Day 2 :
Keynote Forum
Ramesh K Agarwal
Washington University in St. Louis, USA
Keynote: Recent progress in acoustic metamaterials membranes for low frequency sound attenuation
Time : 09:00-09:25
Biography:
Professor Ramesh K. Agarwal is the William Palm Professor of Engineering at Washington University in St. Louis. From 1994 to 2001, he was the Sam Bloomfield Distinguished Professor and Executive Director of the National Institute for Aviation Research at Wichita State University in Kansas. From 1978 to 1994, he worked in various scientific and managerial positions at McDonnell Douglas Research Laboratories in St. Louis. He became the Program Director and McDonnell Douglas Fellow in 1990. Dr. Agarwal received Ph.D in Aeronautical Sciences from Stanford University in 1975, M.S. in Aeronautical Engineering from the University of Minnesota in 1969 and B.S. in Mechanical Engineering from Indian Institute of Technology, Kharagpur, India in 1968. He is the author and coauthor of over 500 publications and serves on the editorial board of 20+ journals. He has given many plenary, keynote and invited lectures at various national and international conferences worldwide. He is a Fellow of AAAS, ASME, AIAA, IEEE, SAE and SME.
Abstract:
Low frequency noise has long been regarded as a form of noise pollution due to its high penetrating power. The reduction of low frequency noise from aircraft and automobile engines remains a challenge since the conventional acoustic liners are not able to absorb the low frequency noise radiation. Membrane-type acoustic metamaterials (MAMs) have demonstrated unusual capacity in controlling low-frequency sound transmission and reflection. The MAM is composed of a pre-stretched elastic membrane with attached rigid masses. In this keynote paper, the problems associated with low frequency noise will be discussed. The recent analytical/computational/experimental research on acoustic metamaterial membranes in controlling and attenuating the low frequency noise will be presented.
Keynote Forum
Masahiro Goto
National Institute for Materials Science, Japan
Keynote: Nanostructured functional organic materials synthesized by a laser irradiation method for applications of molecular devices and high-sensitive sensors
Time : 09:25-09:50
Biography:
Masahiro Goto has completed his PhD at the age of 28 years from Nagoya University, Japan and postdoctoral studies from Institute for Molecular Science, National Institute of Advanced Industrial Science and Technology and Japan Atomic Energy Research Institute. He is the distinguished chief researcher of Center of Green Research on Energy and Environmental Materials in NIMS. He has published more than 92 papers in reputed journals.
Abstract:
Organic materials have caught much attention for their potential application in gas sensors, lasers, and organic field-effect transistors. For realizing such devices using organic molecules, it is necessary to generate nanostructured organic materials and to manipulate them onto the appropriate position of electric circuits.
rnWe have succeeded in developing a novel fabrication technique to synthesize nanostructured functional organic materials such as functional polymer nanowires and organic molecular nanoaggregates by a pulsed laser irradiation method. Polymer nanowires were generated by sub-nanosecond pulsed laser irradiation, and time-resolved shadowgraphy images of the growth of the polymer nanowires with uniform diameter at atmospheric pressure were recorded. Nanoparticles of FeO doped polymer nanowires were also successfully synthesized using this method. A plausible mechanism of polymer nanowire synthesis was proposed. Furthermore, a molecular nanojet in water, generated by the pulsed laser irradiation, has been successfully observed by the time-resolved observation method. The molecular nanojet was ejected through the center of a cavitation bubble, which was also generated by the laser irradiation in water. This observation shows us the generation process of the molecular nanojet. These techniques are expected to be utilized in a wide range of applications such as fabrication of molecular devices and ultrahigh-sensitivity sensors in the future.
- Track 2: Nanotechnology in Materials Science
Track 3: Energy Materials
Track 9: Emerging Areas of Materials Science and Nanotechnology
Session I
Location: Chattahooche-A
Chair
Rajendra Bordia
Clemson University, USA
Co-Chair
Masumi Saka
Tohoku University, Japan
Session Introduction
Rajendra Bordia
Clemson University, USA
Title: Analysis and simulation guided processing of hierarchical porous and multi-layered ceramics for energy applications
Time : 09:50-10:10
Biography:
Bordia is a Professor and Chair of the Materials Science and Engineering Department at Clemson University in Clemson, SC, USA He received his Ph.D. (1986) from Cornell University, Ithaca, NY, USA. His research is at the intersection of materials and mechanics and is focused on fundamental and applied studies in the processing and properties of complex material systems for energy, environmental and medical applications. He has authored or co-authored over 125 peer-reviewed technical publications, over 120 technical reports and has presented over 250 invited lectures and seminars. His many awards include election as the Fellow of the American Ceramic Society.
Abstract:
Our current research is focused on developing processing strategies to control the microstructure of ceramics at different length scales. Although the projects are diverse, they all share common features including integration of mechanics in processing and coupled theory, simulations and experimental investigations. In this presentation, two examples will be highlighted. The first project is focused on microstructural control in hierarchical and/or anisotropic porous ceramics. Porous ceramics are used in a broad range of technologies including electrochemical applications like electrodes for SOFCs and batteries. For these applications, the properties of interest are mechanical, thermal, electrical and ionic conductivity, gas diffusion and chemical reactivity. Results will be presented on the processing approaches to make designed microstructures, the quantification of the 3D microstructure and meso-scale simulations of the mechanical and transport properties. The second project is focused on constrained sintering of multilayered ceramics. Due to the differential densification rates of the layers stresses are generated during sintering, which biases the microstructural evolution and have the potential to cause serious defects like cracks. Experimental, analytical and numerical results will be presented on the crack growth in constrained sintering systems including factors that control this and strategies to mitigate the problem. The research is supported by NSF and the Saint-Gobain Company.
