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International Conference on
Materials Science and Research

November 16-18, 2017 | Dubai, UAE

Program Schedule

  • Keynote Speaker

    Time:

    Title

    Title: High Temperature Materials Development for Power Plant used for Electricity Generation

    R G Faulkner
    Loughborough University, UK
    Biography
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    Biography

    R G Faulkner
    Loughborough University, UK

    Professor Roy Faulkner (Loughborough Materials Ltd) has been involved with nuclear reactor materials research for almost three decades. He was employed as a consultant to UKAEA, Harwell from 1980-90, and has led are search group interested in nuclear reactor materials at Loughborough University since 1990, with funding support from Rolls Royce Naval Marine, EDF, Magnox, EPSRC, and Oak Ridge National Laboratories. His interests are in breeder blanket ferritic ODS steel development for fusion, radiation-induced grain boundary segregation of P in Pressure vessel steels, and radiation induced chromium depletion in austenitic steels. Non- irradiation based interests, but still relevant to the current project proposal, are thermally induced chromium depletion modeling and experimental validation in Alloys 600 and 690, modeling and validation of micro structural evolution in ferritic and austenitic steels, and nickel base alloys, and its relation to creep and fracture toughness properties in these alloys. His overall mission is to provide, by modelling, a better understanding of micro structural changes occurring in high alloy steels and nickel based alloys in irradiation and high temperature environments. This mission is supported by a strong experimental expertise in high resolution microscopy techniques, most of which are available in the Loughborough Materials Characterisation Centre. He is Past-President of the East Midlands Metallurgical Society, Chairman of the IOM3 Publications Committee, and past Chairman of the IOM3 Younger Members Committee. He is also Past-Chairman of the Midlands Microanalysis Group.



    Abstract
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    Abstract

    R G Faulkner
    Loughborough University, UK

    Substantial research has been done in recent decades to improve on the basic first choice materials for modern power plant for the production of electricity. Two basic technologies will be reviewed: fossil fuel fired plant; and nuclear plant. For fossil fired plant the most extreme conditions are to be found in the super heaters and top-end boilers. Materials for this application require high temperature (6500C) strength, oxidation resistance, good thermal conductivity, and low thermal expansion. High alloy ferritic steels with 9-12% Cr are used with grade names such as P91 and P92, HT9, or 1.4914. Development has centred on providing better high temperature strength. This has demanded the use of strong carbide forming elements such as Nb and V, and solution strengthening elements such as Mo and W, but higher carbon is avoided because of weldability issues. High nitrogen combines with strong carbide formers to form Z phase, which, along with sigma phase, limits the stress rupture life. This situation can be improved by redistributing the Z phase or other very stable phases such as HfC, in very fine particulate form, producing very high creep life materials. Advanced heat treatments can also improve creep strength in the ferritic steels. Higher temperatures than 6500C are now being considered, and nickel based alloys, such as IN 618 and 740 are the only materials which will offer the combination of high temperature strength and corrosion resistance required. Nuclear plant that have undergone the most extensive materials research in recent times are: 1) the light water fission reactors; and 2) fusion tokamak systems. The light water reactors consist of Zircaloy-clad uranium or plutonium fuel in high pressure water that is contained within a mild steel pressure vessel. These materials have generally performed well in the light water reactors, although there have been some concerns to limit the phosphorus levels in the pressure vessel steels to below 0.001% to prevent embrittling radiation-induced grain boundary phosphorus segregation. Copper precipitation during irradiation at operating temperatures of 3000C has also caused some embrittlement problems. The steam generators have generally relied on Alloys 600 and 690 nickel based alloys. In recent years an alloy more resistant to inter granular stress corrosion cracking, Alloy 625, has been employed. Fusion reactors present perhaps the most formidable conditions for materials of any of the currently considered power plant systems. The first wall constructional material in the test reactor ITER (International Thermonuclear Experimental Reactor) will eventually be a ferritic steel based on the 9% Cr composition of 1.4914 or P92. One materials development that has accompanied the development of ITER is the production of the worlds first reduced activation steel, Eurofer97, which has the long half-life radioactive elements, Co, Ni, Nb and Mo removed. Another development is a novel heat treatment for this steel which reduces the DBTT to acceptably low temperatures (≤ -200C).

    Keynote Speaker

    Time:

    Title

    Title: Lead Pollution Abatement in the Greater Cairo Area

    Zeinab S Safar
    Cairo University, Egypt
    Biography
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    Biography

    Zeinab S Safar
    Cairo University, Egypt

    Dr Zeinab Safar is Emeritus Professor of Mechanical Engineering Department at Cairo University; she had her B.S. degree from Cairo University, M.S. degree and Ph.D from University of Pittsburgh, USA. In addition to Cairo University Dr Safar worked in many universities as visiting professor such as University of California Berkeley, Aachen University and the American University in Cairo. She has more than 80 publications in the areas of Tribology, Energy, and Environment in International Journals and Conferences. Dr. Safar has received the Change Agent Award from ABI and the Community Research Prize from Cairo University. She is a member of the Board of the Electricity Holding Company and the National Committee of Women in Science and Technology in the Academy of Scientific Research.



    Abstract
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    Abstract

    Zeinab S Safar
    Cairo University, Egypt

    Studies that investigate the environmental health risks to Cairo residents showed that lead is one of the areas major health hazards. Several references report ambient lead levels is up to 10 g/m3 in many areas of Cairo and in the range of 10-50 g/m3 in industrial areas. Studies of blood lead levels in Cairo residents report that some children, the most sensitive receptors in the population, have blood lead concentrations up to three times the safe level. Many efforts have been done to reduce the ambient lead concentrations, and contamination with lead in industrial areas. The degree of lead levels in the atmospheric air in the greater Cairo area is discussed, the analysis showed that lead emitted to the atmospheric air was reduced annually from 2669 tons in 1999 to 916 tons in 2001 tons and eventually to 132.55 tons in 2010, also the ambient lead levels were measured during the period of 1999 through 2010, measurements showed that lead concentrations decreased dramatically from 1999 to 2010. The largest change was at industrial area where PM10 lead decreased from 33.7μg/m3 during winter, 1999 to 0.3μg/m3 during summer, 2010. A completed preliminary analysis was done to evaluate the most contaminated site "Lead Smelter" site in terms of its potential to pose risks to people and the environment. During this assessment, soil and water samples were taken and analyzed for various contaminants and preliminary conclusions. High concentrations of lead and other hazardous metals in the soil reaching a maximum value 78 percent render the site heavily polluted, which pose an extreme environmental hazard and serious health problems especially for children. Remediation guidelines for lead smelters is provided and the health risk on the residents of the neighborhood is decreased

    Sessions:
    Materials Chemistry and Physics & Advanced Materials & Computational Materials Science & Mining, Metallurgy and Materials Science & Nano and Biomaterials & Materials in Industry & Synthesis and Architecture of Materials

    Time:

    Title: A Highly Efficient and Durable Electrocatalyst based on N-incorporated into Mesoporous NiO Functionalized Melamine for Glycerol and Methanol Electrooxidation

    Khalil Abdelrazek Khalil
    University of Sharjah, UAE

    Biography
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    Biography

    Khalil Abdelrazek Khalil
    University of Sharjah, UAE

    Prof. Khalil is currently working as a professor and head of the Mechanical Engineering Department at the University of Sharjah. After graduating from Minia University, Faculty of Engineering, in 1990, he worked for three years in Sugar and Integrated Industries Company (SIIC) as a planning and follows up engineer. In July, 1995, he moved from SIIC to work as a demonstrator in Faculty of Energy Engineering, Aswan University, Egypt. In 1996 he completed his Master Degree. In 1998 he was accepted into the Trans-Century Training Program for Talents by the Ministry of Education of China and the Ministry of Higher Education of Egypt as a scholarship student to complete his Ph. D degree. He earned PhD in 2002. He was promoted to Assistant Professor in 2002. He got an opportunity for Postdoc fellowship in Chonbuk National University(CBNU), South Korea from 2004-2005. He was later selected through the Long-Term Foreign Faculty Program for another 2 years in the same University. In 2008, he has been appointed as Associate Professor in Faculty of Engineering, King Saud University. He has published more than 100 ISI papers of international standard with high impact factor in addition to 3 patent and two book chapters. He is also running more than five funded projects. He has promoted to the rank of full professor in both Saudi Arabia and Egypt in 2011.



    Abstract
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    Abstract

    Khalil Abdelrazek Khalil
    University of Sharjah, UAE

    Cost-effective and highly active electro catalysts for alcohols electro oxidation reaction are of great importance in order to widespread the commercial feasibility of fuel cell technology. However, the commercial validity of alcohols fuel cells is significantly hindered owing to the high cost of the noble metal catalysts and concurrent activity degradation. Herein, were report the design of nitrogen doped nickel oxide-porous carbon hybrid as a potential solution to this long standing issue. The embedding of conductive carbon dots into the hierarchal nano architecture is expected to play the decisive role in promoting the electro catalytic performance towards methanol and glycerol electro oxidation and enable better utilization exposed electroactive sites. As a result, the synthesized hybrid show exceptional activity for both methanol and glycerol oxidation reaction due to the synergy of Ni3+/Ni2+ active sites and carbon dots as well as nitrogen species. In addition, the hybrid reveals remarkable durability under periodic reactivation over 80,000 s which is largely attributed to the strong mutual interactions of components leading to fast electrocatalysis and unprecedented durability for methanol oxidation reaction (MOR).

    Time:

    Title: Foaming of Chitosan Generated Under Steady State Flow Condition as a Biobased Material for Bone and Tissular Regeneration

    Cedric Delattre
    University Clermont Auvergne, France

    Biography
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    Biography

    Cedric Delattre
    University Clermont Auvergne, France

    Doctor Cedric Delattre is an associate professor in Biochemistry at Institut Pascal UMR CNRS 6602, France since 2012. He built his experience in biochemistry both in international academic institution (Picardie Jules Verne University, France; Vellore Institute of Technology, India) and industrial Setting (Greentech, France). His expertise areas include chemical/synthetic biochemistry, poly- and oligosaccharides biochemistry, enzymology technologies (development of immobilized enzyme for industrial reactor), functional biomaterial including design and development of bioactive polysaccharides, biorefinery, green chemistry. He is author of 62 scientific papers in international peer-reviewed journals, 5 book chapters, 9 international patents, 41 oral presentations in international conferences, h-index 20.



