Day 2 :
Keynote Forum
Masafumi Yamaguchi
Toyota Technological Institute, Japan
Keynote: Overview of solar cell research and development and approaches to automobile applications
Time : 09:00-09:40
Biography:
Masafumi Yamaguchi is Professor Emeritus at the Toyota Technological Institute (TTI), Nagoya, Japan and Senior Research Scholar of the Research Center for Smart Energy Technology (SET) at the TTI. He is also a Visiting Professor of the Kyushu University and Chairman, Research Committee of the Super High Efficiency Solar Cells, Japan Soceity for Promotion of Science (JSPS)
Abstract:
Development of high-efficiency solar cell modules and new application fields are very important for further development of PV (photovoltaics) and the creation of new clean energy infrastructure based on PV. For this end, further development of science and technology of PV is necessary. This paper overviews PV R&D activities in Japan as the PV R&D former Project Leader of NEDO and JST. Present status of various solar cells efficiencies under NEDO and JST PV R&D projects are presented. 44.4% for concentrator III-V compound 3-junction solar cell, 37.9% for 1-sun III-V compound 3-junction cell, 26.7% for single-crystal Si cell, 22.9% for CIGS cell, and 14.0% for a-Si based 3-junction cell. Efficiency potential of various solar cells is also discussed. Future prospects of PV and our recent approaches towards the creation of “Mobility Society by using Solar Energy” are discussed. Very large-scale installation of PV power systems is needed and thus the development of ultra-high performance, low cost, and highly reliable solar cells are very important. In addition, development of low cost and long lifetime batteries, highly reliable and intelligent system technologies such as smart grids is necessary. We are now challenging III-V/Si tandem solar cells. Because III-V/Si tandem solar cells have great potential for high-efficiency, low-cost and light-weight solar cells. Automobile applications by using solar energy are also very important and very attractive. Recently, we have developed high-efficiency (32%) InGaP/GaAs/InGaAs thin-film 3-junction solar cells module with an area of 32cmx32cm and 33% efficiency InGaP/GaAs/Si mechanically stacked 3-junction solar cell. Those are expected to be one of the seeds for solar electric vehicle applications
Keynote Forum
Mark A Zurbuchen
University of California at Los Angeles, USA
Keynote: Topotactic anion exchange in epitaxial films: Synthesis advantages and characterization challenges
Time : 09:40-10:20
Biography:
Mark A Zurbuchen is an Adjunct Professor in EE and MS&E in the prestigious DRL (Device Research Lab) under the WIN and CEGN Programs, and additionally leads the "2D Materials" sub-group, and is affiliated with the "Quantum Physics & Devices" sub-group as well. He is a thin film scientist. Electron and X-ray beam methods (XRD, TEM, synchrotron). Expertise in epitaxial films and heteroepitaxial integration. Materials design, thin film deposition, microstructural characterization, crystallography, and electrical behavior. 2D materials, oxide electronics, ferroelectrics, dielectrics, multiferroics, superconductors, nano-scale thermal behavior, and biomaterials
Abstract:
Statement of the Problem: Despite direct epitaxial deposition/facet-growth of innumerable materials in lab experiments, new lattice-matched buffer (interdiffusion-blocking) layers are desperately needed by the microelectronics industries. There is a need for "substrate agnostic" buffer layer(s) to template epitaxial growth on Si, GaN, Ni, and others. Epitaxial templates, particularly ultra-thin oxide layers, have been demonstrated to be excellent epitaxial buffer layers, but the fabrication of epitaxial samples of many materials is frustrated by chemical or lattice mismatch. This talk focuses on a new, better approach to dealing with heterogeneous interfaces. A promising new approach–topotactic anion exchange (TAE) epitaxy. The approach is unique, with two steps–1st epitaxial deposition of a precursor layer; and 2nd a special gas anneal to exchange the anions in the solid for others; to ultimately yield a highly perfect epitaxial film of the product phase. Opportunities abound, as there are only two criteria to meet: (a) The initial film is formulated to match the surface-symmetry type and lattice parameter of the substrate; (b) a thermal, atmosphere-controlled step initiates the topotactic reaction. Ideally, compositions for TAE layers are chosen with end members commensurate–as the reaction front passes through the solid. Cations are sessile with anions are relatively mobile. Anions are exchanged diffusively; but because the resultant material is a different phase altogether, conversion can dramatically alter the magneto-opto-electrical behaviors of the layers. Characterization requires finesse at the atomic level. The typical anions all have roughly the same atomic mass, making discernment between the two phases complicated. The results of ex situ and in situ anion exchange experiments towards an epi buffer for Si and GaN will be presented. Further discussion of analyses thus far will be presented