Masumi Saka
Tohoku University, Japan
Title: Effect of passivation on suppression or utilization of atomic migration phenomena in metallic thin-film materials
Time : 10:10-10:30
Biography:
Masumi Saka received his Bachelor of Engineering degree in 1977 and his Doctor of Engineering degree in Mechanical Engineering in 1982, both from Tohoku University, Sendai, Japan. He became a Professor at Tohoku University in 1993. His research interests lie in the evaluation of material systems and the fabrication of metallic micro- and nano-materials. He is Editor of a book entitled “Metallic Micro and Nano Materials”.
Abstract:
Characteristic phenomena of atomic migration in metallic thin-film materials affected by passivation are discussed. Two types of migration are treated. One is electromigration (EM) which is atomic diffusion owing to electron flow in high density, and another is stress migration (SM) where atoms are moved by gradient of hydrostatic stress. First as the basis, accumulation and depletion of atoms caused by EM at the interface of dissimilar metals in a straight thin-film line without passivation are reviewed. Then atomic density distribution formed by EM in a straight line with passivation is explained, and appearance of threshold current density for EM damages of hillocks and voids caused by the distribution is shown. The above discussion is also extended to a corner part composed of dissimilar metals in comparison of both cases without or with passivation. In addition to the above subject concerning EM damages, utilization of EM for fabricating micro wires or hillocks is explained. In the fabrication of micro materials, a hole is introduced in the passivation and atoms moved by EM are discharged through the hole to form a micro material. Furthermore, regarding fabrication of micro and nano materials, SM with passivation which is artificial or oxide film is finally discussed. In summary, it is stated that passivation is a key factor for controlling migration phenomena.
Networking & Refreshments Break: 10:30-10:45 @ Foyer
Zong-yi Ma
Chinese Academy of Sciences, China
Title: Fabrication of aluminum matrix composites with nano-sized reinforcements via friction stir processing
Time : 10:45-11:05
Biography:
Zong-yi Ma (Z.Y. Ma) has completed his PhD from City University of Hong Kong and postdoctoral studies from Missouri University of Science and Technology. He is a professor and the group leader in Metal Institute of Research, Chinese Academy of Sciences. He has published 285 peer-reviewed journal papers, with a total of over 7000 citations. He has written several highly-cited review papers, including "Friction stir welding and processing" in Materials Science and Engineering – Reports (2005, 50: 1-78). He has been serving as editorial board members of several international journals such as Materials Science and Engineering A.
Abstract:
Metal matrix composites with nano-sized reinforcements exhibit better mechanical properties than those with micro-sized particles. However, it is a serious challenge to fabricate the nanocomposites because of the difficult in incorporating the nanoparticles into the metal matrixes. In this study, ex situ carbon nanotubes (CNTs) reinforced 2009Al (CNT/2009Al) and in situ Al2O3 and Al3Ti particles reinforced pure Al(Al2O3+Al3Ti)/Al) composites were fabricated by means of friction stir processing (FSP), a development based on friction stir welding. It was indicated that FSP could break up the CNT clusters and achieve uniform individual distribution of CNTs and induce in situ reaction between TiO2 and Al, forming Al2O3 and Al3Ti nanoparticles. The mechanisms responsible for the dispersion and damage of CNTs and the accelerated reaction between Ti and Al were analyzed in detail. It was indicated that although CNTs were cut short during FSP, the layer structure of CNTs was well retained. The formation mechanisms of Al2O3 and Al3Ti during FSP were determined to be a deformation-assisted interfacial reaction and deformation-assisted solution-precipitation, respectively. The CNT/2009Al and (Al2O3+Al3Ti)/Al composites exhibited a good combination of strength and ductility. This investigation provides a new route to fabricate high-property nanocomposites.
Biography:
Prof. S. Ananda MSc, Ph.D, has more than 30 years of teaching and research experience. Presently, he is working as a Professor in Department of Chemistry, University of Mysore, Mysore-570006, Karnataka, India. He has published about 140 research articles in reputed international journals in the area of Chemical Kinetics, Bio-physical Chemistry and Nano Chemistry. At present, he is working on the synthesis of nano materials by Solvothermal, hydrothermal, Electrochemical and biological, Sol-gel method. These materials are applicable in the field of Photocataysis, Electrical, Optical and Biological studies. His group is actively involved in the synthesis of nanocomposites of doped Zinc oxide, doped Zinc sulphide and polymers nano composites. He has reviewed many international research papers. He worked as a Research Associate in Tokyo Institute of Technology, Japan. He has visited several countries like China, France, Japan and Singapore for paper presentation in conferences. He is principle Investigator and Co-investigator for many projects sponsored by UGC, DST-PURSE, UPE, CPEPA and IOE. He has guided 15 candidates for Ph.D degree and 04 candidates towards M.Phil degree. In the past, he worked as an Academic council member for University of Mysore, Mysore. He is Academic Council member, Chairman and member of Board of Education (BOE), Board of Studies (BOS) for University of Mysore and Governing Council Member for many colleges.
Abstract:
Different doped metal oxides and metal sulphides like Ru:ZnS, Nb2O5/ZnO, Se:ZnS, Co:ZnO, Mo:ZnO, In2O3/SnO/ZnO are synthesized by electrochemical, hydrothermal and Cr2O3 by biological method which offers precise particle size, crystallinity and reduced band gap. All the synthesized Nanomaterials were characterized by XRD, SEM-EDS, UV-Vis, EDAX, IR, DLS and impedance spectroscopy. The photocatalytic activity for these nanocatalysts was evaluated by the degradation of textile dyes and textile industry effluents in aqueous solutions under UV and sunlight. Optimal catalyst loading, dye concentration, effect of temperature, pH and degradation by re-used samples were studied. The synthesized materials showed enhanced electrical, photo-voltaic and biological effect. A few synthesized nanocatalysts were used in the synthesis of organic compounds. The kinetics of photodegradation was studied with respect to measurement of COD. Anti-bacterial study was carried out by zone inhibition and fluorometric method. The polymer composites (PEO:Se/ZnS, PVA:Cr2O3, PVA:Mo/ZnO, PVA:Co/ZnO and PEO:Cd/ZnO etc.,) were prepared by casting method and its electrical, optical and viscosity properties were studied. The synthesized materials play an important role in waste treatment, photo-voltaic and biological applications.
