent MNP with core-shell structures have attracted considerable attention because of their unique properties and various applications. Also, the synthesis of engineered core-shell structures MNP (CSMNP) has attracted practical interest because of potential applications in different areas such as ferrofluids, medical imaging, drug targeting and delivery, cancer therapy, separations, and catalysis.
CSMNP have a core made of a material coated with another material on top of it. CSMNP are a promising system for biomedical applications, because they combine a core (iron) with a high magnetic moment and a shell (iron oxide) with good biocompatibility. In biological applications CSMNP have major advantages over simple nanoparticles leading to the improvement of properties such as less cytotoxicity, increase in dispersibility, bio- and cyto-compatibility, better conjugation with other bioactive molecules, increased thermal and chemical stability and so on. It requires the development of multifunctional nanoparticles with biocompatibility, high relaxivity, high heat-generation power, controlled drug release, and tumor targeting.
Among various methods to the modification or functionalization of the surfaces of CSMNP with materials such as polymers, organic monolayers, oxides, and metals, one of the most important systems involves magnetic nanoparticles coated with gold shells.
This review focuses on the recent progress in synthesis and characterization of engineered magnetic core-shell structures in terms of their fundamentals of magnetism, hyperthermia applications, magnetic resonance imaging, and drug delivery, as well as the synthesis approaches and application examples. Because the quality and surface chemistry play important roles in biomedical applications, this review focuses on the surface modifications of CS nanoparticles. In review are discussing some of the recent findings in the investigation of the synthesis, characterization and application of one intriguing class of CSMNP, i.e., magnetic nanoparticles coated with a gold shell.
Electronic, Optical, and Magnetic Materials
Biomaterials and Polymer Chemistry
Biography: Sadyk Sadykov (July 4, 1949) - Professor, Department of Physics Dagestan State University, Russia.
Author of 70 scientific publications. The field of scientific interests is the electro- and thermophysical properties of ferroelectrics, ferroelectromagnets, multiferroics.
Abstract: The research of the structure, frequency and temperature dependences dielectric properties and ac conductivitiesof Bi1-xSmxFeO3(x = 0, 0.5, 0.1, 0.15, 0.20)ceramics are presented. BSFO ceramics were obtained by cold pressing of nanopowders thermally treated at 600°C. It is shown thatBSFO-5 as well as BFOcrystallizes in rhombohedral structure with R3c space group. XRD analysis of the composition BSFO-10 indicates the presence of a new orthorhombic (space group: Pbam) phase. With a 15% bismuth’s substitution, the crystal structure is completely transformed from rhombohedral to orthorhombic phase.
The measurements dielectric constant (ε), loss tangent (tgδ)and ac conductivity(σac) were carried out in the frequency range 1 kHz – 10 MHz in the temperature range 25 – 600°C. Both components of ε undergo strong frequency dispersion. The intensetemperature growthof the real part ε' begins above 200°C, reaches its a local maximum at ~230°C, and has a frequency-dependent character inherent to relaxors (fig. 1). Its maximum value ε'(T) reaches at ~300°C. Anomalous behavior at 230°C also exhibits tgδ and σac, and is most clearly observed for compositions x = 0.15, 0.2.At room temperature and at a frequency of 1 kHz, ε' increases from 80 (x = 0) to 150 (x = 0.2).
Figure 2 shows the differentconductivitycharacter in different temperature and frequency ranges.
At low frequencies and temperatures above 300°C the conductivity of all BSFO compositions gradually increases up to 600°C. Conductivity is higher for samples with a high samarium concentration. As can be seen from fig. 2(b), the dependence σac(T) for 10 MHz reaches to saturation and passes through a maximum. Moreover, the conductivity maximum temperature is shifted to lower temperatures area with an increase in both the frequency and the percentage content of samarium.
The form of σac(ω) curves for BSFOat different temperatures indicates its thermoactivation character, in which the activation energy EA decreases with increasing frequency. In the investigated temperature rangethis dependence is formed by few overlapping relaxation processes: for BSFO-10from 25 to 160°C with an activation energy EA = 0.35 – 0.016 eV; from 160 to 250°C EA = 0.74 – 0.11 eV; from 250 to 380°C for temperatures EA = 2.36 – 1.56 eV. A significant decrease in conductivity in temperature region above 380°C at frequencies > 1 MHz can be a consequence of a decrease in the mobility of charge carriers, since at these frequencies the charge carriers can not follow after the applied electric field.
The low-frequency conductivity is identified with the dc conductivity (σdc). At frequencies > 100 kHz conductivity behavior can be interpreted in frame of the model of correlated barrier hopping (CBH) of charge carriers.
Biography: MsC in Chemical Engineer from the UJI University in 1998 and PhD, from the same university, in 2008. Member of the “Ceramic Technology” research group since 1997 and, since 2012, teaching and research staff at the Chemical Engineering Department of this same university.