Keynote Forum
Dirk M Zajonc
La Jolla Institute for Allergy and Immunology, USA
Keynote: Design of lipid and peptide antigens for immune cells using X-ray crystallography
Time : 10:40-11:20
Biography:
Dirk M Zajonc is an Associate Professor at La Jolla Institute for Allergy and Immunology. He is experienced Associate Professor in Structural Immunology with an interest in characterizing immune responses toward microbial pathogens. He is skilled in Protein Chemistry, including antibodies and recombinant protein production and characterization, molecular biology, biophysics, and structural biology. He has strong interest in the interplay between microbial infection, as well as cancer with the immune system. He has published articles in various journals.
Abstract:
T cells are potent effector cells of the immune system that control infection and tumorigenesis but can also lead to autoimmunity when they respond too strongly to self-antigen. While the majority of T cells are specific to peptides presented by the Major Histocompatibility Complex I and II (MHC I and II) molecules, a small population of T cells respond to lipids when presented by the non-classical MHC I homolog CD1d. Extensive functional and structural data has been accumulated that allows for the design of altered glycolipid ligands that modulate immune responses toward infection and tumorigenesis. We further obtained novel insights into the unconventional presentation of peptides that allows us to design altered peptide ligands with novel functions. The structural basis and functional consequences of both lipid and peptide antigen recognition by the immune system will be discussed
Best Poster Award Distribution 12:30-12:40
Lunch Break 12:40-13:40 @ Foyer
- Speakers Session - Materials Science & Engineering| Nanotechnology in Materials Science| Batteries and Energy Materials| Advanced Crystallography| Crystallography in Biology| Crystallography in Materials Science
Location: Concord A/B
Chair
Dirk M Zajonc
La Jolla Institute for Allergy and Immunology, USA
Session Introduction
Ali Al-Mafarage
Wright State University, USA
Title: The properties of multifunctional two dimension nanocomposite produce by Langmuir-Blodgett technique base on using single-walled carbon nanotubes
Time : 13:40-14:05
Biography:
Ali Al-Mafarage has an MSc in Civil Engineering (structure) from AL-Nahrain University in 2005 from Iraq. Also, earn MSc in Material Science in Engineering (nanotechnology) 2018 from Wright State University in the USA. His advisor is Professor Maher Amer at Wright State University. This work is a fellowship received from Higher Education Council of Iraq to him to pursue his PhD degree at Wright State University in Material Science and Nanotechnology. He has submitted a paper, but it still under the reviewer section. He has represented in (AIAA) conference held in Dayton Ohio, 2018 as Speaker
Abstract:
A real single layer (monolayer) films of unmodified zigzag (18.0) single-walled carbon nanotubes by using Langmuir Blodgett (LB) technique have been processed. Measurements of their properties in bundles which include stress-strain behavior (mechanical properties) and electrical properties that related to the structural of tubes are applied. Both theoretical and experimental methods are applied together to confirm the results. The produced films were highly oriented as determined by polarized Raman spectroscopy and shown by scanning tunneling microscopy (STM), Atomic force microscopy (AFM). None of the chemical or surfactant treatments are applied in this study. The produced films are tested separately, then they use with the matrix which is Poly (methyl methacrylate) (PMMA) to form nanocomposite by using in situ polymerization technique. The behavior of the produced composite is discussed also, and the main factors that can affect the properties will highlight.
