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6月18日外宾学术报告

来源： 发布时间：2010-06-17【字体：大 中 小】

题目：Computer simulations of radiation induced defect formation and rare earth ion clustering in silicate glasses

报告人：杜金城教授

单位：美国North Texas大学

时间：2010年6月18日下午3：00

地点：溢智厅

报告人简介：

Dr. Jincheng Du is currently tenure track Assistant Professor at the Department of Materials Science and Engineering of University of North Texas (USA). His research interests lie in atomistic simulations of complex materials and systems for photonics, microelectronics, energy and biomedical applications.

Dr. Du obtained his PhD in Ceramics from Alfred University, Alfred New York in 2004. He finished postdoc training at the Chemical and Materials Science Division at Pacific Northwest National Laboratory (PNNL) (2004-2006) in US. After that, he worked as research associate in the department of Chemical Engineering of University of Virginia (2006-2007) before joining UNT as a faculty member in the fall of 2007.

Dr. Du is an expert in computer modeling and simulations of glass materials. He has over 30 peer reviewed publications in distinguished journals including Nature, Physical Review B, Journal Chemical Physics, and Journal of American Ceramic Society with more than 250 accumulated citations. Dr. Du is a technical committee member of the TC23 Atomistic Modeling of Glasses at International Commission of Glasses (ICG). He has chaired and co-chaired conference sessions and symposium at international conferences, including the most recent Glass and Optical Materials meeting at Corning NY (May 2010). Dr. Du is a member of American Ceramic Society, Material Research Society and American Chemical Society.

报告简介：

With ever improvement of computing power and maturing of simulation algorithms, computer simulation has become an important branch of materials research. Due to the inherent complexity of the structure of glass materials, computer simulation and modeling have greatly contributed to our understanding of the structure and behavior of glasses. In this talk I will present our recent studies of radiation induced defect formation and structure rare earth doped glasses. The first topic is on molecular dynamics simulations of erbium implantation induced defect formation and transformation in crystalline and vitreous silica. In addition, I will present computer simulations of rare earth doped silicate glasses and the study of the clustering phenomenon using large scale molecular dynamics simulations. Lastly, I will present Density Functional Theory calculations of charge trapping in germanium doped silica glasses to understand UV irradiation induced refractive changes in these glasses.

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