    Abstract
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    Abstract

    Cedric Delattre
    University Clermont Auvergne, France

    Thanks to its biodegradability and biocompatibility, chitosan (CS) has great potential to be used in bone tissue engineering and drug delivery. Nevertheless, scaffolds made of CS, must be porous to be used in these biomedical applications. Pore size and interconnectivity between pores have an influence on the foam properties like mechanical strength and cell adhesion. However, when foaming occurs in batch, as the gas comes from the sky of the vessel the control of the density and the pore size distribution will be difficult. The present work aims to study the foaming ability of CS solution alone and with hydroxyapatite (Hap)/Tetraethylorthosilicate (TEOS) under steady state flow conditions. A jacketed Narrow Annular Gap Unit (NAGU) system was used for continuous foaming study. CS mixtures and gas were introduced at the bottom of the unit. Mixture flow rate was maintained at 30 ml/min. To obtain foam with different density, gas flow rate was changed from 10 to 70 mL/min. Temperature was maintained constant by the circulation of glycol solution in the jacketed unit. Foaming experiments were carried out using a CS solution and Tween 20 as foaming agent. The experiments were investigated with CS alone or in the presence of Hap and/or TEOS as source of calcium and silice respectively. The influence of operating conditions: gas/liquid flow rates, rotation speed on the density and porosity of final material were studied. The aim is to afford a sample process permitting to obtain reproducible biomaterial with a desired porosity and density for bone and tissular regeneration. Samples were collected for foams analysis (density, bubbles sizes distribution) and freeze dried for mechanical and porosity analysis (DMA, SEM). It was shown that continuous foaming process could be efficiently used to generate new biomaterial with controlled density/porosity as ceramic-like foam.

    Time:

    Title: Tailor-making materialsfor 100-nm thin inorganic solar cells

    Clas Persson
    University of Oslo, Norway

    Biography
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    Biography

    Clas Persson
    University of Oslo, Norway

    Clas Persson, graduated in materials science at Linkoping University in 1999. Postdoctor at National Renewable Energy Laboratory, USA, thereafter assistant professor 2004 at KTH Royal Institute of Technology, Stockholm. Since 2011, professor at Department of Physics, University of Oslo in Norway and at the same time, since 2007, associate professor at KTH. His research involves first-principles atomistic modeling of semiconductors for clean energy technologies, and also code development for analyzing materials. He has over 200 publications as collaborative works together with more than 250 researchers at 90 research groups world-wide, and he has supervised twenty postdoctors and research students.



    Abstract
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    Abstract

    Clas Persson
    University of Oslo, Norway

    Emerging Cu-based materials are explored to benefit from the energetically high-lying Cu d-state in combination with low effective mass of the minority carriers. Materials with higher functionality open for ultrathin devices and thereby less raw material usage. In this talk, we discuss the details in the optoelectronic properties of emerging Cu-based chalcogenides, like for instance Cu2(Sn,Ge)S3, Cu3Sb(S,Se)3, Cu3Bi(S,Se)3, and Cu2XSnS4 (X = transition metal atom), theoretically analyzed by employing hybrid functionals within the density functional theory. For example, we demonstrate that the band-gap energy Eg of CuSb(Se,Te)2can be optimized for high energy conversion in ultrathin photovoltaic devices, and that the alloys then exhibit excellent optical properties, especially for tellurium rich CuSb(Se1-xTex)2. This is explained by multi-valley band structure with flat energy dispersions, mainly due to the localized character of the Sb/Bi p-like conduction band states. Still the effective electron mass is reasonable small for CuSbTe2. The absorption coefficient α(ω) for CuSb(Se1-xTex)2 is at ħω = Eg + 1 eV as much as 5 to 7 times larger than α(ω) for traditional thin-film absorber materials. Auger recombination does limit the efficiency if the carrier concentration becomes too high, and this effect needs to be suppressed. However with high absorptivity, the alloys can be utilized for extremely thin inorganic solar cells with the maximum efficiency ηmax ≈ 25% even for film thicknesses d ≈ 50 to 150 nm, and the efficiency increases to ~30% if the Auger effect is diminished.The results help to understand fundamental physics of the Cu-based compounds in order to design and optimize very thin solar-energy devices.

    Time:

    Title: Removal of Chlorine and Chlorinated Organic Compounds from Aqueous Media Using Substrate-Anchored Zero-Valent Bimetals

    Isaac Mwangi
    Kenyatta University, Kenya

    Biography
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    Biography

    Isaac Mwangi
    Kenyatta University, Kenya



    Abstract
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    Abstract

    Isaac Mwangi
    Kenyatta University, Kenya

    Chlorine added to drinking water as a disinfectant is a concern of this generation. This is because chlorine reacts with dissolved organic compounds to form polychlorinated complexes that are carcinogenic. Available methods for the removal of chlorine and chlorinated compounds include adsorption, precipitation, electrolysis and ozonation, but some result in the generation of more toxic compounds. This study explored the use of zero-valent bimetals Fe/Zn for the degradation of chlorinated compounds in water which did not generate toxic by-products. The zero-valent bimetallic material was anchored on a polystyrene waste material as a green method of cleaning the environment. It was prepared through nitration, amination, complexation and reduction. The resulting solid material was characterised using Fourier transform infrared (FTIR). The material was also characterised using XPS which confirmed the presence of metals anchored on the material through complexation. The metals were also found to be present upon reduction to zero valence and even after the degradation process of the chlorinated organic compounds. It was then applied for the removal process. Optimization parameters such initial halideconcentration, effect of time and bimetal dosage variation were established using synthetic water samples. It was found that the substrate-anchored ZVB material had a degradation capacity of 4.532, 5.362 and 4.513 μmol l−1 for 1,2-dichloroethane, 2-chloro-2- methylpropane and 1-chlorobutane, respectively. The material was then applied on real samples sourced from Nairobi. Quantification of chlorine was done using potentiometric methods and the results confirmed that the degradation was first order. The degradation capacities were found to be 2.37±0.01, 3.55±0.01 and 3.72±0.01 in that order.

    Time:

    Title: Identification of Material Parameters in Biological Soft Tissues

    Nizar Harb
    American University in Dubai, UAE

    Biography
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    Biography

    Nizar Harb
    American University in Dubai, UAE

    Dr. Nizar Harb is an assistant professor of mechanical engineering at the American University in Dubai since Fall 2015.He received his Ph.D. in Mechanics in 2013 from the University of Technology of Belfort-Montbeliard, and also a M.Sc in mechanical engineering and design in 2008. His thesis works led to developing novel numerical tools in the context of inverse identification of biomechanical parameters. In 2014, he was assistant professor of mechanical engineering at Higher Engineering School of Mechanics and Aerotechnics (ENSMA), Poitiers, France and was part of research institute Pprime (CNRS). His main field of research is non-linear solid mechanics, biomechanics, metaheuristic optimization and numerical modeling.



    Abstract
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    Abstract

    Nizar Harb
    American University in Dubai, UAE

    Biomechanics is interested in uncovering the link between the structure (nanoscale to milli-scale) of a biological tissue (morphology and histology) to external forces. From a mechanical stand point, properties of these tissues must be determined where an interest is given to load-bearing tissues, bones and connective soft tissues. Collagen fiber-reinforced soft tissues are known to exhibit a complex mechanical behavior that can be separated into a passive response (elastic and inelastic) and an active response (chemical factors, growth and remodeling). In this context, we discuss a behavior law (Holzapfel et al. 2002) that models the mechanical passive behavior of the arterial wall and the related parameter identification problem. It is widely accepted that the instantaneous response (elastic) of collagen fiber-reinforced soft tissues is fairly modelled by employing the hyperelastic theory. As for Long term inelastic response of the tissue, the theory of viscoelasticity gives good results. However, viscoelasticity raises the challenge as the mathematical formulation of a behavior law will lead to a highly non-linear system with many material parameters to be identified. Fung (2002) proposed the quasi-linear viscoelasticity (QLV) theory after observing that certain connective tissues exhibit a strain-rate insensitive response. QLV resides uses a multitude of classical viscoelastic elements (spring and dampers) to cover the insensitivity spectrum of the tissue. This formulation reduces the complexity of the system but leaves us with many material parameters to be identified. Hence, we propose a new parameter identification approach where the formulation of the problem accounts for the strain-rate insensitivity of soft issues. It is then solved using genetic algorithms. Consistent parameter identification results are obtained despite the non-linearity of these mechanical models.

    Time:

    Title: Computational Design and Functionalization of 2D Materials and their Heterostructures

    Gour Prasad Das
    Indian Association for the Cultivation of Science, India

    Biography
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    Biography

    Gour Prasad Das
    Indian Association for the Cultivation of Science, India

    Dr. G.P. Das is a condensed matter physicist and a materials scientist working as a senior professor in the Indian Association for the Cultivation of Science in Kolkata, India. His research interests span a wide cross-section encompassing electronic structure and properties of various kinds of alloys, interfaces, clusters, and nanostructured materials. He has been working on spintronics materials, hydrogen storage materials, two dimensional nanostructures beyond graphene, and various quantum structures. He served as visiting scientist in several institutes abroad viz. Max Planck Institute Stuttgart (Germany), Virginia Commonwealth University, Richmond (USA), Institute of Materials Research, Sendai (Japan), University of New South Wales (Australia).



    Abstract
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    Abstract

    Gour Prasad Das
    Indian Association for the Cultivation of Science, India

    The discovery of Graphene in the beginning of this century, apart from all its superlative properties, marked the beginning of a new class of 2D materials that have been emerging with far reaching potential applications. In spite of all its superlative physical properties, pure Graphene has some serious drawbacks, such as absence of band gap, that limits its usage in devices. 2D nanosheets analogous to graphene, such as h-BN, III-IV-V nanosheets phosphorene, layered transition metal dichalcogenide (MX2, M=TM, X=S, Se, Te) etc. exhibit band gaps that can be tailored by varying the number of layers, by cutting nanoribbons along Zigzag or Armchair edges, by heterostructuring or by chemical functionalization. For example, there is an interesting manifestation of quantum size effect on the electronic behavior of layered VX2 as a function of the number of layers. Many of these quasi-2D TMDCs, grown epitaxially on metallic or semiconducting substrates, result in lattice matched / mismatched heterostructures with different kinds of bonding ranging from weak Van der Waals bonding to relatively stronger ionic/covalent bonding. Physical and chemical properties of such overlayers often get modulated by the sub-surface layers of the corresponding substrates, leading to manifestation of new properties. In this talk, I shall discuss how density functional theory (DFT) based first principles simulation can be used in designing different classes of 2D materials and also to functionalize these for various applications in materials science, catalysis and device physics. Finally, I shall highlight the increasing relevance of combining machine learning and combinatorial techniques with DFT data base on 2D and quasi-2D materials.

    Time:

    Title: Frictional Behavior of Ferro Fluid Lubricants in Misaligned Journal Bearings

    Zeinab S Safar
    Cairo University, Egypt

    Biography
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    Biography

    Zeinab S Safar
    Cairo University, Egypt

    Dr Zeinab Safar is Emeritus Professor of Mechanical Engineering Department at Cairo University; she had her B.S. degree from Cairo University, M.S. degree and Ph.D from University of Pittsburgh, USA. In addition to Cairo University Dr Safar worked in many universities as visiting professor such as University of California Berkeley, Aachen University and the American University in Cairo. She has more than 80 publications in the areas of Tribology, Energy, and Environment in International Journals and Conferences. Dr. Safar has received the Change Agent Award from ABI and the Community Research Prize from Cairo University. She is a member of the Board of the Electricity Holding Company and the National Committee of Women in Science and Technology in the Academy of Scientific Research.