Biography:
Prof.Dr.S.Selladurai has completed his PhD at the age of 29 years from Anna University and post doctoral studies from marie Curie University, France. He is the Additional Registrar of premier Anna University. He has published more than 85 papers in reputed journals and has been serving as an guest editor in Ionics.
Abstract:
In order to overcome current energy deficit, alternative efficient energy production, storage and transportation is required. Batteries and capacitors are widely used to store electrical energy. Introduction of electrochemical capacitor (EC) or supercapacitors has revolutionized energy storage devices. EC’s are superior to batteries in terms of power density and conventional capacitors in terms of energy density. Owing to their fast charge-discharge capabilities, long cycle life, flexibility, safety, etc. they attract wide researchers. Specific capacitance of the capacitor can be substantially increased by using suitable nanomaterials as electrode material. Materials like metal oxides and conducting polymers are used as electrodes in EC’s that store electrical energy by faradaic redox process. On the other hand carbon based materials store electrical energy by forming double layer at the electrode-electrolyte interface. Generally, pseudocapacitance originating from redox process is much higher compared to electric double layer capacitance.
Transition metal oxides exhibit excellent capacitive performance. Especially, RuO2 and IrO2 shows ideal performance but their application is hindered by toxicity and cost effectiveness. Spinel oxides of cobalt like Co3O4, NiCo2O4, MnCo2O4, etc. are class of materials that possess high theoretical capacitance. Nickel cobaltites were prepared by combustion technique. Phase and structural details were obtained from X-ray diffraction studies. Functional groups attached to the compound were analyzed using FTIR spectroscopy. XPS technique was utilized to determine the oxidation state of constituent elements. Surface morphology of the prepared samples was examined using FESEM imaging technique. Capacitive property of the material was investigated by employing cyclic voltammetry (CV), chronopotentiometry (CP) and electrochemical impedance spectroscopy (EIS) studies. Pseudocapacitive nature of the samples was revealed from the redox peaks observed in the CV curve. Large area under the CV curve depicts the increase in specific capacitance. CP curves also illustrate the pseudocapacitive behaviour of the samples. Impedance study indicates the low charge transfer resistance in the prepared material. Linear portion of the spectrum in the low frequency region demonstrates the low diffusion resistance offered by the electrode material owing to its porous morphology.
Avin Pillay
The Petroleum Institute, UAE
Title: Micro-beam laser ablation/mass spectrometry for materials depth-profiling and elemental surface distribution studies – polymers, waxes, asphaltenes, steels
Time : 11:45-12:05
Biography:
Dr. Pillay's academic career spans more than 30 years. He is skilled in a wide range of instrumental techniques including Neutron Activation, XRF, PIXE, Gamma-ray Spectroscopy, ICP-MS, Atomic Absorption and UV-Vis Spectrophotometry. He is experienced in the area of analytical and environmental chemistry, and has supervised postgraduate students. He has lectured widely in these areas and in general chemistry, and is keen on promoting cross-disciplinary teaching and research. He has more than 130 peer-reviewed journal articles, and several conference presentations. He was Guest Editor and member of the Editorial Board of the International Journal of Environmental Studies between 2005 and 2009. He is presently member of the Editorial Boards of the Open Hydrology Journal and the Journal of Research and Environment. He has contributed to the proposal of the MSc program in the Chemistry Department at the PI.
Abstract:
Our group has developed a sensitive, semi-quantitative technique for evaluating the distribution of bulk metals in certain matrices (such as polymers, steels), and precisely locating points on the surface of materials for studying spatial distribution. This paper is an overview of the capabilities of laser ablation, which has evolved into an excellent tool for scanning the surface of rigid materials to determine surface homogeneity. It is equally useful for ‘drilling’ beneath the surface of a solid matrix to assess the composition of the substrate. The technique has been known to be suitable for semi-quantitative analysis of dense, compact samples, but recently we revealed that soft samples can also be studied by pre-treating them with liquid nitrogen. Samples subjected to this treatment (such as asphaltenes, waxes) tend to thaw, so analysis must be quick and accurate, within the ‘thaw’ time. The laser itself is attached to a high performance ICP-MS system. A 213-nm micro-beam is deployed to perform iterative surface scans at randomly selected points to determine compositional consistency. The technique is also capable of ablating depths up to 50 µm at selected intervals (usually 10 µm), and measuring characteristic intensities of elements of interest. These studies are mainly qualitative, in the absence of standardization. Suitable software is used to program the micro-beam to delve to specific depths in sample matrices, and the technique is subject to rigorous calibration and background correction. Minor perturbations in instrumental performance are adjusted by internal standards. Overall, the technique is of considerable use in materials analysis.
Mingli Qin
University of Science and Technology Beijing, P.R. China
Title: Synthesis of carbon hollow spheres by a modified hydrothermal carbonization method
Time : 12:05-12:25
Biography:
Mingli Qin is Vice Director of Beijing Key Laboratory for Advanced Powder Metallurgy Technology and Particulate Materials and Professor of Institute for Advanced Materials and Technology at University of Science and Technology Beijing, Beijing, China. His primary research interest is synthesis of advanced powder, powder metallurgy technology with a special emphasis on powder injection molding. He published about 100 articles and 20 Chinese patents. He is a member of the editorial board of 《Powder Metallurgy Technology》 and a fellow of three technical societies.
Abstract:
Carbon hollow spheres have many unique properties, such as high surface-to-volume ratio, thermal insulation, high chemical stability and structural stability, and are applied in fields of catalyst supports, fuel cells, gas storage and separation, batteries and supercapacitors. Here, hydrothermal carbonization and emulsion template method were combined to facilely prepare carbon hollow spheres. About the formation mechanism in our synthesis, trioctylamine droplet in water played the role of soft template, and the hydrothermal carbonization took place on the surface of the droplet. The shapes of carbon hollow spheres were different with varying the amount of surfactant and reaction time. And bow-like hollow spheres, nut-like hollow spheres and smooth carbon hollow spheres could be obtained. The metal catalyst of hydrothermal carbonization could also result in the change of morphology of the product.
