报告题目：Three-dimensional characterisation of nanoclusters at atomic scale
报告人: Prof. Ziyou Li
报告时间：2013年12月31日14:00-15:00 （周二下午）
报告地点：硅材料国家重点实验室1号楼104（报告厅）
邀请人：电镜中心金传洪
详细报告摘要如下：
Three-dimensional characterisation of nanoclusters at atomic scale
Z.Y. Li
Nanoscale Physics Research Laboratory,
School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, U.K.
E-mail: Z.Li@bham.ac.uk
Clusters and nanoparticles occupy special places in fundamental research and practical applications. To understand the properties of functional nano-structures, it is essential to gain full knowledge of their three-dimensional atomic structures. However, this is still a challenging task for clusters and nanoparticles. In this talk, the current status of cluster structure research will be briefly reviewed, together with what an aberration-corrected scanning transmission electron microscopy (STEM) can offer in this area. The STEM capabilities will be illustrated by examples from our recent research in nano-catalysis and nano-optics: (1) counting gold atom by atom; and (2) seeing below surfaces.In both cases, direct evidence of atomistic details at surface, subsurface and interfaces will be presented and the size-dependent effects and their mechanistic origins will be discussedwith computer modeling results. The possibility of linking the atomic structures of nanoclusters with their enhanced catalytic properties or novel optical properties will be discussed.
Dr. Ziyou Li obtained her BSc in physics from Fudan University in 1982 and PhD in physics in 1989 at Cavendish Laboratory, University of Cambridge in U.K. She is now a Reader in Nanoscale Science, and Head of Quality Assurance in the School of Physics and Astronomy, University of Birmingham. Dr. Li is a committee member of IoP Electron Microscopy Analysis Group since 2009. She is alsoa committee member of British Vacuum Council, as IUVSTA Surface Science Divisional Representative for Great Britain,since 2010.
