ICACC’14 Award & Plenary Speakers
Sheldon Wiederhorn, Senior Fellow Emeritus, National Institute of Standards and Technology
Title: From the Rattler Test to Modern Fracture Mechanics: A Perspective on Toughness
Abstract: In this talk, we project backwards to a time when there was no materials science, no fracture mechanics and no way to characterize or modify the microstructure of materials in a controlled way. There were no universal mechanical test machines and no standard means of establishing how a material would perform under a given load regime. Yet the needs for mechanical reliability were there, just as they are today. In this talk we review some of the problems encountered at the beginning of the 20th century that are still problems today. We shall show how the development of fracture mechanics and modern techniques of microstructural analysis have enabled the solution of mechanical problems associated with the use of ceramics in modern applications. In the course of the lecture we will trace the development of fracture mechanics from the early 20th century to the present day and the replacement of performance tests with design criteria based on fracture mechanics analysis.
Biography: Wiederhorn received his BS in Chemical Engineering from Columbia University and his MS and PhD from the University of Illinois, in Chemical Engineering. He is best known for the experiments that he developed to characterize sub critical crack growth in glasses. The results of these studies illustrate the complexity of subcritical crack growth. He has received many awards for his research and leadership at NIST. These include both a Silver and Gold Medal by the Department of Commerce, and the Samuel Wesley Stratton Award, by the National Bureau of Standards. He is also a Fellow and a Distinguished Life Member of ACerS and has received a number of important awards for his research.
Bridge Building Award
José A. Varela, CEO, São Paulo State Research Funding Agency; professor, University of São Paulo State, Brazil
Title: Building Bridges in Materials Science and Technology: An Important Issue for Solving Basic Problems in Modern Society
Abstract: With the world population at 7 billion and growing we are stretching the limits of the earth’s natural resources. To achieve our global goals of environmental health and economic development it is crucial that we find new and effective ways to use science and technology to meet our expanding energy needs while reducing gas emissions to minimize climate change. This is a global challenge and each nation must find its own individualized means to contribute solutions to this problem. Those challenges need more collaboration among worldwide scientists as well as an open science. Our recent knowledge in nanoscience and nanotechnology, in particular functional oxide semiconductors, has opened many doors for solving key technological problems. Developing new materials is multidisciplinary field and building bridge for scientists and engineers is an important issue to have more efficient materials solution for the future of humankind. There are several ranges of forming networks for scientists in Materials Science including those in the same research institution, among different research institutions, between research institutions and industries (for innovation), and at different countries.
Biography: Varela received his BS in Physics from the University of São Paulo in 1969 and MS in Physics at Technological Institute of Aeronautics in 1975, both in São Paulo State, Brazil. He received his PhD in Materials Science from the University of Washington, USA in 1981. He is a member of several scientific societies including ACerS (Fellow), MRS, Brazilian MRS (Past President) and Brazilian Physics Society. He is also a member of the International Academy of Ceramics (Advisory Board) as well as member of Brazilian Academy of Science and member of the Academy of Science of São Paulo State. He is currently serving as Principal Editor of the JMR and JACerS. Professor Varela’s main research interests are centered in synthesis and processing of nanostructured functional materials in bulk, thin and thick films for several applications including varistor, gas sensors, photoluminescence, ferroelectric and multiferroics. He has authored or co-authored more than 580 indexed papers (WOS) and his work have received more than 9,000 citations with H factor of 43 and holds 11 BR patents. His research programs have received multiple awards, including São Paulo State Governor Award (1992), Epsilon de Ouro Prize given by Spanish Ceramic Society (2003), Scopus Prize given by Elsevier (2008), and Global Star Award given by Engineering Division of The American Ceramic Society (2013).
Willard Cutler, technology director, environmental technology, Corning Incorporated
Title: The Need and Potential of Porous Ceramic Materials
Abstract: A substantial amount of work over many decades has been aimed at developing understanding to create defect-free, fully dense ceramic bodies. However, there is an equal need for understanding and industrialization of porous ceramic bodies with well-engineered pores. The talk will provide an overview of specific aspects of porous materials including: Commercial uses, materials selection, porosity creation, processing, characterization and properties. Specific examples will be provided from pollution control and filtration sectors.