Christina Scheu
Max-Planck-Institute, Germany
Title: Transmission electron microscopy – a versatile tool to study the microstructure of HT-PEMFC
Time : 12:25-12:45
Biography:
Prof. Christina Scheu has a diploma degree in physics and did her doctorate 1996 at the Max-Planck-Institute for Metals Research in Stuttgart (Germany) in the field of material science. 2008 she was appointed as a full professor at the Ludwig-Maximilian-University (Munich, Germany). Since April 2014 she holds a joint position as an independent group leader at the Max-Planck-Institut für Eisenforschung GmbH (MPIE) in Düsseldorf and as a full professor at the RWTH Aachen, Germany. She has more than 170 publication in journals and conference proceedings.
Abstract:
Different types of fuel cells exist which produce electricity in an environmentally friendly way. High-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) are based on hybrid materials where inorganic metal oxides and or carbon support materials are combined with a proton conducting polymer. The microstructure, the phase distribution and the occurring interfaces are key parameters which determine the performance. Due to the size of the individual grains and catalyst particles, high spatial resolution techniques are required to characterize the constituting materials in detail. In our work we analyze them in depth by different transmission electron microscopy (TEM) techniques, considering not only their atomic structure but also the elemental distribution and oxidation states of the individual atoms. The TEM measurements are also done on the polymer which is sensitive to electron beam bombardment. Investigations on polybenzimidazole (PBI)-based membranes containing inorganic fillers revealed that the nanoparticles are homogenously distributed and consist of amorphous silica [1]. A segregation of P or Cl to the particle – PBI interface was not detected. With the insights obtained by TEM we were able to explain the properties [1]. We also analyzed HT-PEMFCs containing tungsten oxide support materials after different operation times and modes including start-stop-cycles and identified different degradation phenomena and the corresponding microstructural changes [2].
[1] C. Heinzl et al. Journal of Membrane Science 478 (2015) 65.
[2] C. Heinzl et al. Journal Electrochemical Society 162 (2015) F280.
[3] C. Heinzl, T. Ossiander, S. Gleich, K. Hengge, M. Perchthaler and V. Hacker are gratefully acknowledged.
Tianlong Liu
Chinese Academy of Sciences, P. R. China
Title: Hollow polydopamine nanoparticles loaded ionic liquid and doxorubicin for combined chemotherapy and microwave thermal therapy of cancer
Time : 12:45-13:05
Biography:
Tianlong Liu has completed his PhD at 2008 from Chinese Agricultral University and postdoctoral studies from Technical Institute of Physics and Chemistry, Chinese Academy of Sciences. He is a associate professor of TIPC, CAS. He has published more than 30 papers in reputed journals.
Abstract:
Tumor microwave thermal therapy (MWTT) has attracted more attention owing to the minimal damage to body function, convenient manipulation and low complications. Recently, combinational therapy has been increasingly employed in the treatment of cancer. In this study, hollow polydopamine nanoparticles were developed as favorable biocompatible delivery nanoplatforms for chemotherapy and microwave thermal therapy. By loading polydopamine nanoparticles with ionic liquid, the functionalized polydopamine nanoparticles became chemotherapeutic drug nanocarriers for combinational therapy. The obvious antitumor efficacy of doxorubicin-loaded ionic liquid–polydopamine nanocomposites was demonstrated in in vitro and in vivo experiments for combined chemotherapy and microwave thermal therapy. Encouraging antitumor effect was observed when tumor bearing mice received ILs/PDA nanoparticles by intravenous injection and only single microwave irradiation. Moreover, the combination of chemotherapy with microwave thermal therapy applied to cancer therapy based on drug-loaded ionic liquid–polydopamine nanocomposites is a promising therapy for future cancer treatment in clinical applications. Furthermore, the cytotoxicity and acute toxicity study in vivo of PDA showed the excellent biocompatibility of ILs/PDA nanocomposites. In addition, the degradation of ILs/PDA nanocomposites in simulated body fluid illustrated the low potential hazard when they entered the blood. The emergence of PDA as a novel and feasible platform for cancer thermal therapy will promote the rapid development of microwave therapy in clinics.
Panel Discussions 13:05-13:10
Lunch Break 13:10-13:55 @ Foyer
Shanthi Iyer
North Carolina A&T State University, USA
Title: GaAs/GaAsSb(N) heterostructured nanowires grown by molecular beam epitaxy
Biography:
Prof. Iyer has been responsible for the initiation and development of North Carolina A&T State University’s, Greensboro, NC state of the art MBE laboratory and associated academic and research programs. She was also the Director of the Center of Excellence for Battlefield Capability Enhancements, with focus on developing technologies for environmentally stable flexible panel displays. Her current interests are in the MBE growth, characterization and devices of low dimensional semiconductor structures for optoelectronic device applications. She has published over 50 articles in refereed journals and proceedings.