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    Abstract

    Zeinab S Safar
    Cairo University, Egypt

    In this work the analysis of ferro fluid lubricants in a journal bearings for maximum allowable alignment with length to diameter ration of one. Based on the momentum and continuity equation a pressure differential equation was obtained taking into consideration that the misalignment of the journal axis is allowed to vary up to the axial plane containing the load vector. Assuming linear behavior for the magnetic material of the ferro fluid the magnetic pressure was incorporated into the Reynolds equation. The modified Reynolds equation was solved by finite difference for both axial and spiral inlet oil conditions. The results show that the bearing behavior was significantly affected by misalignment. At low eccentricity ratios the coefficient of friction for magnetic bearing is less than that for conventional one and this decrease is less pronounced as the eccentricity ratio is increased. Also it was found that axial oil groove feeding gives lower coefficient of friction more than spiral one.

    Time:

    Title: Three-Dimensional Nanostructures for Bio-Photonics and Neural Engineering

    Francesco De Angelis
    Istituto Italiano di Tecnologia, Italy

    Biography
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    Biography

    Francesco De Angelis
    Istituto Italiano di Tecnologia, Italy

    He is currently Senior Scientist at the Italian Institute of Technology and Supervisor of Nanostructure Facility (clean room). He leads the Plasmon technology Unit (about 25 members) and his main expertise relies on micro and nano-optical devices for biomedical applications. He currently holds an IDEAS-ERC Consolidator grant whose aim is to develop radically new interfaces between electrical/optical devices and neuronal networks. He published more than 100 papers on peer-review impacted journals



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    Abstract

    Francesco De Angelis
    Istituto Italiano di Tecnologia, Italy

    In the last years we introduced different 3D nanostructures and devices for managing the electromagnetic field at the nanoscales through the generation of surface plasmons polaritons. Firstly, we will briefly revise our past achievements concerning 3D plasmonic nanostructures and their applications to bio-sensing. Secondly, we will show our recent achievements and future perspectives of plasmonic nanopores for next generation sequencing of DNA and protein (European Project FET-Open Proseqo, GA N�687089). In the final part we will present the exploitation of 3D nano-devices in combination with CMOS arrays for intracellular recording of action potentials in mammalian neurons and intracellular delivery of biomolecules, genic materials and nanoparticles. Also, the active interaction of the cell membrane with such 3D devices will be discussed. The developed platform may enable significant advances in the investigation of the neuronal code, development of artificial retinas and low-cost in-vitro platforms devoted to the pharmacological screening of drugs for the central nervous system. As future perspective we will also discuss potential application of our system for the investigation of electrical activities of plant roots that in the near future may revolutionize plant biology. This project is supported by the European Community through the IDEAS grant program (Neuroplasmonics, GA N� 616213).

    Time:

    Title: Directional Templating of Anisotropic Nanoparticles using Poly (pyromelliticdianhydride-p-phenylene diamine)

    Wunmi Sadik
    State University of New York at Binghamton, USA

    Biography
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    Biography

    Wunmi Sadik
    State University of New York at Binghamton, USA

    Dr. Omowunmi Sadik is a Professor of Chemistry & Director, Center for Advanced Sensors & Environmental Systems at the State University of New York at Binghamton (SUNY-Binghamton). Professor Sadik is a recognized leader in biosensors and sustainable nanotechnology. Dr. Sadik holds five U.S. patents for her work on biosensors and nanostructured membranes. Her inventions are helping to drive changes in a variety of clinical, environmental, energy and food safety settings. Dr. Sadik is advancing the concept of sustainable nanotechnology through nanoscale control of synthesis and processing of matter without footprints that give rise to environmental degradation. She has led her team in translating basic research in biosensors to design a prototype of a portable, fully autonomous, and remotely operated sensing device, known as Ultra-Sensitive Portable Capillary (U-PAC) Sensor.Sadik is promoting the responsible growth of nanotechnology around the world through research, education and outreach. Sadik is the co-author of over 165 publications and has given over 350 invited lectures and conference contributions world-wide.



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    Abstract

    Wunmi Sadik
    State University of New York at Binghamton, USA

    Research into anisotropic nanomaterials has significantly increased due to their potential applications in cancer cell imaging, surface enhanced Raman scattering, sensors, optical contrast agent, photochemical cancer therapy among other applications. Anisotropic nanomaterials are a class of materials whose structures, properties, and functions are direction-dependent. This presentation will focus onthe use of poly (pyromelliticdianhydride-p-phenylene diamine) (PPDD)as a reducing & stabilizing agent, immobilization matrix, and directional template for the synthesis of anisotropic silver nanoparticles (AgNPs).It will also discuss a new physical insight into the mechanisms of directional templating of anisotropic nanoparticles based on diffusion limited aggregate model and coalescence growth mechanism. Molecular dynamics (MD) simulations and density functional theory (DFT) calculations were performed to provide insight into possible conformation of PPDD monomer. Anisotropic (non-spherical) peanut-shaped, nanorods and dendritic nanostructures were prepared in situ using varying concentrations of precursors from 0.1% w/v to 1.0 % w/v within PPDD matrix. The PPDD served as the reducing and directional template, thus enforcing preferential orientation. The mechanism of formation and growth of the polymer-mediated anisotropic nanoparticles was confirmed using transmission electron microscopy (TEM), UV-vis near-infrared absorption spectra(UV-vis-NIR), and X-ray diffraction (XRD).

    Time:

    Title: Doxorubicin-Loaded Dendritic Fe3o4 Nanoparticles for Magnetic Drug Targeting and Tumor Regression in Murine Melanoma Model

    Dhirendra Bahadur
    IIT Bombay, India

    Biography
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    Biography

    Dhirendra Bahadur
    IIT Bombay, India

    Dr. Dhirendra Bahadur is at present an emeritus fellow at the department of Metallurgical Engineering and Materials Science at IIT, Bombay. Before this, he was professor and institute chair professor for several years. He served at various capacities at IIT, Kanpur and IIT, Bombay between 1978 and present. He was a visiting fellow of the Royal society London- INSA exchange program and worked at Cavendish Laboratory, 1985-86. He was also visiting scientist at, Dalhousie University, Halifax, NS, Canada between 1987 and 1988 and guest scientist at Forshungzentrum Juelich, Germany several times between 1995 and 2002. During the period 2006-2007 he was at, ICMCB, Bordeaux, France and served as Associate Director, Research. Professor Bahadur present research interests are in the area of nanostructured oxide materials their hybrids, graphene and its composites, magnetic materials at nano scale and their applications particularly in cancer theranostics, drug stabilization and targeted delivery, water purification, photocatalysis and sensing.



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    Abstract

    Dhirendra Bahadur
    IIT Bombay, India

    Recent in vitro studies suggest that dendritic Fe3O4 nanoparticles (DMNPs) are promising platforms for improved cancer therapeutics. A major challenge in stepping up the successful in vitro therapies to in vivo scenarios is the uncontrolled bio distribution. To overcome this limitation, magnetic drug targeting (MDT) presents itself as a promising alternative. Though a variety of magnetic nanosystems are being explored, dendrimer functionalized magnetic nanoparticles have not yet been evaluated as a platforms for MDT. The current work, thus, demonstrates the delivery of DOX-loaded DMNPs by MDT and their tumor regression efficacy towards the syngeneic melanoma mouse model in C57BL/6 mice. The study also presents a comparative evaluation of widely used PAMAM-based nanosystem with an as-prepared peptide dendrimer-based nanosystem and establishes the supremacy of the latter. It was observed that the cellular uptake by the melanoma cells (B16F10) was facilitated by the application of external magnetic field. The internalization of these DMNPs increased substantially against the control (0.0625±2.24 µg). Only after 6 h of incubation, a significant increase (~7 fold) in iron content was observed in the cells exposed to the magnetic field. The in vivo studies explored the bio-distribution and biocompatibility of both the DMNPs. The hematological, biochemical and histo pathological parameters were seen to be minimally affected. This behavior is also suggestive of little or no toxicity of these nanoparticles to organs and regular bodily functions. These nanoparticles were seen to localize primarily in lungs, liver and spleen suggesting non-specific uptake and their clearance from the systemic circulation. However, in tumor bearing mice, the localization is manipulated by the application of an external magnetic field. We observed substantially higher localization in magnetically targeted tumor (right flank) as compared to passive localization in thigh muscles (right flank) of non-tumor bearing mice. It caused a significant increase in the iron levels (161 µg of Fe/mg dry organ weight) in the tumor as against the meager levels of iron in the animals of control group (<25 µg of Fe/mg dry organ weight). These elevated levels in the tumor are due to the erratic angiogenesis, which is further facilitated by the external magnetic field. The high localization pattern of DOX-loaded DMNPs led to high concentrations of DOX in the tumor. This in turn, not only reduced the tumor size (regression) significantly but also arrested/inhibited any further tumor growth even at lower number of doses. By the end of second dosing (14th day), the average tumor volume was 55 ± 8.3 mm3 as compared to the control animals in which the tumor volume was seen to be 4794 ± 844 mm3 (~ 88-fold decrease). The tumor was seen to disappear by the end of 20th day post-treatment and a 100% survival rate was observed. In conclusion, it was observed that peptide dendrimer-based Fe3O4 nanoparticles surpassed PAMAM-based nanoparticles in their performance in magnetically-guided delivery and tumor regression in animal model.

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    Title: Valence Band Distribution Studied by GGA and mBJ Approximation in a Comparison with AES and EELS Spectroscopy

    Hamaida Kheira
    University Center BELHADJ Bouchaib, Algeria

    Biography
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    Biography

    Hamaida Kheira
    University Center BELHADJ Bouchaib, Algeria



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    Abstract

    Hamaida Kheira
    University Center BELHADJ Bouchaib, Algeria

    Information on electronic distribution of the valence band and deep levels on In2O3 is very necessary to predict its applications in technological fields. We adopt the computational simulation based on GGA (Generalized Gradient Approximation) and mBJ (modified Becke Johnson) approximations using the Wien2K program to obtain the electron distribution. The valence band involves the hybridization of the s and p states of the indium chemical species and the oxygen in the range 6eV to 0eV. The characteristics related to these states s and p are very discriminated from other characteristics located at low energies linked to the d states of indium in the range 13 eV to 11eV. The calculation results allow us to predict the interband transition. Moreover, the distribution of electrons around the cation (indium) and the anion (oxygen) allows us to determine the ionic character of the chemical bond in the compound In2o3. We confirm these results using AES (Auger Electron Spectroscopy) and EELS (Electron Energy Loss Spectroscopy) electronic spectroscopy characterization methods.

