报 告 人：Dr.Lin-Wang Wang(汪林望),Senior Staff Scientist, Lawrence Berkeley National Laboratory, USA

时间：2016年1月4日(周一)上午10:00-11:30

地点：物理学院LE523

报告内容简介：In this talk,the speakerwill present their recent work in studying surface ligand passivation, and the possible surface morphology changes due to ligand passivation. The first system is PbS quantum dot. The atomistic structure of surface PbS has been studied, andthe speaker willshow how ab initio calculation can be used to reveal the surface atomic structure, and the possible surface defect states of such systems. Another problem is surface passivation of metallic Pt nanocrystal. The ab initio calculation explain the mechanism of nanocrystal growth. It turns out that the growth is determined by kinetic process, instead of surface energy. The third example is CO coverage of Pt and Cu surface. It is found that such molecule coverage will induce morphology changes, thus will have major influence to their catalytic properties. Lastly, the speaker will show how GPU calculations can be used to accelerate all the above calculations.

报告人简介：Lin-Wang Wang, Ph.D, is a Senior Staff Scientist and the leader of the Computational Material Science and Nano Science Group in Lawrence Berkeley National Laboratory. He received Ph.D. and M.A. degree from the Physics Department, Cornell University in 1991 and 1988, and B.S. degree from Shanghai JiaoTong University in 1985. His research interest includesInorganic Nanocrystals、Semiconductor Alloys, Amorphous and Impurities、Nano Semiconductor Devices、Organic Systems、Surface，Interface，and Inorganic/organic attachment、Elastic Quantum Transports、Carrier Dynamics、Numerical Algorithm and Code Developments. He has published 260 refereed journal papers, including 8 papers published in《Science》，more than 13000 citations, h-index 52. He received INCITE project award, DOE(2007-2009, 2010-2012, 2013-2015); R&D 100 award(2013), Gordon Bell award(2008) and featured on the DOE Physicists at work website. He is a fellow of American Physical Society (2006), Honorary Professor, Computer Network Information Center, CAS (2013); and Oversea Scientist Excellence Team Award& Oversea Outstanding Young Researcher Award, NSFC(2004). His group website is:http://cmsn.lbl.gov.

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