Her research career is focused in the application of the chemical engineering principles to the ceramic materials production processes, which she develops at the research group and the department that she belongs to. Furthermore, she is a member of the collaborating research group “Chemistry of electromagnetic radiation processed materials” between the UJI University and the Spanish National Research Council (CSIC), through the Aragón Materials Science Institute (ICMA), called.
She has collaborated in 38 research projects, funded by public institutions and private companies, resulting in 2 patents, numerous scientific articles in international journals of the ceramic materials field indexed in the Journal Citation Report and several contributions to national and international conferences of the same research field.
Abstract: Ferrite powders containing nickel, zinc and different amounts of copper are typically used as electromagnetic wave absorbers. It is very difficult to control the absorption capacity of a given material, as the attenuation properties of electromagnetic wave absorbers depend on several factors, such as complex permeability, complex permittivity, frequency, and thickness. Moreover, certain magnetic properties such as the saturation magnetic moment depend only on the material’s chemical composition, whereas others, such as permeability loss, also depend on other factors, of which material microstructure is the most critical. Thus, for a material to act satisfactorily as an electromagnetic wave absorber, high sintered relative density (low porosity), little average grain size growth, and narrow grain size distribution width are required.
Numerous studies have shown that the mechanical and/or physical properties of ceramic bodies improve when particle-size distribution decreases from the microscale to the nanoscale. The sintering stage has been study in order to control the evolution of grain growth and densification with sintering temperature when nanoparticles powders are used. The microstructure of the sintered ferrites has been analysed by SEM, determining the grain size distribution, pore size distribution and grain boundary morphology. The imaginary part of complex permeability of the sintered ferrites has been determined and correlated to the microstructure parameters of the sintered bodies. These results have been compared as well with the ones obtained using microparticulated powders.
Biography: Zhiwei Jiao is an Professor at College of sciences, China Jiliang University, Hangzhou 310018, China. Her Research Experience:Working for “The magnetic nanomaterials preparation and magnetic properties investigation “and “Electric Control of Exchange Bias in Multiferroic /Ferromagnetic Films” .
Abstract: Exchange coupling and exchange bias (EB) in ferromagnet (FM)/antiferromagnet (AFM) systems has attracted significant interest due to its complicated physical mechanism and technological application in spintronics. When a FM/AFM system is field-cooled below the Néel temperature (TN) of AFM, the hysteresis loop of FM can shift horizontally along the field axis by an amount, accompanied by an enhanced coercivity (HC). This phenomenon is called exchange bias effect, and the magnitude of the shift is named as exchange bias field (HE).
Magnetic properties of Tb/Cr/Ta film which the Curie temperature (TC) of ferromagnetic Tb is much lower than the Néel temperature (TN) of antiferromagnetic Cr have been investigated. At high temperatures, the exchange bias field HE and the coercivity HC of the film show unusual temperature dependence as shown in Fig.1. As the temperature increases from TC to TN, HE still exists and its sign changes from negative to positive. At T > TN, HE turns to vanish. The coercivity HC exists not only at TC < T < TN, but also above TN. These unusual results can be discussed in terms of the effect induced by the antiferromagnetic Cr spins with commensurate spin-density wave structures. Additionally, the magnitude of cooling field has a strong effect on HE, which probably results from the competition between the exchange coupling energy at the Tb/Cr interface and the Zeeman energy of the Cr surface magnetization.
We believe that these observations provide a significant breakthrough in the exchange bias mechanism and the control of magnetization by exchange bias.
Biography: Tahir Djumshud Ibragimov has completed his PhD in the year 1987 from Institute of Physics of Azerbaijan National Academy of Sciences. He is the leading researcher of Institute of Physics of Azerbaijan National Academy of Sciences. He has published more than 150 papers in reputed journals. Ibragimov T.D. is the expert on spectroscopy of low-dimentional systems and physics of liquid crystals. The thesis for a doctor's degree theme «Spectroscopy of low-dimetional systems» has been confirmed in 1988 year. In present time he investigates optical effects in colloid-liquid crystal systems. With its direct participation absolutely new effects in similar systems have been opened. For last 5 years he has actively publicated (more than 50 publications) and was the manager of 3 international projects and the basic participant of one. It actively co-operates with leading scientists from the different countries, periodically meets them at conferences and discusses experimental results.
Abstract: Influence of ferroelectric barium titanate particles with average size of 500 nm and 1.0 wt.% on the electro-optic properties of nematic liquid crystal (LC) 4-cyano-4'-pentylbiphenyl (5CB) with positive dielectric anisotropy, the nematic LC mixture (Н37) consisting of 4-methoxybezylidene-4'–butylaniline and 4-ethoxybezylidene-4'–butylaniline and smectic LC 4-hexyloxyphenyl ester of 4'-hexyloxy-3'-nitrobenzoic acid (C2) having negative dielectric anisotropy.