Abstract:
Semiconductor nanowires (NWs) are currently creating a significant impact in the electronics and optoelectronic research fields due to their intrinsic one dimensional architecture along with a “nano” dimensional contact enabling greater flexibility in band-gap engineering and material design architecture, leading to novel and unique opto-electronic properties. Thus planar NWs represent a new paradigm with advanced nanoheterostructure configurations that is inconceivable in thin films, opening up opportunities for transformational improvements particularly in optoelectronic devices. NW applications in optoelectronics are still evolving. In particular, wavelengths in the telecommunication wavelength region of 1.3-1.55 µm, have been of great interest for potential use in optoelectronic devices for photonic integrated circuits as well as in single photon detection for optical quantum information applications. In this talk, growth of dense and vertical oriented ternary and quaternary III-V heterostructured nanowires of GaAsSb(N) on (111) Si by vapor-liquid-solid (VLS)/vapor-solid (VS) mechanisms via self-catalyzed molecular beam epitaxy will be presented. Band gap tuning up to 1.3 µm in GaAs/GaAsSb(N) has been realized in core-shell heterostructured nanowires by varying the Sb(N) content. All the NWs exhibit zinc blende structure. Our preliminary results using Raman and temperature dependence of PL spectroscopy along with the corresponding Schottky barrier heights indicated NW configuration to be a better template for efficient annihilation of the N induced point defects in dilute nitride NWs in comparison to its thin film counterpart. The improvements in the µ-photoluminescence characteristics due to the surface passivation by GaAlAs shell and chemical passivation and its impact on the noise characteristics of the PIN device will be presented.
Ramesh K. Agarwal
Washington University in St. Louis, USA
Title: Recent progress in acoustic metamaterials membranes for low frequency sound attenuation
Biography:
Professor Ramesh K. Agarwal is the William Palm Professor of Engineering at Washington University in St. Louis. From 1994 to 2001, he was the Sam Bloomfield Distinguished Professor and Executive Director of the National Institute for Aviation Research at Wichita State University in Kansas. From 1978 to 1994, he worked in various scientific and managerial positions at McDonnell Douglas Research Laboratories in St. Louis. He became the Program Director and McDonnell Douglas Fellow in 1990. Dr. Agarwal received Ph.D in Aeronautical Sciences from Stanford University in 1975, M.S. in Aeronautical Engineering from the University of Minnesota in 1969 and B.S. in Mechanical Engineering from Indian Institute of Technology, Kharagpur, India in 1968. He is the author and coauthor of over 500 publications and serves on the editorial board of 20+ journals. He has given many plenary, keynote and invited lectures at various national and international conferences worldwide. He is a Fellow of AAAS, ASME, AIAA, IEEE, SAE and SME.
Abstract:
Low frequency noise has long been regarded as a form of noise pollution due to its high penetrating power. The reduction of low frequency noise from aircraft and automobile engines remains a challenge since the conventional acoustic liners are not able to absorb the low frequency noise radiation. Membrane-type acoustic metamaterials (MAMs) have demonstrated unusual capacity in controlling low-frequency sound transmission and reflection. The MAM is composed of a pre-stretched elastic membrane with attached rigid masses. In this keynote paper, the problems associated with low frequency noise will be discussed. The recent analytical/computational/experimental research on acoustic metamaterial membranes in controlling and attenuating the low frequency noise will be presented.
- Track 2: Nanotechnology in Materials Science
Track 3: Energy Materials
Track 9: Emerging Areas of Materials Science and Nanotechnology
Session II
Location: Chattahooche-A
Chair
Avin Pillay
The Petroleum Institute, UAE
Co-Chair
Zong-yi Ma
Chinese Academy of Sciences, China
Session Introduction
Hyung Wook Park
Ulsan National Institute of Science and Technology, Republic of Korea
Title: Large pulsed electron beam surface treatment of woven carbon fiber/ZnO nanorod/polyester resin composites
Time : 13:55-14:15
Biography:
Hyung Wook Park is an associate professor at the Ulsan National Institute of Science and Technology. He was a senior researcher in KIMM. He received his PhD from Georgia Institute of Technology in 2008. Before joining Georgia Tech, he worked at Hyundai Motor Company. He has published more than 54 papers in reputed journals
Abstract:
The surface modification of materials by large pulsed electron beam (LPEB) processing is an emerging eco-friendly technique that can be applied to relatively large surface areas. In this study, a polyester-based woven carbon fiber (WCF)/ZnO nanorod hybrid composite was developed using a vacuum-assisted resin transfer molding process. LPEB processing was used to modify the surface of the carbon fiber (CF) composite prior to the growth of the ZnO nanorods. The effects of this electron beam treatment on WCFs were investigated by scanning electron microscopy as a function of ZnO nanorod growth. LPEB treatment resulted in a remarkable increase in the growth of ZnO nanorods. This increase, which resulted in an increase in the electrical resistance of the samples, was further investigated by X-ray diffraction analyses. LPEB-treated samples exhibited higher impact resistance due to strong interactions among the ZnO, CF, and polyester resin.
Xianwei Meng
Chinese Academy of Sciences, China
Title: The design, synthesis and application of microwave susceptible agents for tumor microwave thermotherapy based on confinement mechanism
Time : 14:15-14:35
Biography:
Xianwei Meng received his Ph.D. in biomedical engineering from the Sichuan University in 2001. He became an assistant professor at the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences in 2001 and an associate professor in 2006. He holds 25 patents and has published over 100 journal articles. His research focuses on the synthesis and applications of nanomaterials.
Abstract:
As the development of technology, thermal therapy of tumors has been widely applied in clinical field. Especially that the microwave thermal therapy of tumors has attracted much interest recently due to the maneuverability, faster heat generation from microwave radiation, depth of penetration in tissues, less susceptibility to local heat tissues and perfect ability of killing tumor cells. While it is difficult to limit the microwave into tumor region without damaging normal tissues. The microwave heating dose cannot be controlled accurately during the microwave thermal therapy procedure. These greatly restrict the development of microwave thermal therapy technology. Based on the confinement efficiency, we package microwave susceptible unit into hollow micron or nano-sized structure, to enhance the microwave thermal conversion efficiency and resolve the difficult of targeted heating tumor region. Simultaneously, we combine CT imaging unit to realize CT imaging guided microwave thermal therapy, which can control the microwave heating dose accurately.