    Time:

    Title: First Principles Calculations of the Structural and Electronic Properties of Matlockite CaFI Compound

    Meriem Harmel
    University Center BELHADJ Bouchaib, Algeria

    Biography
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    Biography

    Meriem Harmel
    University Center BELHADJ Bouchaib, Algeria



    Abstract
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    Abstract

    Meriem Harmel
    University Center BELHADJ Bouchaib, Algeria

    The full potential linearized augmented plane wave (FP-LAPW) method within density functional theory [1] is applied to study, for the first time, the structural and electronic properties of CaFI and to compare them with CaFCl and CaFBr, all compounds belonging to the tetragonal PbFCl structure group with space group P4/nmm. We used the generalized gradient approximation (GGA) [2] based on exchange–correlation energy optimization to calculate the total energy and also the Engel–Vosko GGA formalism, which optimizes the corresponding potential for band structure calculations. Ground state properties such as the lattice parameters, c/a ratio, bulk modulus, pressure derivative of the bulk modulus and cohesive energy are calculated as well as the optimized internal parameters, by relaxing the atomic position in the force directions. The variations of the calculated interatomic distances and angles between different atomic bonds are discussed. CaFCl was found to have a direct band gap at 𝛤 whereas CaFBr and BaFI have indirect band gaps. From these computed bands, all three materials are found to be insulators having band gaps of 6.28, 5.46 and 4.50 eV, respectively. We also calculated the valence charge density and the total density of states at equilibrium volume for each compound. The results are in reasonable agreement with the available experimental data.

    Time:

    Title: Investigating the Valence Band Structure of (Ga,Mn)As

    Intikhab Ulfat
    University of Karachi, Pakistan

    Biography
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    Biography

    Intikhab Ulfat
    University of Karachi, Pakistan



    Abstract
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    Abstract

    Intikhab Ulfat
    University of Karachi, Pakistan

    The origin of ferromagnetism in dilute magnetic semiconductors remains an issue of debate [1]. Two main scenarios are discussed: acceptor induced holes in the host valence band and holes in an impurity band. Experimental evidence for the existence of an impurity band based on optical properties has been presented [2], though later studies suggest that the data are consistent with the valence band model [3]. Support for an impurity band scenario is also obtained from resonant tunneling experiments on quantum well structures [4]. Two other recent studies, one based on channeling in combination with magnetization, transport, and magneto-optical experiments [5], the other on hard X-ray photoemission [6], have come to different conclusions: the first one supporting an impurity band model in which the location of the Fermi level within the impurity band plays a crucial role in determining the Curie temperature (TC), the second emphasizing the coexistence of coupling mechanisms in the impurity band and host valence band models. It is clear that further reliable experimental work is needed to clarify the situation and provide directions for systematic procedures to find the optimally stabilized ferromagnetic state. Our recent work on Mn-doped GaAs has revealed new unexpected features, including a spin polarized energy band with strong in-plane dispersion, extending slightly above the VBM of GaAs. Very surprisingly, similar observations are made above and below the Curie temperature of (Ga,Mn)As (typically 70K for as-grown samples). Since the band structures of the para- and ferromagnetic states are predicted to be distinctly different [7], even if the exchange splitting is very small [3], this result is not compatible with the currently accepted view of (Ga,Mn)As. The combined information gathered so far indicates that there exists a ferromagnetic surface layer on (Ga,Mn)As even at room temperature.

  • Keynote Speaker

    Time:

    Title

    Title: Materials for Energy Storage: An Emerging Scenario

    G. P. Das
    Indian Association for the Cultivation of Science, India
    Biography
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    Biography

    Dr. G.P. Das is a condensed matter physicist and a materials scientist working as a senior professor in the Indian Association for the Cultivation of Science in Kolkata, India. His research interests span a wide cross-section encompassing electronic structure and properties of various kinds of alloys, interfaces, clusters, and nanostructured materials. He has been working on spintronics materials, hydrogen storage materials, two dimensional nanostructures beyond graphene, and various quantum structures. He served as visiting scientist in several institutes abroad viz. Max Planck Institute Stuttgart (Germany), Virginia Commonwealth University, Richmond (USA), Institute of Materials Research, Sendai (Japan), University of New South Wales (Australia).



    Abstract
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    Abstract


    Keynote Speaker

    Time:

    Title

    Title: Structural Behavior of Prefabricated Pad Footing System Designed using Cold Formed Steel Lipped Channel Section

    Mahmood Tahir
    University Technology Malaysia, Malaysia
    Biography
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    Biography

    Prof Ir. Dr Mahmood joined Universiti Teknologi Malaysia (UTM) in May 1985 as Assistant Lecturer “A” after completing his first degree from University of Iowa, USA. He taught diploma students from May 1985 to 1988 before pursuing his Master degree at University of Nebraska Lincoln, USA. After completing his master degree (M.Sc) in Structure Engineering, he continued to serve Faculty of Civil Engineering (FCE), UTM from 1989 to 1993. He continued his study for Ph.D in Jan 1994 at University of Warwick, U.K and managed to complete his study in May 1997. He continued his service with FCE, UTM at Steel Technology Centre as fellow of the centre. In 1999, he managed to get his professional engineer status from Board of Engineers Malaysia. In 2000, he has been appointed as Associate Professor and Director of Steel Technology Centre. In 2008, he has been appointed as full professor. During his involvement in research and publication for the last 25 years, he has published 100 indexed journals and 120 conference papers. He involved in research exhibition at Invention and New Product Exposition (INPEX) 2004, May 12-15, 2004. Pittsburgh, PA USA and managed to won silver medal. He also involved in research exhibition at Innovative and Research Product, 34th International Exhibition of Invention, New Techniques and Product of Geneva 2006 and Malaysia Technology Expo 2006, 23 – 25 Feb 2006, PWTC, K. Lumpur. At both exhibitions, he managed to secure gold medal. His main areas of research are steel structures, composite structures, and concrete structures. He also has registered as member of Institute Engineer Malaysia (MIEM). At present, he is a director of Institute for Smart Infrastructure and Innovative Construction UTM Construction.



    Abstract
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    Abstract


    Sessions:
    Materials for Energy and Environment & Materials Science and Engineering & Ceramics, Polymers and Composite Materials & Nanotechnology in Materials Science & Surface Science and Engineering

    Time:

    Title: Heterogeneous Nucleation Theory Revisited: Effect of Triple Junction Line Energy

    R G Faulkner
    Loughborough University, UK

    Biography
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    Biography

    R G Faulkner
    Loughborough University, UK

    Professor Roy Faulkner (Loughborough Materials Ltd) has been involved with nuclear reactor materials research for almost three decades. He was employed as a consultant to UKAEA, Harwell from 1980-90, and has led are search group interested in nuclear reactor materials at Loughborough University since 1990, with funding support from Rolls Royce Naval Marine, EDF, Magnox, EPSRC, and Oak Ridge National Laboratories. His interests are in breeder blanket ferritic ODS steel development for fusion, radiation-induced grain boundary segregation of P in Pressure vessel steels, and radiation induced chromium depletion in austenitic steels. Non- irradiation based interests, but still relevant to the current project proposal, are thermally induced chromium depletion modeling and experimental validation in Alloys 600 and 690, modeling and validation of micro structural evolution in ferritic and austenitic steels, and nickel base alloys, and its relation to creep and fracture toughness properties in these alloys. His overall mission is to provide, by modelling, a better understanding of micro structural changes occurring in high alloy steels and nickel based alloys in irradiation and high temperature environments. This mission is supported by a strong experimental expertise in high resolution microscopy techniques, most of which are available in the Loughborough Materials Characterisation Centre. He is Past-President of the East Midlands Metallurgical Society, Chairman of the IOM3 Publications Committee, and past Chairman of the IOM3 Younger Members Committee. He is also Past-Chairman of the Midlands Microanalysis Group.



    Abstract
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    Abstract

    R G Faulkner
    Loughborough University, UK

    This paper will re-consider the basic aspects of solid state classical heterogeneous nucleation theory. In particular it will show how recent experimental work that has been able to estimate grain boundary triple junction line energy can be used to supplement the understanding of the energy balance operating during nucleation. This implies that the energy of the newly created interface needs to be recalculated, assuming that the additional line energy of the line surrounding the precipitate in the plane of the boundary is taken into account. Examples will be given of the application of this revised approach to GB precipitate nucleation of cap-shaped particles of chromium carbide in nickel based alloys. It will be shown that original assumed values of the precipitate-matrix interfacial energy for this transformation have to be revised downward for critical nucleus sizes of less than about 10 nm.

    Time:

    Title: Solidification Control of High-Si Ductile Cast Irons

    Iulian Riposan
    Politehnica University of Bucharest, Romania

    Biography
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    Biography

    Iulian Riposan
    Politehnica University of Bucharest, Romania

    Professor, Materials Science and Engineering, POLITEHNICA University of Bucharest, Romania; >300 scientific papers [published in 32 countries]; 35 Papers at American Foundry Society (AFS) / Ductile Iron Society Conferences; 22 Papers at World Foundry Congresses; 16 Papers at World Conferences on Cast Irons; 35 Romanian Patents; AFS International Member; Award of Romanian Science Academy; 2012 American Foundry Society Scientific Merit Award “for advancing the knowledge of the cast iron industry through extensive research and for generously sharing his knowledge and expertise with the industry”;BEST PAPER AWARDS: 63rd World Foundry Congress; 106th and 107th American Foundry Society Congresses.



    Abstract
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    Abstract

    Iulian Riposan
    Politehnica University of Bucharest, Romania

    The new generation ductile iron with up to 6.0% Si exhibits a fully ferritic matrix, which is solution strengthened by silicon. Outstanding advantages of these grades result in their strongly increasing demand, especially in the automotive industry. The strength of ferritic irons is improved or the instability of a mixed ferritic-pearlitic matrix could be replaced with more predictable and controllable ferritic grades. Because of the combination of a high strength and good elongation it is possible to decrease the wall thickness (light weight construction); the hardness and tensile strength is homogenous over the wall thickness. The machining cost is decreased. More than 4.0%Si enhances performance at elevated temperatures by stabilizing the ferritic matrix and forming a silicon-rich surface layer, which inhibits oxidation. Molybdenum additions up to 2%, to more than 3.5%Si, give superior mechanical properties at high temperatures and improved resistance to oxidation. More than 3.0%Si increases the corrosion resistance. Experiments studied the solidification pattern of three ductile iron compositions [2.5%Si; 4%Si and 4%Si-1.6%Mo], by thermal analysis technique. Wedge samples having a different cooling modulus [ASTM A367] and rapidly graphite nodularity testing samples were also produced. Despite that silicon favours chunky graphite formation, effective inoculation decreased the sensitivity to form a dark coloured porous region in the thermal centre of Si-alloyed ductile iron and limited it in Si-Mo ductile irons. Alloying with silicon reduced the carbides sensitiveness for the entire solidification cooling rate range in both un-inoculated and inoculated irons. Without inoculation a supplementary Mo addition drastically decreased the beneficial effect of Si on undercooling. It was found that inoculation is important for high-Si but particularly so for Si-Mo alloyed irons, requiring a high efficiency inoculation procedure.