It is shown that the threshold voltage and a rise time of the BaTiO3+5CB colloid improves while a decay time worsens in comparison with the pure 5CB. The inverse trend is observed for the BaTiO3 +H37, namely, the threshold voltage and a rise time increases while a decay time decreases in comparison with the pure H37. The additive of BaTiO3 particles into smectic C2 decreases both the threshold voltage and a switching time.
The experimental results are explained by coupling of the electrical dipole of the ferroelectric particles with the LC director field and formation of local electric fields in the vicinity of these particles. This field orientates dipoles of LC molecules near the particles along electric-field lines. With further increase in the field intensity, the dipoles of particles together with the nearest LC molecules turn under the influence of the field in the aggregate. Thereat, the transition of the LC molecules from homeotropic to planar configuration requires more efforts and less ones to the backward direction than in the pure LC. Situation is opposite for the matrix with negative dielectric anisotropy. In this case, the transition from the initial homeotropic orientation of the LC molecules to planar one is difficult while local electric fields promote the return of the LC molecules to the normal position with respect to substrate surfaces.
Biography: Huliieva Nataliia Mikhailivna is a Senior Lecturer of the Department of Applied Mechanics of the Technical Faculty, Lutsk National Technical University
Abstract: One of the competitive and energy efficient areas of modern materials is usage as starting materials industrial waste sand natural minerals. Recently, for drinking water purification sorbents based on natural minerals (eg, saponite, zeolite, etc) were used. It is appropriate in this case to produce filters based on them using the methods of powder metallurgy, to replace the filter elements from titanium.
Materials of the oretical and experimental studies of porous penetrating material composites saponite−titanium and saponite−aluminumin cluding and without inclusion pore agent are presented in the thesis. Specimenwere made of cylindrical form with height220 mmand with diameter 4 mm. Next dry radial and isostatic pressing within vice clamps500 .. 700 MPawas exercised. Sintering was carried out by SHS process. A characteristic feature of SHS process is the presence of two responses of material−high-melting compound and oxide of reducing metal. The structure of the material depends on many factors: solubility,ratio of relative density, size of the reaction mass, gas pressure. Total time of sinteringin SHS process for composite saponite−titanium 80 sec at temperature 1350 °C, and for composite saponite–aluminum 75,2 sec at1300 °C. The process of burning rate of the obtained material is with in 0,46-3,67 mm/s and pressure range of argon0.5 ... 4 MPa.
Thus, it is proved that the proposed and implemented resource saving technology provides manufacturing of saponite−titanium to purify drinking water and saponite−aluminum to purify industrial and process water. Developed filtering PPM satisfy the requirements of state standards in water supply and also in food and industrial sector.
Biography: I graduated from the radiophysical faculty of the Nizhny Novgorod University (Russia), Doctor of Phys.-math. Sci., Professor, principal researcher of the Institute of Physics of the National Academy of Sciences of Belarus.-Visiting professor of Kent (USA) and Lille (France) universities. Research interests: Composite and smart materials, Metamaterials, Photonic crystals, Solar cells, Electrooptical devices, Displays, Image science. The results are published in two monographs, seven chapters in the books, more than 300 articles in scientific journals, and 19 patents.-Member of the International Committee for Imaging Science; International Liquid Crystal Society; Society for Information Displays. Associate editor of the “Optical Journal”.
Abstract: The ordered structures of particles are widely used in creation of photonic crystals, synthetic opals, antireflection coatings, transmission and reflection filters, diffusers, detectors, resonators, lasers, solar cells, light-emitting diodes, etc.
There is a solution  for determining coherent (directly transmitted and specularly reflected) component of radiation scattered by a short-range ordered particulate monolayer. It takes into account the multiple scattering of waves and is based on the quasicrystalline approximation (QSA) proposed by Lax . In many cases (for example, in optimization of light absorption by solar cells) it is important to know not only the coherent, but also the incoherent (diffuse) component of light. The solutions to this problem obtained in the single scattering approximation (SSA) and in the interference approximation  are known. In these approximations, the monolayer is treated as a system of independent scatterers: each particle is in the field of only the incident wave. The regions of their applicability are limited by small relative refractive indices, low concentrations, and/or large sizes of particles; because they do not take into account multiple scattering of waves.
In this presentation we report the method to solve the considered problem, which takes into account multiple scattering of waves in the two dimensional layer (monolayer)  of particles. It gives the solution for coherent and incoherent (scattered) parts of the transmitted and reflected light. We analyzed angular distribution and absorption of light by the monolayer of c-Si particles as applied to the enhancement of radiation harvesting in the solar cells . The results for layers with the short range spatial order and layers with imperfect long range order (layers with the imperfect lattice ) are presented. They are in good agreement with the known theoretical and experimental data [7,8].