Soubantika Palchoudhury
University of Tennessee, USA
Title: Synthesis and characterization of hybrid nanoparticles for biomedical and environmental remediation applications
Time : 14:35-14:55
Biography:
Soubantika Palchoudhury is a Visiting Assistant Professor in Chemical Engineering at the University of Tennessee Chattanooga. Soubantika has completed her PhD from The University of Alabama (2012) and postdoctoral studies from Yale University, University of South Carolina, and The University of Alabama. She has published over 20 articles in journals like Nano Letters, Langmuir, and ChemComm and three book chapters. Her research on water-solube iron oxide nanoparticles has been highlighted in Nature. Soubantika has also reviewed for several high-impact journals. Her research interests lie in the synthesis of hybrid nanoparticles like Pt-iron oxide and CuZn2InS4 for biomedical and energy applications.
Abstract:
Iron oxide nanoparticles have attracted tremendous attention as potential candidates for enhancing the contrast in magnetic resonance imaging, targeted therapeutics, and remediation agents because they are inherently less toxic and magnetic. This talk will demonstrate an approach to sustainably use iron oxide nanoparticles as platforms for developing improved therapeutics and oil spill remediation agents. The synthesis of hybrid nanoparticles as multifunctional therapeutics will be presented in detail using Pt-iron oxide nanoparticles as the model system.1The talk will also describe the application of magnetic nanoparticles to develop engineered materials for treatment of BP oil spill samples.2The significance of material properties and material characterization of thesenew nanoparticles in exploring enhanced applications will be highlighted throughout the talk.
Kenta Miura
Gunma University, Japan
Title: Luminescent periodic microstructures for medical applications
Time : 14:55-15:15
Biography:
Kenta Miura received his B.E. degree in communication engineering (1998), and his M.E. (2000) and Ph.D. (2003) degrees in electronic and communication engineering from Tohoku University, Sendai, Japan. He joined the Japan Science and Technology Agency as a researcher in 2003. He moved toGunma University, Kiryu, Japan as a Research Associate in 2004and became an Assistant Professor in 2007. Since 2010, he has been an Associate Professor of Gunma University. His current research interests are light-emitting materials produced using sputtering and their device applications.
Abstract:
Various works on silicon (Si)-based luminescent materials (such as Si nanocrystal (Si-nc)) utilizing the quantum confinement effect have been reported. A typical fabrication method of Si-ncs is co-sputtering of Si and SiO2. Blue-, red-, white-, and near-infrared-light emissions were observed from such co-sputtered films. However, emission efficiencies of such Si-based luminescent materials remain low. In particular, extraction efficiencies seem to be very low because of the total reflections at their surfaces. Integrating periodic microstructures on light-emitting diodes (LEDs) is one way of achieving a high extraction efficiency. It was also reported that two-dimensional (2-D) periodic microstructures can effectively extract the light emitted from active layers of LEDs according to diffraction laws. This paper will demonstrate2-D periodic microstructures composed of Si-based luminescent thin films by using co-sputtering Si and SiO2, simple double-interference exposure, and plasma etching. An enhanced photoluminescence peak around a wavelength of 800 nm observed from a luminescent periodic microstructure will be presented. Because Si-based materials have biocompatibility and the transmittance of a human body at the wavelength 800 nm, I believe that Si-based light-emitting devices for medical applications can be realized by utilizing our technologies. Details will be presented at the conference.
Syed Nasimul Alam
National Institute of Technology Rourkela, India
Title: Alumina-based nanocomposites using graphite nanoplatelets as reinforcement
Time : 15:15-15:35
Biography:
Syed Nasimul Alam received his B.Tech. from Indian Institute of Technology Kharagpur, India, in Metallurgical and Materials Engineering. He did his MS in photonics and electronic materials in Chemical and Nuclear Engineering Department at University of Massachusetts Lowell, USA. He did his PhD in the Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, India in the field of mechanical alloying. He is currently an assistant professor at National Institute of Technology Rourkela, India. His major interests are nanomaterials and nanocomposites. He has published more than 20 papers in reputed journals and has published two books on MATLAB.
Abstract:
Graphene has outstanding mechanical properties and unique electrical and thermal properties which makes it an attractive filler and a good reinforcement for producing multifunctional ceramics for a wide range of applications. Here, alumina (Al2O3) based nanocomposites have been developed using exfoliated graphite nanoplatelets (xGnP) as reinforcement. The xGnP were synthesized by subjecting a graphite intercalation compound (GIC) to a thermal shock. The Al2O3 and xGnP powders were mixed by milling them for a short period of time in order to ensure homogeneous distribution of xGnP in the Al2O3 matrix. Al2O3-0.2, 0.5, 0.8, 3 and 5 vol. % xGnP nanocomposites were developed by powder metallurgy route. Sintering was done conventional sintering process. The hardness, fracture toughness and tribological properties of the composites having different vol. % xGnP loading were investigated. Results show a significant improvement in the wear resistance of the Al2O3-xGnP composites having more than 0.8 vol. % xGnP loading. The improvement in mechanical properties is attributed to the uniform dispersion of xGnPs and toughening mechanism such as xGnP bridging, crack deflection and strong interaction between xGnP and Al2O3 at the interfaces. Results of the dry sliding wear tests of the composites with different vol. % xGnP loading suggest a significant improvement in the wear resistance of the composites upto the addition of 3 vol. % xGnP. The hardness of the composites also show a gradual increase upto the addition of 3 vol. % xGnP beyond which there is a deterioration in both the hardness and the wear properties.
G. T. Chandrappa
Bangalore University, India
Title: BiVO4 and WO3 nanophotocatalysts: water-splitting and environmental applications
Time : 15:35-15:55
Biography:
G.T. Chandrappa completed his M.Sc. and Ph.D degrees from University of Mysore. He worked as Post-doc with Prof. K. C. Patil, Bangalore, well known combustion scientist. He was then introduced to nanomaterials during his postdoctoral tenure with Prof. Jacques Livage at Universite Paris, France, and published a novel material V2O5 in a reputed journal Nature. He is the recipient of MRSI medal for the year 2015. He is in credit of two patents and 95 research publications in international/national journals. Eight Ph.D were awarded and six more are working under his guidance. His research has been supported financially by Indian Government granting several research projects.