    Time:

    Title: Oxidation and Thermal Shock Resistances of Altinceramic Thin Coating Deposited by Magnetron Sputtering (Hipims) on Ti-48al-2cr-2nb Intermetallic Alloy

    Oxana Ostrovskaya
    Politecnico di Torino, Italy

    Biography
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    Biography

    Oxana Ostrovskaya
    Politecnico di Torino, Italy

    Oxana Ostrovskaya graduated in chemical technology of refractory non-metal and silicate materials at Belgorod Shukhov State Technological University (Russian Federation) in 2003, and she received her M.S. Degree in Materials Science and Technology from Politecnico di Torino (Italy) in 2014. At present, she is a Ph.D student in Materials Science and Technology at “Politecnico di Torino”, Italy. Currently, her researches focus on Intermetallic Alloys with or within thin protective coating for aerospace applications. Oxana Ostrovskaya co-authored 3 paper articles.



    Abstract
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    Abstract

    Oxana Ostrovskaya
    Politecnico di Torino, Italy

    The intermetallic alloyTi-48Al-2Cr-2Nb is used for fabrication of low pressure turbine blades, because its good mechanical properties, low density and oxidation resistance at high temperature. However, the alloy application is still limited by significant oxidation above 850 °C. A thin AlTiN ceramic coating of about 3 µm, applied by magnetron spattering,can improve the surface oxidation resistance of this intermetallic alloy. The objective of this work is to investigate the integrity and oxidation resistance of TiAlN coating after thermal cycling under oxidizing atmosphere at temperatures up to 850°C and 950°C. Thermal cycling was performed in a burner rig specifically designed to simulate the operating conditions of turbine engine components.

    Time:

    Title: Advanced Plasmonic Luminescent Solar Devices

    Hind Ahmed
    Trinity College, The University of Dublin, Ireland

    Biography
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    Biography

    Hind Ahmed
    Trinity College, The University of Dublin, Ireland

    Dr. Hind Ahmed is a graduate of the prestigious Graduate Studies Program at the Singularity University, NASA AMES, California, USA. She has a strong background in Mathematics, Physics and Engineering with the focus in the area of solar energy research. She holds an Honours degree in Physics, a Postgraduate Diploma in Mathematical Sciences, a Master degree in Material Physics, a Professional Master in Micro/Nano Electromechanical System and a PhD in Physics. She is currently working as a senior research fellow in the Solar Energy Applications group in Trinity College Dublin under ERC Starter grant Plasmonic Enhancement and Directionality of Emission for Advanced Luminescent Solar Devices (PEDAL) which involves the design, development, characterisation and fabrication of large scale plasmonic luminescent down shifting devices for enhancing the efficiency of solar cells.



    Abstract
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    Abstract

    Hind Ahmed
    Trinity College, The University of Dublin, Ireland

    Spectral losses due to limited spectral response represent a fundamental limit to the maximum efficiency achievable by the solar cell. Low energy photons are not absorbed by the solar cell, while high energy photons are not used efficiently and energy is lost via thermalization. Also the dependency on direct normal irradiance (DNI) limits the application of photovoltaic technology in building integrated photovoltaic (BIPV) for climate where diffuse solar radiation is dominate. The potential exists to increase solar cell efficiency by making better use of short wavelength light and concentrating solar radiation using static concentrator. One way to do this is to use a luminescent materials to down shift high energy photons to lower energy photons through energy downshifting and simultaneously concentrating solar radiation. The conversion of the high energy photons to lower energy phones before they interact with the solar cell refer to as luminescent down shifting layer (LDS) and when the energy downshifting combined with solar energy concentration, its known as Luminescent Solar Concentrators (LSC). The LSCs were proposed with the potential of reducing the cost of solar electrical power generation and LDS with the potential of increasing the solar cell efficiency. LSC and LDS suffer from self-absorption, escape cone losses, and scattering losses at higher concentrations of luminescent species hence undermining the efficiency of the device. Some of these losses could be significantly reduced if it were possible to guide the emission directionally and decrease the luminescent species concentration without compromising the total emission in device. A novel approach was proposed to utilize metal nanoparticles with the objective of counteracting these optical loss mechanisms. In this technology, plasmonic coupling between luminescent species and metal nanoparticles has been exploited, resulting in significant enhancement in absorption and fluorescence emission of luminescent species. First, the optimum luminescence species concentration in polymer was established. Subsequently, plasmonic coupling with MNP was introduced and optimum plasmonic coupling determined. The plasmonic interaction was manipulated through variation of the spacing between the luminescence species and MNP and of the surface plasmon resonance (SPR) frequency of MNP. The spacing was controlled by the relative concentration distribution of luminescence species and MNPs. The SPR resonance was determined by controlling the size and shape of the MNPs. Optimised plasmonically enhanced luminescence devices were fabricated and the performance of these devices was experimentally tested on different PV solar cells through optical and electrical characterization. The results have shown significant enhancement in absorption, fluorescence emission and electrical output of PV/plasmonic devices.

    Time:

    Title: Investigation of the Formation Mechanisms of the High Burnup Structure in the Spent Nuclear Fuel ‒ In Situ Experimental Simulation with Using Ion Beams

    Yara Haddad
    Univeristy Paris Sud, France

    Biography
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    Biography

    Yara Haddad
    Univeristy Paris Sud, France

    She is graduated from Jordan University of Science and Technology, Jordan, with a bachelor degree in Nuclear Engineering. Later she completed Master degree in nuclear engineering (M2) in the field of nuclear power design from ENSTA, Paris and she is completing her Ph.D. in physics, in particular physics of materials at University Paris-Sud with an expected degree date of December 2017.



    Abstract
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    Abstract

    Yara Haddad
    Univeristy Paris Sud, France

    Uranium dioxide (UO2) is much-used nuclear fuel over the world especially in light water reactor. It is subjected to significant restructuring processes during its operating life in the reactor core. Although it is well established that uranium dioxide does not become amorphous under irradiation, UO2 exhibits a defective structure, whose specific microstructure depends on several parameters (e.g. local burnup, local temperature, irradiation conditions, nuclear and electric stopping, and incorporated impurities). In particular, a zone located at the peripheral region of the nuclear fuel pellet (100-200 µm extension) submitted to extreme irradiation conditions, leading to grain subdivision and pore formation, referred to as the High Burnup Structure (HBS) focuses attention on the role played by the various parameters either in a separate or in a combined way on the solid destabilization.The main objective of this investigation is to understand the formation mechanisms of the HBS structure and the behavior of a material under irradiation. This goal is achieved experimentally by using a very simplified model - urania single crystals - irradiated with low-energy ions to examine the contributions of ballistic damage and of implanted species to the formation of the HBS structure. Crystals were alternatively (i) implanted at increasing fluence steps with 500-keV Xe or La ions (soluble and insoluble species in UO2, respectively) at 773 K (the temperature at the periphery of the fuel) and (ii) characterized in situ by Rutherford Backscattering Spectrometry in Channeling geometry (RBS/C) and in situ Transmission Electron Microscopy (TEM). Two important steps in the disordering kinetics of the solid were established and they were interpreted in terms of the transition from the formation of isolated defects to extended defects at a low dpa number, and due to the aggregation of impurities when their concentration reaches a critical threshold. This second step was solely observed for the insoluble specie.

    Time:

    Title: Sulfamethoxazole Residues in Vegetables Irrigated with Untreated Wastewater

    Ruth Wanjau
    Kenyatta University, Kenya

    Biography
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    Biography

    Ruth Wanjau
    Kenyatta University, Kenya

    Ruth Wanjau is an Associate Professor of Chemistry Department, Kenyatta University (KU). She did her B.Ed (Sc) and M Sc (Chemistry) in KU and her Ph D in Wuhan University, China. Currently, she is the Chairman, Kiambu County Education Board, Director of Accommodation Services in KU, a mentor to youths in religious, academic and life issues and a motivational speaker. She is a wife and mother of five and a grandmother of two



    Abstract
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    Abstract

    Ruth Wanjau
    Kenyatta University, Kenya

    Untreated waste water is used for growing of vegetables in small scale urban farming. Vegetables grown or irrigated with untreated wastewater may contain high levels of antibiotics residues that are detrimental to health. Sulfamethoxazole (SMX) is an antibiotic, administered in the management of pneumocystis carinii pneumonia, pneumocystis jiroveci pneumonia, toxaplasmosis and genitourinary tract infections in HIV-AIDS patients or in cases of oral thrush infections. It is cheap and readily available over the counter even through self-prescription for management of upper respiratory tract and genitourinary tract infections. The drug is also administered to poultry and livestock as a growth promoter, prophylactic and to control microbial infections. Its presence in vegetables could induce microbial resistance and minimize drug sensitivity. The concentration of sulfamethoxazole in untreated wastewater and vegetables collected during the dry season from various sites in Ruai and Njiru from small scale urban farms along Ngong River was determined. The samples for sulfamethoxazole residues underwent solvent extraction pre-analysis and the extracts were then analyzed using high performance liquid chromatography. The untreated waste water and vegetables were found to have sulfamethoxazole residues.

    Time:

    Title: Surface Morphology Tailoring of Crystalline Polymer Film

    Hyo In Jin
    Jeju National University, Republic of Korea

    Biography
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    Biography

    Hyo In Jin
    Jeju National University, Republic of Korea

    Ms. Hyo In Jin is an undergraduate student at Jeju National University in Korea, and his research interests are semiconductor devices and processes. Prof. Dr Woo Young Kim is an assistant professor at Jeju National University in Korea. His research fields include applications of ferroelectric polymer and graphene process.



    Abstract
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    Abstract

    Hyo In Jin
    Jeju National University, Republic of Korea

    In general, the polymer thin film is formed through a solution process to be fabricated as optical devices or electronic devices. Therefore, the solvent is removed through heat treatment to complete the solid state thin film. However, the surface roughness of the amorphous polymer is kept low, but in the case of the crystalline or semicrystalline polymer, the surface becomes very rough as the crystallization increases. In general, the thicker the film, the greater the roughness becomes. It is necessary to minimize the surface roughness since it adversely affects subsequent processes carried out on the polymer thin film having such a rough surface. In this paper, we describe a method of forming a ferroelectric thin film of semicrystalline and reducing the surface roughness by solution process and plasma process, respectively. The solution process was a double coating method. Through the plasma process, dry etching with appropriate process variables was used. As a result, more flat surface than the initial state was obtained. It is expected that the method presented here will be very helpful for improving the performance of organic optoelectronic devices.