Biography: Dr. Srivastava did his Ph.D. degree in Mechanical Engineering from IIT(BHU), India. Also, did post Docs from University of Bath, UK, QMW, London and MPA, University of Stuttgart, Germany). He involved in the research area of ceramic to nanocomposites and published more than 167 papers in international journals. Collaborated various bilateral international projects with UK, USA, Germany, Australia, and Japan. Received Royal Society awarddistinguished fellowship in Royal Academic of Engineering-2018. FOUNDER PRESIDENT of “ICRACM SERIES” international conference
Abstract: An industrial polymer matrix used in fibre composites was modified by nanofillers. Multi walled carbon nanotubes (MWCNTs) filled epoxy resin and graphene nanoplatelets (GnPs) filled short carbon fiber epoxy resin was fabricated for the dynamic mechanical and nanohardness analysis. Experimental results showed a substantial enhancement in the decomposition temperature and nanohardness of nanofillers filled short carbon fiber reinforced epoxy resin composite. The storage modulus, loss modulus and tanδ parameters were dependent on the transition temperature (Tg), which indicates that the elastic modulus of MWCNT/epoxy resin and GnP/epoxy resin composites reduced with the increase of temperature due to the solvent effect. The nanoidentation results showed that elastic modulus of both nanocomposites increased with increase of nanohardness due to change of morphology. The morphology of the nanocomposites was investigated by SEM. It was proved that MWCNT and GnPnanofillers improves the nanofillers dispersion.
Knyazeva Anna graduates Tomsk State University (TGU) in Year 1985. First Russian dissertation (1990) is “Ignition of nontransparent condensed substances through shield with different properties”; second Russian dissertation (1996) is “Coupling models of chemical conversions in solid media with regard to deformation and fracture” From 1996 to 2015 she is professor in TGU; From 2005 she works in Tomsk polytechnic University (TPU). From 1994 г. Senior research, then leading research (1997-2007), and then principal research (from 2007) in Institute of Strength Physics and Material Science SB RAS. From 2005 professor in Tomsk Polytechnic University ; head of laboratory “Modeling of technology processes”. Author more than 500 papers.
Abstract: On of way for nanostructured surface layer formation consists of the surface treatment by high energy electron beam. In these irreversible conditions coupled effects between diffusion, thermal conductivity and deformation processes play a significant role. The systems Mo(Ni) and Ni(Cu) are interested for cross-effects study. First of the system Ni is diffusant that can diffuse along grain boundary. The volume solubility of Ni in Mo is negligible small. Second system is characterized by unlimited mutual solubility, and Cu can diffuse along the grain boundaries and in the grain volume.
In this work, two variants of the model of elements redistribution (dynamic and quasi static) between coating and substrate are studied. First model is one dimensional and includes coupled equations of thermal conductivity, mass transfer and motion. The properties of two layers (coating and substrate) are different. The diffusion, mass transfer under stress gradient, stresses of different physical natures, finiteness of relaxation time for diffusion and heat transfer are taken into account in the model. The interrelation between various waves is studied. Second model can be called quasi static because it neglect relaxation processes. This model is two-dimensional. The individual grain boundary is allocated. Stresses and temperature fields are calculated for chosen systems at the condition of electron beam impulse action. It is demonstrated that elements redistribution happens not only due to temperature growth, but due to mechanical wave influence.
Biography: Kyoichiro Urano graduated from the Department of Chemical Science and Engineering in Osaka University in Japan, and is a Master course first year student in the Division of Chemical Engineering in the Department of Materials Engineering Science in Graduate School of Engineering Science of Osaka University in Japan. His research is about transport phenomena in nanoscale.
Abstract: This study focuses on Marangoni convection driven by surface tension gradient in the flow with a gas-liquid interface in nanoscale. The flow in the nanoscale interface has properties between gaseous and liquid in the nanoscale, and the velocity of the fluid is promoted because the fluid in the interface has lower viscosity than that in the bulk liquid region. In this research, the influences of viscosity on Marangoni convection and the characteristics of the gas-liquid interface were investigated by using the molecular dynamics simulation(MD).
Solutes which have different viscosities are applied to the simulation system, and the shape of the liquid film and the distribution of the gas-liquid interface thickness along the interface are calculated by the MD simulation. The results show that the width of the liquid film reduces around a water-solute boundary when the viscosity of solute is large, and that the interface thickness increases locally around the water-solute boundary. Around the water-solute boundary, the intermolecular interaction reduces and so the interface thickness increases. As the gas-liquid interface thickness increases, the viscosity of the fluid in the interface decreases. It is found that the acceleration of the fluid velocity in nanoscale is caused by the local increase of the gas-liquid interface thickness.