Abstract:
Water splitting and photocatalytic degradation of organic pollutants are promising reactions for solving fundamental energy and green issues. The search for suitable semiconductors as photocatalysts for the splitting of water into hydrogen gas using solar energy is one of the noble missions of material science. An optimal material would combine an ability to dissociate the water molecules, having a band gap that absorbs light in the visible range and to remain stable in contact with water. Among semiconductors, BiVO4 and WO3 have attracted considerable interest in recent years due to small band gap, stable physicochemical properties, resilience to photo-corrosion effects and significant incident photo-to current conversion efficiencies. m-BiVO4 and WO3 nanoparticles as photocatalysts for H2 evolution, which works under UV-light irradiation, have been synthesized by a facile solution combustion synthesis method. The estimated band gap of BiVO4 and WO3 particles are ~2.52 eV and ~2.845 eV respectively. The yields of hydrogen generated are ~489 m mol ~457 μ mol per 2.5 h for BiVO4 and WO3 as photocatalysts of reactions under UV irradiation. The BiVO4 and WO3 powders show highly visible photocatalytic activity towards methylene blue degradation under sun light irradiation. The H2 evolution and photocatalytic activity of BiVO4 and WO3 powders can be attributed to their physical properties such as nanosized particles and large surface area.
Abd. Rashid bin Mohd Yusoff
Kyung Hee University, South Korea
Title: Null current hysteresis for acetylacetonate based perovskite solar cells as electron extraction layer
Time : 15:55-16:15
Biography:
Abd. Rashid bin Mohd Yusoff received his BA in Physics with Education from Universiti Putra Malaysia, his MSc. in Applied Physics from Universiti Malaya, and his PhD in Physics from Universidade Federal do Parana, Brazil. After graduation in 2011, he joined the faculty in the Department of Information Display at the Kyung Hee University as a post-doctoral fellow studying organic photovoltaic (OPV), organic light emitting diodes (OLEDs), and quantum-dots light emitting diodes (QLEDs). In 2012, he was promoted as a Research Professor at Kyung Hee University and continues working on OPV and OLEDs as well as QLEDs. In 2012, he became the group leader responsible for the development of high efficiency OPV joint program between South Korea and Japan. In early 2015, he was selected as a Guest Professor at Ecole Polytechnique Federal de Lausanne, where he works closely with Professor Md. Khaja Nazeeruddin on perovskite solar cells. He has published more than 60 articles in these fields and being invited to various seminars and conferences. He also contributed 4 book chapters and edited 2 books on graphene under Wiley-VCH Verlag; i) Graphene-based Energy Devices and ii) Graphene Optoelectronic: Synthesis, Characterizations, Properties, and Applications. In addition, we is also one of the technical organizing committees for the 3rd Conference on New Advances in Condensed Matter Physics (NACMP 2016, February 28-March 1), Beijing, China. Furthermore, he was also an Editor-in-Chief of Theme Collection in Nanoscale (Graphene-based Energy Devices) (Royal Society of Chemistry). His research interests include electronic properties of organic semiconductor thin films, charge transport properties, device physics, organic and inorganic-based light emitting devices, organic photovoltaic and organic transistors.
Abstract:
Solution processed zirconium acetylacetonate (Zr(acac)) is succesfully employed as an electron extraction layer, replacing conventional titanium oxide, in planar CH3NH3PbI3 perovskite solar cells. As-prepared Zr(acac) film posseses high transparency, high conductivity, a smooth morphology, high wettability, compatibility with PbI2 DMF solution, and an energy level matching that of CH3NH3PbI3 perovskite material. An average power conversion efficiency of about 11.93%, along with a high filling factor of 74.36%, an open circuit voltage of 1.03 V, and a short-circuit current density of 15.58 mA/cm2. The overall performance of the devices is slight better to that of cells using ruthenium acetylacetonate (Ru(acac)). The difference of solar cells with different electron extraction layers in charge recombination, charge transport and transfer and lifetime are further explored and demonstrate that Zr(acac) is a more effective and promising electron extraction layer. This work provides a simple, and cost effective route for the preparation of an effective hole extraction layer.
Networking & Refreshments Break: 16:15-16:30 @ Foyer
Shrok Allami
Ministry of Science and Technology, Iraq
Title: Nitrogen doping into ZnO branched nanowire by plasma treatment and its effect on photo electrochemical performance
Time : 16:30-16:50
Biography:
Shrok Allami is a Scientific Researcher in Ministry of Science and Technology, Renewable Energy Directory, Department of Hydrogen and Biofuel. She has completed her PhD in 2007 from University of Technology, Iraq. She has published more than 22 papers in reputed journals, participated in more than 15 national and international conferences and their committees, and has been serving as an Editorial Board Member of Iraqi scientific journals.
Abstract:
Photoanode of ZnO branched nanowires, BNW, doped with nitrogen was fabricated to be used in photochemical cell for hydrogen generation from water splitting process. ZnO BNW was first synthesized by hydrothermal method. Followed by two experimental groups, time controlled DC glow discharge plasma treatment, and time controlled DC magnetron plasma treatment to optimize nitrogen doping into nanowire structure. Via X-ray photoelectron spectroscopy (XPS) results, nitrogen distribution into BNW and N atomic percentage were demonstrated. XPS studies confirm nitrogen distribution into ZnO BNW as N substitution at O sites of ZnO nanowires and as well-screened molecular nitrogen. The morphologies and structure of fabricated nanostructures were investigated by field-emission scanning electron microscope and XRD respectively. Photo anode performance exhibited from photo-electrochemical studies that demonstrated upon dark and illumination at various power densities. It was found that increasing N content into ZnO BNW lead to increase photocurrent on PEC.
Davoud Dastan
Savitribai Phule Pune University, India
Title: Polymeric nanocomposites gate dielectric for organic thin film transistors
Time : 16:50-17:05
Biography:
Davoud Dastan has completed his MSc at the age of 28 years from Savitribai Phule Pune University. He is a Ph.D. student at Savitribai Phule Pune University, India. He has published more than 17 papers in reputed journals and has participated more than 30 international conferences.