    Time:

    Title: Coercive Voltage Modulation in Ferroelectric Capacitor with Two Sub-Capacitors

    Jin San Kim
    Jeju National University, Republic of Korea

    Biography
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    Biography

    Jin San Kim
    Jeju National University, Republic of Korea

    Mr. Jin SanKim is an undergraduate student at Jeju National University in Korea, and his research interests are semiconductor devices, programming and circuit design. Prof. Dr Woo Young Kim is an assistant professor at Jeju National University in Korea. His research fields include applications of ferroelectric polymer and graphene process.



    Abstract
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    Abstract

    Jin San Kim
    Jeju National University, Republic of Korea

    The ferroelectric material is a material that forms a spontaneous polarization by an electric field or voltage applied from the outside, and is widely applied to a nonvolatile memory device because it maintains a polarization state even when an external stimulus is removed. The polarization of the ferroelectric does not cause polarization reversal below a certain threshold voltage (coercive voltage), but polarization reversalgradually occurs when the voltage exceeds the coercive voltage. Therefore, the coercive voltage is an important criterion for determining the operating voltage in a ferroelectric memory or a switching device. This paper deals with the coercive voltage of a ferroelectric capacitor with two ferroelectric capacitors with different thicknesses. The hysteresis curve was measured by varying the area of the two capacitors. As a result, it was confirmed that the coercive voltage can be modulated according to the area ratio of the two capacitors. Using a ferroelectric with this structure would be advantageous for fabricating devices with arbitrary coercive voltages.

    Time:

    Title: Multi-Bit Memory Devices Based on Ferroelectric Polymer

    Seong Cheol Moon
    Jeju National University, Republic of Korea

    Biography
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    Biography

    Seong Cheol Moon
    Jeju National University, Republic of Korea

    Mr. Seong Cheol Moon is an undergraduate student at Jeju National University in Korea, and his research interests are semiconductor memorydevices. Prof. Dr Woo Young Kim is an assistant professor at Jeju National University in Korea. His research fields include applications of ferroelectric polymer and graphene process.



    Abstract
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    Abstract

    Seong Cheol Moon
    Jeju National University, Republic of Korea

    A multi-bit memory is a memory capable of storing two or more data in one memory cell. In the case of a ferroelectric memory, a voltage variable type multi-bit memory device has been proposed so far. The polarization of the ferroelectric is represented by the average value of the dipole moments inside the thin film, which can be changed by the voltage or electric field applied in the external stimulus. Therefore, it is theoretically possible to store states corresponding to all polarization values from positive residual polarization to negative residual polarization. However, when implemented as an integrated circuit due to process errors and voltage fluctuations, the number of data that can be stored is limited due to reliability. In this paper, we propose a memory cell with twocapacitors of two different thicknesses. Because of the different thicknesses of the capacitors, the variability of polarization due to voltage variation and process error is minimized. The ferroelectric used is a ferroelectric polymer. In addition, various process methods of the proposed structure will be mentioned. The first is the combination of the polymer film patterning and transferring, the second is the patterning and double coating of the polymer thin film, and the third is the same performance by using only the photosensitive polymer film without patterning the ferroelectric polymer film. Particularly, the third demonstration method will be more useful because it does not use vacuum equipment, it improves multi-bit memory productivity and compatibility with large area printing and printing process.

    Time:

    Title: Fabrication and Characterization of Graphene Nonvolatile Memory Device

    Seung Hyeon Kim
    Jeju National University, Republic of Korea

    Biography
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    Biography

    Seung Hyeon Kim
    Jeju National University, Republic of Korea

    Mr. Seung Hyeon Kim is an undergraduate student at Jeju National University in Korea, and his research interests are memory devices and processes. Prof. Dr Woo Young Kim is an assistant professor at Jeju National University in Korea. His research fields include applications of ferroelectric polymer and graphene process.



    Abstract
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    Abstract

    Seung Hyeon Kim
    Jeju National University, Republic of Korea

    Graphene is a material consisting of a single layer of carbon atoms, known to have excellent mechanical and electrical properties. In particular, the adjustment of the doping concentration by chemical adsorption or electrical gating is a very useful method for varying the conductivity of graphene. Graphene can be used as a memory element if this conductivity can be adjusted to more than two states and its adjusted conductivity can be maintained. In this paper, we will demonstrate a memory device that can memorize the conductivity of graphene by grafting ferroelectric polymer with memory characteristics. The graphene memory demonstrated in this paper was fabricated by stacking a graphene - ferroelectric composite film. Since the device can be manufactured only in a desired place, the use amount of the graphene can be reduced, and the type of the substrate may not be affected. In addition, the surface of the ferroelectric polymer layer was modified to improve the memory characteristics. It is expected to be applicable to future flexible and transparent memory devices.

    Time:

    Title: Multi-Bit Memory Device with Multi-Layered Ferroelectric Polymer Film

    Uichang Lee
    Jeju National University, Republic of Korea

    Biography
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    Biography

    Uichang Lee
    Jeju National University, Republic of Korea

    Mr. Uichang Lee is an undergraduate student at Jeju National University in Korea, and his research interests are semiconductor devices and circuit design. Prof. Dr Woo Young Kim is an assistant professor at Jeju National University in Korea. His research fields include applications of ferroelectric polymer and graphene process.



    Abstract
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    Abstract

    Uichang Lee
    Jeju National University, Republic of Korea

    Recently, studies on the improvement of the integration degree of memory devices using ferroelectric polymers have been actively conducted. Methods of increasing integration include horizontal physical scaling, storing multiple bits in a single memory cell, and building a stacked structure. Among them, multi-bit memory is a useful concept to increase the memory capacity with using the existing processes because it can increase the integration degree without reducing the horizontal physical length. In this paper, we point out the problems of the conventional ferroelectric multi - bit memory integration method and propose a multi - bit memory device structure which can improve the degree of integration by using the stacked structure and verify its operation. In addition, the proposed architecture is robust against interference when integrated.

    Time:

    Title: Rheological Properties and Application of High Molecular Weight Polyacrylamidein S and Stabilization In UAE

    Mahmoud Mohsin
    University of Sharjah, UAE

    Biography
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    Biography

    Mahmoud Mohsin
    University of Sharjah, UAE



    Abstract
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    Abstract

    Mahmoud Mohsin
    University of Sharjah, UAE

    Polyacrylamides constitute a class of polymers that can entirely dissolve or swell in water to form a solution or hydrogel respectively. Free radical polymerization of acrylamide monomer, using both solution and inverse-emulsion polymerization, was applied to produce polyacrylamide with various molecular weights. This investigation was focused on the production of polymers with different molecular weights, depending on monomer to initiator ratio. Experimental conditions were designed to produce high molecular weight polymers that can be used in stabilization of sand dunes in the arid regions. Synthesized polyacrylamide samples were characterized using Gel Permeation Chromatography and solution viscosity in order to determine the molecular weights and molecular weights distribution. The rheological behavior was also investigated in different polymer concentrations and at various temperatures using Brookfield Rheometer. Lab-scale wind tunnel was used to determine the stability of the sand before and after treatment with the polymer. Compressive stress-strain test was also used to establish the mechanical behavior of the polymer-sand composite under controlled compressive load up to failure. The results showed that the use of high molecular weight polymer gave excellent mechanical and thermal stability.

    Time:

    Title: Production of Ethyl Alcohol using Sorghum Bicolor grains and Assessment of the Product

    Abdel Moneim Elhadi Sulieman
    University of Hail, Saudi Arabia

    Biography
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    Biography

    Abdel Moneim Elhadi Sulieman
    University of Hail, Saudi Arabia

    Prof. Abdel Moneim has been awarded his PhD in 2001 and pursued a postdoctoral fellowship at the University of Kobe, Japan. He is an expert in Food Science and Technology, his main concern is food microbiology. Prof. Abdel Moneim has authored a large number of articles in reputed journals and has been invited to different international conferences. He published many books in the area of food science and technology. He is a member of many national and international academic associations.



    Abstract
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    Abstract

    Abdel Moneim Elhadi Sulieman
    University of Hail, Saudi Arabia

    The present study was conducted to investigate the production of ethanol from sorghum grains (Feterita) and evaluation of its quality. Proximate chemical composition in terms of protein, crude fiber, moisture, ash, oil and carbohydrate contents were determined in sorghum grains and malted grains flours. The results indicated that sorghum grains flour contained 12.7% protein, 1.6% crude fiber, 5.3% moisture, 1.8% ash, 2.7% oil and 76.1% carbohydrate. On the other hand, malted grains flour contained 13.1% protein, 1.7% crude fiber, 5.5% moisture, 2% ash, 2.8% oil and 74.9% carbohydrate. Malt and pure enzymes (α-amylase and amyloglucosidase) were used to convert the starch to fermentable sugars. The yield of ethanol in fermented mash was 13% in the malt and 16% as a result of using pure enzymes. The ethanol volume produced from sorghum grains by malt and pure enzymes was 33 and 35ml, respectively. The purity, density and viscosity of resulted ethanol were95%, 0.83 gm / ml and 0.99cip, respectively.

  • Sessions:
    Posters

    Time:

    Title: A Study of Cleaning of Fouling Materials on Energy Transfer Surface in Thermal Power Engineering System

    Han Kyu Il
    Pukyong National University, Korea

    Biography
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    Biography

    Han Kyu Il
    Pukyong National University, Korea

    Dr. Kyuil Han received his B.S. Degree in Mechanical Engineering in 1977 from Seoul National University. He received his M.S. Degree in Mechanical Engineering in 1984 from Ohio State University and received a Ph.D. Degree in Mechanical Engineering in 1989 from Colorado State University. Present Kyuil Han is a Professor of Mechanical System Engineering in Pukyong National University in Busan, KOREA. His research Interest field is an efficiency increment of energy transfer for heat exchanging device and thermal power engineering.



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    Abstract

    Han Kyu Il
    Pukyong National University, Korea

    The efficiencies of thermal power system using fossil fuel depend on heat exchangers which extract energy from the exhaust gas before it is expelled to the atmosphere. To increase heat transfer efficiency it is very important to maintain the surface of heat exchanger as clean condition. The accepted skill of cleaning of fouled surface of heat exchanger is soot blowing. A high pressure jet of air is forced through the flat surface of plate to remove the deposit of fouling. There is, however, little knowledge of the fundamental principles of how the jet behave on the surface and how the jet actually removes the deposit. Therefore, the study focuses on the measuring of cleaning area and cleaning dwell time after accumulating the simulated deposit on the flat surface. The deposit test rig was built for the study and simulated deposit material is used after measuring the physical property of the each material by shearing stress test. Much data was obtained for the analysis by the parameters change such as the different jet speed, different inner pressure and variable distance of the jet from the test rig surface. The experimental data was compared with the theoretical equation and most of the data matches well except some extreme cases.