Biography: Cutler joined Corning in 1989, spending eight years in Research before joining Product Development. In 2001 he was appointed manager, Diesel Product Development, leading the successful product development of several technologies including the DuraTrap® AT filter product and Asymmetric Cell Technology. Cutler transferred to Corning GmbH in 2003, spending nearly four years in Europe helping to establish and build the European light-duty diesel business as European New Products manager and then as Applied Technology director. In 2007, he was appointed business technology director, New Business Development with responsibilities for technology delivery for Corning’s emerging businesses. In August 2009, after assisting with CET’s consolidation and restructuring, he was appointed to his current role as technology director, Environmental Technologies with responsibilities for technology development and delivery in addition to commercial technology. He also serves on the board of Cormetech. Cutler holds a Ph.D. in Materials from the University of California, Santa Barbara and a bachelor’s degree in Materials Science & Engineering from the University of Utah. He has been awarded 17 patents and has published a number of scientific papers.
Ulrich Simon, professor, chair of inorganic chemistry and electrochemistry, RWTH Aachen University, Germany
Title: Nanostructured Metal Oxides in Gas Sensing Applications: Challenges and Perspectives
Abstract: The talk will address the challenge of identifying structure-property relations and descriptors for a rational design of gas sensing materials consisting either on semiconducting nanoparticles or ion-conducting nanoporous materials. Selected examples will (i) demonstrate the potential of high throughput experimentation in search of new selective gas sensors, and will (ii) introduce zeolites as a chemically variable class of nanoporous proton conductors, which can be tuned for optimized in particular for exhaust gas monitoring.
Biography: Simon studied chemistry at the University of Essen and obtained his doctorate in 1992 and became an associate professor after having finished his habilitation in 1999 on charge transport properties of nanostructured solids. Since 2000 he is the director at the Institute of Inorganic Chemistry at the RWTH Aachen University (Germany) and holds the Chair of Inorganic Chemistry and Electrochemistry. The main interest of his current research includes the synthesis, the assembly, and the electrical properties of metal and semiconducting nanoparticles and of nanoporous materials, as well as their application in gas sensing, nanoelectronics and biomedicine. He is author of more than 150 peer-reviewed publications and has filed 15 patents.
Global Young Investigator Award
Eva Hemmer, post-doctoral researcher, Institut National de la Recherche Scientifique (INRS – Centre EMT), Canada
Title: Ln3+-Doped Gd2O3 Nanostructures for NIR-NIR Bioimaging
Abstract: Bioimaging is an important tool allowing the visualization and understanding of biomedical processes. However, the main disadvantage of common organic dyes is color fading, auto-fluorescence, phototoxicity and scattering when UV light is used as the excitation source. Consequently, the penetration depth is limited. Yet, the use of NIR light reduces phototoxicity and scattering resulting in deeper penetration and imaging of deeper tissue areas becomes possible. NIR absorbing and emitting compounds are promising candidates to overcome the disadvantages of common dyes. Facing the need of new, reliable NIR-NIR biomarkers, Gd2O3:Er3+,Yb3+ nanorods and particles were synthesized by hydrothermal and precipitation processes. Their suitability as biomarkers for 980-nm excited NIR emission was investigated. In-vitro tests revealed a cytotoxic effect in case of incubation of macrophages with bare nanostructures, which was deduced from the poor chemical stability of Gd2O3 under the acidic conditions found inside macrophages, but it could be overcome with surface modification with PEG-b-PAAc. The in-vivo biodistribution in mouse organs was investigated with an over-1000-nm NIR in-vivo fluorescence bioimaging system. This system allows the time-resolved observation of the distribution of the nanostructures in the mouse body. The use of Gd2O3 doped with Ho3+ besides Er3+ allows multicolor imaging based on their 1.2 and 1.5-m emission.
Biography: Hemmer received her German-French double diploma in Materials Science from Saarland University, Germany and École Européenne d’Ingénieures en Génie des Matériaux, France in 2004. The focus of her work was the molecular design of nanomaterials starting from suitable metal-organic precursors. By chemical vapor deposition process, sol-gel, and solvothermal synthesis these precursors are decomposed resulting in nanoscale oxide thin films or powders. From 2009 to 2012, Eva Hemmer has been working as a post-doctoral fellow in the laboratory of Prof. Kohei Soga at Tokyo University of Science in Japan. In November 2012, she joined the groups of Prof. François Légaré and Prof. Fiorenzo Vetrone at Institut National de la Recherche Scientifique (INRS – Centre EMT) in Varennes, Canada as post-doctoral researcher. She has 13 publications in international peer-reviewed journals and gave more than 20 presentations at international conferences.
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