Tatsuya Shishidou
University of Wisconsin-Milwaukee, USA
Title: Magnetic fluctuations in single layer FeSe
Time : 14:05-14:30
Biography:
Tatsuya Shishidou, a native of Japan, received his Master degree in Physics (1996) from Osaka University and his PhD in Physics (1999) from Hiroshima University. He was a Research Associate at Northwestern University, Illinois with Prof AJ Freeman from 2000 to 2003. He was an Assistant Professor at Hiroshima University from 2003 to 2016. In 2016, he joined the University of Wisconsin-Milwaukee. He is currently an Associate Scientist working with Prof M Weinert. He is author and co-author of over 50 scientific publications
Abstract:
Single layer FeSe films grown on SrTiO3(001) (STO) have been an extensive focus because of their reported high superconducting critical temperature of 40-100K. Despite a lot of work done already, the nature of the paramagnetic state and the origin of superconductivity remains puzzling. Here we use density functional theory (DFT) spin-spiral calculations to address the paramagnetic and superconducting nature of the monolayer FeSe/STO. The spin-spiral energy dispersion E(q) is found to be extremely flat around the q=0 checkerboard (CB)-antiferromagnetic (AFM) configuration. Those q states in the plateau share similar electronic band structure. Mapping E(q) onto (extended) Heisenberg models places this S=1 spin system in a region of parameter space where CB-AFM quantum fluctuations lead to a magnetically disordered paramagnetic state. Modeling the paramagnetic state as an incoherent superposition of spin-spiral states arising from thermal/quantum fluctuations, the electronic spectrum around the Fermi level closely resembles that observed by angle-resolved photoemission spectroscopy. A superconducting theory is developed within a symmetry-based k·p like method with the electrons coupled to CB-AFM type spin fluctuations; this model provides a robust prediction of nodeless d-wave superconductivity, and naturally explains the experimental finding of fully-gapped yet anisotropic order parameter
Ming Yue Lee
Arizona State University, USA
Title: Serial crystallography of a G-protein coupled receptor using polychromatic synchrotron radiation source
Time : 14:30-14:55
Biography:
Ming Yue Lee is an expert in macromolecular crystallography with focus on technology development and implementation in novel membrane protein crystallization and diffraction methods. He has made contributions in the field of GPCR structural biology in the forms of active participation and validation of serial femto-second crystallography using XFEL sources, as well as being involved in validation of delivery mechanisms for various cutting-edge diffraction experiments both at XFEL and synchrotron radiation sources. He is actively leading and driving the effort to develop and implement technology that can enhance and optimize serial crystallography at polychromatic synchrotron radiation sources. His current focus is building up a system approach to study membrane protein structure-function relationships between different components of the cellular membrane environment with an emphasis on spatial and temporal resolution of proteomic interactions
Abstract:
Since the first successful serial crystallography (SX) experiment at synchrotron radiation sources, the popularity of this approach has continued to grow, showing that 3rd generation synchrotrons can be viable alternatives to scarce X-ray free electron laser sources. Synchrotron radiation flux may be increased about 100 times by a moderate increase in bandwidth (“pink beam” conditions) at some cost in data analysis complexity. Here, we report the first high-viscosity injector-based pink beam SX experiments. The structures of A2A adenosine receptor (A2AAR) and proteinase K (PK) were determined to 4.2Å and 1.8Å resolution using 24 and 4 consecutive 100 ps X-ray pulse exposures, respectively. Strong PK data were processed using existing Laue approaches, while weaker A2AAR required an alternative data processing strategy. This demonstration of the feasibility presents new opportunities for the time-resolved experiments with micro-crystals to study structural changes in real-time at pink beam synchrotron beamlines worldwide
Davoud Dastan
Georgia Institute of Technology, USA
Title: Hybrid photoresists based on organic metals clusters and ligands
Time : 14:55-15:20