    Time:

    Title: Development of Recycling Process for Recovery of Copper from Wasted Sludge

    Jei Pil Wang
    Pukyong National University, Korea

    Biography
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    Biography

    Jei Pil Wang
    Pukyong National University, Korea

    Based on my knowledge and experience I am now working at Department of Metallurgical Engineering in Pukyong National University as an Associate Professor. I have worked at LS-Nikko Copper Smelting company for one year as a researcher and did various projects including copper smelting, recovery of nickel from smelting dust, and refining of tellurium and selenium etc. Now I am also doing many projects related with fabrication of nanosized metallic powder, recycling process, composite material, corrosion engineering, powder metallurgy, and extractive process.



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    Abstract

    Jei Pil Wang
    Pukyong National University, Korea

    A Recovery of copper from wasted sludge containing copper has been conducted through various processes. The sludge was analyzed by XRD (X-ray diffraction) and it was found to be amorphous phase. The specimen was oxidized in air for 24 hours to transform crystalline phases that are CuO, Cu(SO)4, Ca(SO)4, Fe3O4 and Fe2(H2O4((SO4)2O)(H2O)4. The specimen was placed into alumina crucible and it was placed in reactor. Reduction reaction was conducted by introducing hydrogen gas at 500°C for 2 hours. When reduction was done, the sample was examined by XRD and it was found to be Cu, Fe, Cu(SO)4, Fe2O3, Cu2FeS4. In the long run, copper content in the sludge was increased from 54.30 wt.% to 70.68 wt.%.

    Time:

    Title: Thermogravimetric Investigation on Oxidation Kinetics of Several Ti-Al Alloys

    Oxana Ostrovskaya
    Politecnico di Torino, Italy

    Biography
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    Biography

    Oxana Ostrovskaya
    Politecnico di Torino, Italy

    Oxana Ostrovskaya graduated in chemical technology of refractory non-metal and silicate materials at Belgorod Shukhov State Technological University (Russian Federation) in 2003, and she received her M.S. Degree in Materials Science and Technology from Politecnico di Torino (Italy) in 2014. At present, she is a Ph.D student in Materials Science and Technology at “Politecnico di Torino”, Italy. Currently, her researches focus on Intermetallic Alloys with or within thin protective coating for aerospace applications. Oxana Ostrovskaya co-authored 3 paper articles.



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    Abstract

    Oxana Ostrovskaya
    Politecnico di Torino, Italy

    Bars of Ti-48Al-2Cr-2Nb, Ti-48Al-2Nb-0.7Cr-0.3Si, Ti-43.5Al-4Nb-1Mo and Ti-47Al-2Cr-8Nb alloys were produced by Electron Beam Melting. The oxidation resistance in air of these alloys was investigated in the range of 800-1000 °C. Oxidation tests were performed in TGA equipment under isothermal conditions at different temperatures. The composition of the oxide layers was investigated by XRD, SEM-EDS and XPS. The oxide layers grew according to a parabolic law. The kinetic rate constants and the activation energies were calculated from the TGA results. These kinetic parameters allowed to asses a rank of oxidation resistance, which can be correlated with the composition of the alloys.

    Time:

    Title: Adsorption and Gas-Sensing Characteristics of a Stoichiometric Α-Fe2o3 (0 0 1) Nano Thin Film for Carbon Dioxide and Carbon Monoxide with and without Pre-Adsorbed O2

    Changmin Shi
    Linyi University, China

    Biography
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    Biography

    Changmin Shi
    Linyi University, China

    Changmin Shi was born in May 26, 1986. He received his B.S. degree in Condensed Matter Physics (2010-2015) from ShandongUniversity. At present,he worked as a teacher in Institute of Condensed Matter Physics, School of Physics and Electric Engineering, Linyi University.



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    Abstract

    Changmin Shi
    Linyi University, China

    The adsorption and gas-sensing characteristics of CO2 and CO molecules on stoichiometric α-Fe2O3 (0 0 1) nano-thin film with and without pre-adsorbed O2 molecules had beenstudied using the density functional theory (DFT) method. Without pre-adsorbed O2 molecules, CO2 molecule played as an acceptor and obtains electrons from stoichiometricα-Fe2O3 (0 0 1) nano-thin film. For the O2 pre-adsorptionα-Fe2O3 (0 0 1) nano-thin film system, the CO2 molecule alsoplayedas an acceptor. However, less number of electrons was transferred toCO2 molecule ascompared to pre-adsorbed O2 molecule. Different from CO2 molecule, CO molecule always played as a donor forα-Fe2O3 (0 0 1) nano-thin film system with and without pre-adsorbedO2. The theoretical results verify that the CO molecule can react with lattice or adsorbed oxygen of α-Fe2O3 (0 0 1) nano-thin film. The electrons transferred to the stoichiometric α-Fe2O3 (0 0 1) nano-thin film from CO molecule/new formed CO2 molecule were more than that of transferred to the O2 pre-adsorption α-Fe2O3 (0 0 1) nano-thin film. For stoichiometric or O2 pre-adsorption α-Fe2O3 (0 0 1) nano-thin film, the CO2 and CO moleculesexhibited opposite behaviors ofcharge transformation. In addition, pre-adsorbed O2 molecules displayed competitive adsorption withCO2 or CO molecule. The pre-adsorbed O2 molecules hinder electron transfer to CO2 molecule fromα-Fe2O3 (0 0 1) nano-thin film or hinder electron transfer toα-Fe2O3 (0 0 1) nano-thin film from CO molecule. Theoretical results demonstrate that the (0 0 1) surface of α-Fe2O3 materials could be prepared as adsorbents or gas sensors for CO2 and CO molecules.Their structures were stable after CO2 molecules were adsorbed or after the reaction of CO molecules withlattice or adsorbed oxygen ofα-Fe2O3 (0 0 1) nano-thin film.

    Time:

    Title: Robust Large-Gap Quantum Spin Hall Insulators in Chemically Decorated Arsenene Films

    Dongchao Wang
    Linyi University, China

    Biography
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    Biography

    Dongchao Wang
    Linyi University, China

    Dongchao Wang gained his Ph.D from School of Physics, Shandong University. He joined the institute of condensed matter physics, school of physics and electric engineering, Linyi University in July 2016. His major is in the area of condensed matter theory, nanostructures and quantum devices. His research project is on theoretical and computational studies of structural and electronic properties of two-dimensional materials.



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    Abstract

    Dongchao Wang
    Linyi University, China

    Based on first-principles calculations, we propose one new category of two-dimensional topological insulators (2D TIs) in chemically functionalized (-CH3, -OH and halogens) arsenene films. The results show that the surface decorated arsenene films are intrinsic 2D TIs, which are verified by calculating the edge states with obvious linear cross inside bulk energy gap. The bulk energy gaps range from 0.184 eV for AsCH3 film to 0.304 eV for AsOH films, which make them suitable to realize quantum spin Hall effect in an experimentally accessible temperature regime. These novel 2D TIs are potential candidate in future electronic devices with ultralow dissipation.

    Time:

    Title: Quantum Phase Transitions in Sn Bilayer Based Interfacial Systems by an External Strain

    Li Chen
    Linyi University, China

    Biography
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    Biography

    Li Chen
    Linyi University, China

    Li Chen gained her Ph.D from School of Physics, Shandong University. She worked in Institute of Condensed Matter Physics, School of Physics and Electric Engineering, Linyi University. Her major is in the area of condensed matter theory, quantum Hall effect, nanostructures and quantum devices. Her research project is on theoretical and computational studies of structural and electronic properties of electronic materials.



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    Abstract

    Li Chen
    Linyi University, China

    Using first-principle calculations, we report for the first time, the changes in electronic structures of a single bilayer Sn stacked on a single bilayer Sb (Bi) and on a single quintuple layer Sb2Te3 induced by both interface polarization and strain. With BL, Bi, and QL Sb2Te3 substrates, the stanene tends to have a low-buckled configuration, whereas with BL Sb substrate, the stanene prefers to form high-buckled configurations. For strained Sn/Sb(Bi) system, we find that the Dirac cone state is not present in the band gap, whereas in strained Sn/Sb2Te3 system, spin-polarized Dirac cone can be introduced into the band gap. We discuss why tensile strain can result in the Dirac cone emerging at the K point based on a tight-binding lattice model. This theoretical study implies the feasibility of realizing quantum phase transitions for Sn thin films on suitable substrates. Our findings provide an effective manner in manipulating electronic structures and topological states in interfacial systems by using interface polarization and strain, which opens a new route for realizing atomically thin spintronic devices.

    Time:

    Title: Enhance Broaden of Quantum dot Emission by Selective Area Intermixing

    Hala Alhashim
    King Abdullah University of Science & Technology (KAUST), Saudi Arabia

    Biography
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    Biography

    Hala Alhashim
    King Abdullah University of Science & Technology (KAUST), Saudi Arabia

    Hala Al-Hashim, is a Ph.D Candidate in Material Science & Engineering since 2011, at King Abdullah University of Science & Technology (KAUST), within the Academic Division of Physical Science & Engineering. Her work is centered around developing and integrating innovative statistical approaches to advance research in Tuning Lasing Wavelength in III/V semiconductor quantum dot/quantum well devices which gives wide range of interested in applications such as biomedical imaging, optical communications. Hala’s methodological research focuses on the field of solid state physics, photonic materials, nanofabrication, and advance engineered materials. She is a specialist in semiconductor material solid state lightening, has a very extensive knowledge in solid state physics, and analyzing & improving scientific projects. Mrs. Al-Hashim works as an effective instructor with 9 years of experience in developing labs. She was capable of generating enthusiasm in others and inspiring them to be innovative in their field. Hala received her Master Degree in physics from the Dammam University.