Abstract:
Nanoparticulates semiconductor oxides have played an essential role in photovoltaic devices such as field effect transistors (FET’s). Organic-inorganic nanocomposites are ideal candidates which have been used as gate dielectric materials since they exhibit high dielectric constant and are low cost and easy processing materials. Zirconia nanoparticles were incorporated into poly vinyl alcohol (PVA) and ammonium dichromate and cross-linked under ultraviolet (UV) irradiation. The solution of PVAad+ZrO2 was spun onto flourine coated tin oxide (FTO) substrates and gold was thermally evaporated on the surface of the specimens. The obtained results demonstrated an improvement in the electrical performance of the devices when zirconia was embedded onto the polymer matrix and used as a gate dielectric. The electrical characteristics of the devices were investigated using semiconductor parameter analyzer. Current-voltage graphs showed a reduction in ideality factor after UV curing whereas the results of current-voltage curves demonstated a remarkable enhancement in the dielectric constant of the polymeric matrix. The capacitance remained constant as the frequency increased from mHz to MHz. The micrograph images aqcuired from field emission scanning electron microscopy illustated an increase in the surface roughness of the composite films owing to the compact structures of such composite films which were included dense of irregular spherical zirconia nanoparticles. Energy-dispersive X-ray spectroscopy (EDS analysis) of the devices delineated the presence of Zr, Cr, C, O, N, and Sn (due to FTO substrate). Overall, the EDS results illustrated the predominant incorporation of ZrO2 into the polymer matrix.
Avnika S Anand
Defence Research and Development Organization, India
Title: Engineered metal oxide nanoparticles, nano-bio interaction and toxicology
Time : 17:05-17:20
Biography:
Avnika Singh Anand is M.Tech. Biotechnology gold medal awardee from SHAITS, U.P., India. Currently, she is pursing PhD. at Defence Institute of Physiology & Allied Sciences (DIPAS), New Delhi, India. Our current research at Neurobiology Division, involves the studies to unravel the molecular basis of nanomaterial toxicity. I am also currently involved in the new field of Toxicoproteomics which integrates different interdisciplinary areas. Toxicoproteomics involves traditional toxicology and pathology, differential protein and gene expression analysis and systems biology. This field is uniquely positioned for better understanding of the diseases process, early diagnosis, timely intervention and promotes public health. Our lab is focused on development of a wide spectrum of promising nanoscale materials & novel drug targeting (nanotechnology based) strategies to control the protein modifications and subsequent control of disease process and progression.
Abstract:
Metal oxide nanoparticles (NPs) are commonly used nanomaterials. The nano-level size offer these metal oxides potential of novel properties ensuing not only in high end technologies but also in consumer oriented applications. Nanotechnology is latest endeavor, which has advanced tremendously in last few years, but it still lacks well laid guidelines and in-depth toxicological studies. How these metal oxide NPs and there ionic form will react in varying biological interface and long term effects are not well defined? In our research we have made an attempt to study the acute and chronic effects of the commonly used metal oxide nanoparticles, Al2O3 NPs and ZnO NPs in Drosophila melanogaster. The exposure dose includes 0.1- 1mM NPs in Drosophila diet and flies were exposed throughout their lifespan. Toxicological effects post exposure was evaluated on various parameters like: climbing ability, fecundity, lifespan, oxidative stress, apoptosis and incidence of aberrant phenotype in subsequent generations. Significant decline in climbing ability was observed in parent flies on seven days exposure to these NPs. Significant increase in reactive oxidative species and apoptotic cells was observed in larvae hemocytes via DCF-DA and TUNEL assay. Distinctive aberrant phenotypic changes like deformed segmented thorax, loss of wing, deformed body symmetry was observed in subsequent generation on ZnO NPs exposure. Chronic exposure of Al2O3 NPs resulted in flies with pigmented and segmented thorax and deformed legs. Our observations clearly depicted that these nanoparticles can cause detrimental effects to subsequent generations.
Najmeh Bolandhemat
Universiti Putra Malaysia, Malaysia
Title: Density functional theory calculations for the electronic, magnetic, and chemical bonding properties of geometrically frustrated spinel CdCr2O4
Time : 17:20-17:35
Biography:
Najmeh Bolandhemat has completed her M.Sc. in Condensed Matter from Shiraz University, Iran, and is in her last year of PhD in Materials Science in Department of Physics, Universiti Putra Malaysia (UPM). Prior to moving to Malaysia as a PhD student, she was a research assistant in Shiraz University, and Instructor of General Physics, Solid State Physics, Principle of Modern Physics, and Electromagnetism laboratory in Fars Science and Research branch University. Currently, she is a research assistant in Science faculty of UPM University.
Abstract:
Density functional calculations are performed to investigate the effects of magnetic ordering on the electronic structure and bonding properties of CdCr2O4 with non-magnetic Cd cations and magnetic Cr cations from a pyrochlore lattice. We calculated the electronic structures, magnetic properties, and chemical bonding properties of geometrically frustrated Spinel CdCr2O4 using density functional method combined with the spin-polarized density functional theory, and compared our results in both cubic and tetragonal structures. In order to optimize the crystal structures of spinel CdCr2O4, we used the plane-wave ultrasoft pseudopotential technique within the generalized gradient approximation (GGA). The exchange and correlation potential was described within the generalized gradient approximation (GGA) based on exchange-correlation energy optimization to calculate the total energy, and the effect of magnetism were obtained and analyzed on the basis of total density of states (DOS), partial density of states (PDOS), and charge density distribution within paramagnetic, ferromagnetic and antiferromagnetic orderings. Also, the electronic charge density distribution in the (1 1 0) crystallographic planes were obtained, for both cubic and tetragonal structures, to explain and compare the bonding properties of spinel CdCr2O4 in PM, FM, and AFM orderings.