Biography:
Davoud Dastan is a Research Associate at Georgia Institute of Technology. Prior to his appointment at George Tech., he was a Post-doc fellow at Cornell University, Ithaca, New York, USA. He is working on nanomaterials for energy applications. He has published several papers and has been serving as an Editorial Board Member of repute
Abstract:
Hybrid photoresists were prepared based on organic metal clusters decorated with organic ligands on silicon substrates using sol-gel and spin coating techniques. The resist was spun on a silicon substrate at 3000rpm for 30 seconds and then dried at ambient condition. The size of nanoparticles and hybrid materials was measured using Zetasizer. These films were annealed at different temperatures for 30 seconds so as to remove the possible solvent on the surface and develop hybrid photoresists. The resists were exposed to extreme ultraviolet (EUV) irradiation and deep ultraviolet irradiation (DUV). The structural, thermal, molecular, elemental/compositional, morphological and physical properties of metal nanoclusters and hybrid photoresists were investigated using X-ray diffraction (XRD), Raman spectroscopy, nuclear magnetic resonance (NMR), electrospray ionization-mass spectrometry (ESI-MS), Fourier transform infrared (FTIR) spectroscopy, energy-dispersive X-ray diffraction spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), selected area electron diffraction (SAED), and field emission scanning electron microscopy. The parameters such as phase development, thermal stabilities, nature of chemical reactions, elemental/compositional analysis before and after ozone treatment, ligand cleavage under EUV exposure, surface morphology, particles size, surface area, cluster’s ligands contribution to the solubility difference between exposed and unexposed areas triggered under EUV radiation, molecular weight and distribution of the different molecular species present in photoresists, mechanism of patterning EUV hybrid photoresists, lithography performances of the hybrid photoresists were evaluated using the above characterization techniques.
Vinoth Kumar Ponnusamy
Kaohsiung Medical University, Taiwan
Title: Facile one-step synthesis of porous graphitic carbon nitride nanosheets/oxidized multi-wall carbon nanotubes composite for simultaneous anodic stripping voltammetric detection of heavy metals in food samples
Time : 15:40-16:05
Biography:
Vinoth Kumar Ponnusamy has completed his PhD at the age of 26 years from NCHU, Taiwan and Postdoctoral studies from NCHU School of Chemistry. Currently, he is an Assistant Professor in Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Taiwan. He has published more than 25 papers in reputed journals and has been serving as an Editorial Board and peer-review member of repute
Abstract:
We demonstrate a facile one-step synthesis of three-dimensional (3D) porous graphitic carbon nitride nanosheets (P-g-C3N4-NSs)/oxidized multi-wall carbon nanotubes (O-MWCNTs) composite by simultaneous chemical oxidation of bulk g-C3N4-NSs and bulk MWCNTs. This one-step chemical oxidation method results in the simultaneous formation of acid functional groups on the basal surfaces of both g-C3N4 and MWCNTs, and also the formation of the porous structure of P-g-C3N4/oxidized MWCNTs composite at the same time. The acid functionalization and surface morphology of the prepared P-g-C3N4-NSs/O-MWCNTs composite were examined using attenuated total reflectance infrared spectroscopy (ATR-IR), X-ray diffraction methods (XRD), and high-resolution transmittance electron microscopy (HR-TEM). The electrochemical properties of the P-g-C3N4/O-MWCNTs composite modified screen-printed electrode (SPE) was studied using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry techniques (DPV). P-g-C3N4/O-MWCNTs/SPE exhibits excellent sensitivity and selectivity towards the simultaneous detection of heavy metals (Cd, Hg, Pb & Zn) in food samples with the detection limits (S/N=3) ranging between 8 to 60ngL-1 under stripping analysis. The practical feasibility of the developed sensor was examined for simultaneous detection of heavy metals in various food samples, and the obtained results exhibit good accuracy and good reproducibility. These results imply that the developed composite might be an alternative sensor material for practical applications in electrochemical detection of heavy metals in foods.