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    Abstract

    Hala Alhashim
    King Abdullah University of Science & Technology (KAUST), Saudi Arabia

    Semiconductor quantum-dot (QD) lasers are well known of exhibiting superior performance due to the delta-like function of the discrete density-of-states, resulting in low-threshold current densities, and high gain. Arising from the size, composition and strain distribution in and around the QD, multi-state lasing are resulting, and leading to emission broadening. For monolithic integration of photonic integrated circuits, the selective area intermixing technique is preferred. Controlling the Lasing spectra of QD lasers is highly desirable for certain application. The wide spectral bandwidth of the light source determines the coherence length which in turn determines the resolution of imaging optical coherence tomography (OCT) systems, Broad band light source are vital component for wavelength division multiplexing (WDM), and. Various methods have been proposed and utilized to achieve broad spectral bandwidth light emission from QD devices, such as using multilayer stacks of QDs with different emission wavelength for each layer, hybrid quantum well (QW)/quantum dot structures, optimizing the growth conditions to increase the inhomogeneous dot size distribution, or using multi-contact device structures. Quantum dots intermixing is a promising technique, to modify confining potential throw atoms inter diffusion, by increasing the effect of interface fluctuations between the QDs and their surrounding barrier layer materials shows as change in emission spectra. In this work, we will present the systematic post-growth thermal annealing studies using various dielectric capping TiO2, SiO2, SrTiO3, HfO2, Si3N4, ZnO, and Al2O3, to control the degree of intermixing for tuning the energy spacing between ground and exited states during the spontaneous emission process, and with the view of achieving the broadest emission. We determined the best capping and annealing process to achieve the broadest emission from each capping, followed by selecting three specific capping layer to gain the highest broadening. Our experimental results show that annealing at 650oC for 120s are the best conditions to achieve the broadest spontaneous emission spectra. The QD laser structure capped with Al2O3, HfO2 and SiO2 gave emission wavelength and full-width at half-maximum (FWHM) of 1200nm / 182nm, 1210 nm / 153 nm, and 1110nm / 116nm, respectively. By combining these three selectively dielectric capping, a broad emission with 200 nm FWHM can be achieved. Otherwise even if only use Al2O3 as one capping a large emission of 182 nm can be achieved.

    Time:

    Title: Preparation of Polymer Composites with Metal Oxides for Ir Shielding

    Marta Mazurkiewicz Pawlicka
    Warsaw University of Technology, Poland

    Biography
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    Biography

    Marta Mazurkiewicz Pawlicka
    Warsaw University of Technology, Poland

    Dr. Marta Mazurkiewicz-Pawlickais an assistant professor at the Faculty of Chemical and Process Engineering, Warsaw University of Technology since 2016. She obtained her doctorate from the Faculty of Materials Science and Engineering, Warsaw University of Technology for the thesis focusing on preparation of palladium catalysts on carbon nanotubes used in direct formic acid fuel cell. Her work focuses on carbon nanomaterials, their functionalization and applications in low-temperature fuel cells and polymer composites. She is an author of 28 scientific papers published in international peer-reviewed journals.



    Abstract
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    Abstract

    Marta Mazurkiewicz Pawlicka
    Warsaw University of Technology, Poland

    Materials for infrared shielding can be used in many different applications, such as heat shielding in smart windows. For this purpose many different materials have been studied, such as indium tin oxide (ITO), antimony tin oxide (ATO), tungsten oxide (WO3), lanthanum hexaboride (LaB6). In our investigations we have prepared polymer composites (polyvinyl alcohol matrix) with different amounts of inorganic fillers, i.e. zinc oxide (ZnO) and iron oxide (Fe2O3). We have studied the influence of the amount of the filler and the preparation method on the properties of the obtained composites. Preparation of the composites involved using either an ultrasonic homogenizer or a planetary ball mill. The obtained composites were characterized with FT-IR spectroscopy (in attenuated total reflectance – ATR and in transmission mode), thermogravimetric analysis (TGA), and optical microscopy. The heat shielding was examined by a thermal insulation experiment. The results show that both the preparation method and the amount of the filler have great impact on the physicochemical properties of the obtained composite.

    Time:

    Title: Preparation of Fe2o3 / Graphene Composite for IR Shielding

    Artur Malolepszy
    Warsaw University of Technology, Poland

    Biography
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    Biography

    Artur Malolepszy
    Warsaw University of Technology, Poland

    Artur Malolepszy, defended his PhD at Faculty of Materials Science and Engineering Warsaw University of Technology in 2015 the title “Production and characterization of multiwalled carbon nanotubes and metal oxide functional composites for formic acid fuel cells applications”. Since January 2016 he is working at the Faculty of Chemical and Process Engineering Warsaw University of Technology. His research realized in the frame of the Graphene Laboratory established for production of proper functionality graphene flakes. He is also looking for new applications of carbon nanomaterials in the field of biomaterials, alternative energy sources, ie. fuel cells and screens for electromagnetic and infrared radiation. In his work he used research techniques and instruments such as: electron microscopy (STEM), thermogravimetry (TGA), differential scanning calorimetry (DSC), X-ray fluorescence spectrometry (XRF), infrared spectroscopy and elemental analysis.He is the co-author of 26 publications in peer-reviewed international journals, Hirsch index = 9 with 333 citation excluding self-citation. He has participated in more than 15 international conferences, including 6 foreign.



    Abstract
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    Abstract

    Artur Malolepszy
    Warsaw University of Technology, Poland

    Inorganic nanocrystals attract great interest due to their unique physical properties and immense potential for applications. In particular, magnetic nanocrystals offer exciting opportunities for technologies on the interfaces between chemistry, physics, biology, and medicine. The aim ofour research was investigation of the influence of preparation conditions on the magnetic properties of iron oxide/graphene composites. Graphene oxide (GO) were prepared via modified Hummer’s method. Iron oxide nanoparticles deposited on the graphene surface were prepared bysol-gel methodunder different conditions e.g. pH, temperature, time. The obtained composites were characterizedby: i) X-ray diffraction (XRD) – to determine the average size of crystallites and the phase composition, ii) electron microscopy (SEM/STEM) – for imaging the metal oxide distributionon the surface of graphene flakes, iii) thermo-gravimetric analysis (TGA) – for determining the thermal stability and percentage content of graphene and metal oxides. Absorption of IR radiation were measured using FT-IR spectrometer in the range of 400 – 7000 cm-1.

    Time:

    Title: Composition Effect on CZTS Properties Prepared by Solid State Reaction

    Amar Khelfane
    Research Center in Semiconductors Technologies for the Energetics (CRTSE), Algeria

    Biography
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    Biography

    Amar Khelfane
    Research Center in Semiconductors Technologies for the Energetics (CRTSE), Algeria

    Khelfane Amar was born on 18/03/1979 in Bouira, Algeria. He graduated from magister in 2012, a physical option for materials and components at the USTHB University in Algiers. He worked as a physics teacher in high school for two and a half years before joining the CRTSE Research Center in Algiers in December 2014 where he worked as a researcher inBulk Semiconductors Crystal Growth team (CSM) working in photovoltaic materials of 3rd generation Cu2Zn(Ge)SnS4.



    Abstract
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    Abstract

    Amar Khelfane
    Research Center in Semiconductors Technologies for the Energetics (CRTSE), Algeria

    Cu2ZnSnS4 (CZTS) is one of the most promising and emerging quaternary absorber materials for thin film solar cells because of its low-cost, non-toxic constituents, ideal direct band gap and high absorption coefficient. In this work, we studied the effect of zinc excess on the crystallization of Cu2ZnSnS4 compound. For this purpose, we synthesized by solid state reaction three CZTS crystals initially with 0.2, 0.4 and 0.6 wt.% of zinc excesses. The CZTS crystals were analyzed using X-ray fluorescence (XRF) to determine chemical composition, X-ray diffraction (XRD) to examine structural properties and Raman scattering for vibrational properties. The composition ratio of [Cu]/([Zn]+[Sn]) is in the range of 0.81-097 while the [Zn]/[Sn] ratio varies from 0.97 to 1.33. The sample with 0.6 at% zinc excess, thus, can be considered optimal for reaching high efficiencies in CZTS based thin films solar cells. XRD profiles exhibit major peaks at 2θ=28.45°, 47.35° and 56.12° for the three samples. These peaks are attributed respectively to the (112), (220) and (312) kesterite planes (JCPDS N°:04-003-8920). The lattice parameters a and c calculated from XRD analysis were respectively 5.429Ĺ and 10.870Ĺ. However, ZnS and Cu4Sn7S16 secondary phases were found. Furthermore, segregation of Cu2-xS phase occurs, as can be seen in Fig.2. Raman scattering spectrum of the sample with 0.6 wt.% excess zinc depicts a weak band at 471cm-1 corresponding to the Cu2-xS phase. Even so, the kesterite phase was confirmed bythe presence of four strong bands at 247cm-1, 294cm-1, 333cm-1 and 364cm-1.

    Time:

    Title: The Calculated Electron Distribution in the In2O3 Compound Validated by the Electron Spectroscopy AES and EELS

    Hamaida Kheira
    University Center BELHADJ Bouchaib, Algeria

    Biography
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    Biography

    Hamaida Kheira
    University Center BELHADJ Bouchaib, Algeria



    Abstract
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    Abstract

    Hamaida Kheira
    University Center BELHADJ Bouchaib, Algeria

    The electron distribution in the valence band and on the core levels in the CTO (Conductive Transparent Oxide) In2O3 is very important to predict its applications. We adopt the calculation simulation based on the approximations GGA (Generalized Gradient Approximation) and mBJ (modified Becke Johnson) using the programWien2K to obtain the electron distribution. The valence band involves the hybridation of states s and p of chemical species indium and oxygen in the range -6eV to 0eV. The features related to these states s and p are very discriminated from other features located to low energies related to states d of indium in the range -13 eV to -11eV. The calculation results enable us to predict the interband transition. Furthermore, the electron distribution around the cation (indium) and anion (oxygen) allows us to determine the ionic character of the chemical bond in the In2o3 compound. We confirm such results owing to the characterization methods by the electron spectroscopy AES (Auger Electron Spectroscopy) and EELS (Electron Energy Loss spectroscopy). Keywords: GGA and mBJ approximations; oxides CTO; AES and EELS spectroscopy. Summary:

    Time:

    Title: Structural and Electronic Properties of CaFX (X= Cl, Br and I) Compounds in its Matlockite-Type Structure via First- Orinciples Calculations

    Meriem Harmel
    University Center BELHADJ Bouchaib, Algeria

    Biography
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    Biography

    Meriem Harmel
    University Center BELHADJ Bouchaib, Algeria



    Abstract
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    Abstract

    Meriem Harmel
    University Center BELHADJ Bouchaib, Algeria

    We present the results of the ab initio theoretical study of the structural, electronic, optical and thermal properties for CaFX (X= Cl, Br and I) compounds in its matlockite-type structure used the full-potential linearized augmented plane-wave (FP-LAPW) [1] method as implemented in WIEN2K code [1]. We used the generalized gradient approximation (GGA) [1] based on exchange–correlation energy optimization to calculate the total energy. Moreover, the modified Becke-Johnson potential (TB-mBJ) [1] was also applied to improve the electronic band structure calculations. Ground state properties such as the lattice parameters, c/a ratio, bulk modulus, pressure derivative of the bulk modulus and cohesive energy are calculated as well as the optimized internal parameters, by relaxing the atomic position in the force directions. The variations of the calculated inter atomic distances and angles between different atomic bonds are discussed. The electronic band structure, density of states and charge density calculations show that these compounds are ionic insulators. Key words: FP-LAPW method; matlockite-type structure; Structural and electronic properties.

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