Maihemuti Maimaitituersun
Istanbul Technical University, Turkey
Title: Self-healing PMMA Nanocomposites
Time : 16:05-16:30
Biography:
Maihemuti Maimaitituersun completed his Master study in 2017 from department of Physics Engineering, Istanbul Technical University. Now he is continuing his Ph.D. Study in department of Physics Engineering, Istanbul Technical University
Abstract:
Poly (methyl methacrylate) (PMMA) is a wiedly used thermoplastic polymer material because of its advantages including light weight, easy processability, high impact resistance, chemical stability, high resistance to weathering and excellent heat resistance etc. PMMA is an ideal candidate for aerospace, automotive, marine applications. However, long-term durability and reliability of polymeric materials are still problematic when they serve for structural application. Hence, in this study we added several nanomaterials to improve the weak properties of PMMA. PMMA was synthesized by Atom Transfer Radical Polymerization (ATRP) technique; nanofillers are dispersed at 5 different concentration levels such as 0.1, 0.25, 0.5, 1.0 and 2.0 wt. % via in situ polymerization method. The changes in the properties of PMMA nanocomposites examined by SEM, TGA/DSC tensile, impact and hardness tests. PMMA nanocomposite with the low nanofiller loading ratio showed noticeable enhancements in their mechanical and thermal aspects. In this study, we also synthesised self-healing PMMA nanocomposite. Encapsulate GMA was served as self-healing agent. Emulsion polymerization was applied to encapsulate GMA with poly (melamine-formaldehyde) (PMF) as the wall substance. GMA was added to PMMA nanocomposite solutions via melt compounding method. Self-healing performance of the PMMA nanocomposites was evaluated via impact test
Wassila Issaadi
University of Bejaia, Algeria
Title: The optimized PV-UPFC hybrid network for power quality improvement load by an improved distribution algorithm: A best performance from combination of the proposed PV systems and unified power quality controllers
Time : 16:30-16:55
Biography:
Wassila ISSAADI is a Doctor of Sciences in Department of Automatics, Electronics, and Electrical Engineering, University of Bejaia, Algeria and received her Doctorat (PhD) degree in September 2016 at the age of 25 years. She obtained Magister degree in 2013, and the diploma of state engineer in 2011. Her current research interests include Robotics, Automatics, adaptives and robust control, Photovoltaics and its Controls, Artificial Neural Network and Fuzzy Logic Theory. She is author of many research papers published at both International and National journals (Elsevier and IEEE), Conference proceedings.
Abstract:
Combining active filters and renewable sources, in particular photovoltaic systems, allows us to take advantage of power enhancers in delivering high quality pollution free power to consumers. Due to the numerous applications of the solar system, the present study has taken into consideration a different type of its applications, so that by combining UPQC and PV systems in areas nearby loads, which have high potential of radiation, one can improve the quality of electrical energy delivered to consumers. Therefore, the present study aimed to design a proposed system (UPQC-PV) considering control of the active filter, the photovoltaic system’s maximum power point tracking, and DC-link voltage control strategy. The results obtained from the present study indicated that compensating the parallel active filter leads to remove the unwanted current at the end of the network and also compensating the series active filter leads to compensated voltage drop in the network
- Young Research Forum
Location: Concord A/B
Session Introduction
Andrea Skolakova
University of Chemistry and Technology, Prague
Title: High entropy CoCrNiFe-X alloys prepared by mechanical alloying
Time : 17:05-17:20
Biography:
Andrea Skolakova has studied as a PhD student at the Department of Metals and Corrosion Engineering of University of Chemistry and Technology, Prague (UCT Prague). She was awarded by prestigious Votocek’s stipend associated with publication activity that is granted to the most talented students. She is an author and co-author more than 25 papers indexed by Web of Science and Scopus
Abstract:
High entropy alloys (HEAs) have been the most studied group of materials in recent years. HEAs are usually composed of five or more principal elements whose concentration varies from 5–35%. These alloys exhibit exceptional mechanical properties, including high strength and plasticity and good corrosion and wear resistance. They are typically characterized by four effects comprising the high entropy effect, the lattice distortion effect, the sluggish effect, and the cocktail effect. Up to this time, HEAs have been produced mainly by traditional melt-metallurgy processes especially by arc or induction melting, followed by the final processing techniques to achieve desired microstructure, mechanical properties, and shape. Current researches have been focused on powder metallurgy routes combining mechanical alloying and appropriate compaction technique that may mitigate the undesirable microstructural coarsening. In this work, equiatomic CoCrNiFe-X (X-Mn, Nb) alloy was prepared by a combination of mechanical alloying and spark plasma sintering. Further, the same alloy was also prepared by conventional induction melting for comparison. The effect of sintering temperature and of the preparation on microstructure and mechanical properties was studied
Maryam Kiani
Sichuan University, China
Title: Facile synthesis of Ni-doped ZnFe2O4 nanoparticles supported on carbon black as an efficient electrocatalyst for oxygen reduction reaction in fuel cells
Time : 17:20-17:35
Biography:
Maryam Kiani obtained her MPhil degree from National University of Science and Technology (NUST) Islamabad, Pakistan. She is currently doing PhD at College of Material Science and Engineering Sichuan University China and doing research on Energy Materials and Devices under the supervision of Prof Ruilin Wang. Her research is focused on the non-noble metal catalyst for fuel cells
Abstract:
Novel nanocomposite system Ni-doped ZnFe2O4 with carbon black was efficiently synthesized for oxygen reduction reaction (ORR) by a simple, scalable hydrothermal synthesis route. Face Centered Cubic (FCC) phase of the Ni-doped ZnFe2O4 nanocomposite was confirmed by X-Ray Powder Diffraction (XRD) analysis. The average particle size is calculated at 20nm. The as-synthesized Ni-doped ZnFe2O4/C nanocomposite displays enhanced ORR catalytic performance than pure ZnFe2O4, ZnFe2O4/C, and Ni-doped ZnFe2O4/C, which mostly favors a desired direct 4e- reaction pathway in the ORR. The improved electrocatalytic performance of the Ni-doped ZnFe2O4/C nanocomposite is ascribed to the doping of Ni atoms in zinc ferrite with carbon black, which affects the lattice parameter of crystal structure, particle size, and specific surface area and the strong coupling of with carbon black.
Muhammad Musaddique Ali Rafique
RMIT University, Australia
Title: Fiber reinforced magneto polymer matrix composites
Time : 17:35-17:50
Biography:
Muhammad Musaddique Ali Rafique has completed his PhD in 2018 from RMIT University, Melbourne, Australia. His areas of expertise are; metallurgy, materials science, additive manufacturing and modeling, and simulation. He is a member of MRS, TMS, and other reputable societies. He has authored and coauthored more than 14 papers in reputed journals and has been serving as Reviewer and Editorial Board Member of reputed periodicals as well
Abstract:
Magneto polymer matrix composites (MPMC) are a new class of magnetic polymer materials which have evolved as potential materials for tomorrow’s aircraft structures. They encompass magnetic, particulate strengthening (dispersion strengthening) as well as fiber reinforcement/strengthening characteristics which are sought out to be utilized toward making efficient future aerospace composite materials. Various types of ferrites including barium, cobalt, iron, and strontium were explored for being used in making new composites. In the present talk, I will present a general overview of the synthesis, structure, properties, thermodynamics, surface chemistry, and phase transformations of individual ferrites and clusters of ferrites as fillers. A discussion about control of properties with the surface functionalization, modification, emulsification/compounding/blending, heat treatment (phase transformation and separation), and control of processing conditions (temperature, pressure, and geometry of mold) will be presented. These smart materials have a wide range of potential applications in medicine, drug delivery, bioimaging, biomarking, tissue engineering, electromagnetic interference (EMI) and electromagnetic force (EMF) shielding, and as competent materials for aerospace structural applications