报告人：Tsun-Kong (T.K.) Sham 院士
Professor, Canada Research Chair, FRSC
Department of Chemistry, University of Western Ontario, London, Ontario, Canada
Soochow University - Western University Centre for Synchrotron Radiation Research
题目：The Interplay of Synchrotron Spectroscopy with Performance of Functional Materials – Addressing Scientific Issues with Synchrotron Capabilities
地点：909号楼一楼B会议室(Conference Room B, 909-1F)
The advent of maturing synchrotron capabilities and nanotechnology has provided an exciting playground and unprecedented opportunities for materials research. The very bright, energy-tunable, highly collimated and pulsed synchrotron light sources of the third generation are making synchrotron light more readily available for a wide spectrum of materials research1. In this talk, a number of recent applications of synchrotron techniques will be presented. These include: X-ray Absorption Fine Structures (XAFS), X-ray Emission Spectroscopy (XES), X-ray Excited Optical Luminescence (XEOL) in both energy and time domain and Scanning Transmission X-ray Microscopy (STXM)2. Studies of ZnO-ZnS nano-composites, transition metal doped metal oxide semiconductors as well as energy materials, such as LiFePO4 battery materials3, Pt catalyst4 for fuel cells among others will be described to illustrate the unique solutions the synchrotron technology can provide. The prospects of emerging techniques such as High Energy X-ray Photoelectron Spectroscopy, High Energy Resolution X-ray Fluorescence and Resonant Inelastic X-ray Scattering Spectroscopy5 and their applications will also be noted.
1. T.K. Sham, “Nanoparticles and Nanowires: Synchrotron Radiation Studies”, International Journal of Nanotechnology 5, (2008)1194-1246.
2. Z. Wang, J. Wang, T.K. Sham, and S. Yang “Tracking the interface of an individual ZnS/ZnO nano-heterostructure", Journal of Physical Chemistry, C116, (2012) 10375?10381
3. J. Wang , J. Yang, Y. Tang, J. Liu, Y. Zhang, G. Liang, M. Gauthier, Y. K. Chen-Wiegart, J. Wang , M. Banis , R. Li , T.K. Sham, X.L Sun “New Nature of Surface/Interface of LiFePO4/Carbon”, Nature Communication, 5, 3415(2014).
4. S. Sun, G. Zhang, X. Meng, M. Norouzi Banis, D. Geng, R. Li, N. Gauquelin, G. Botton, N. Chen, J. Zhou, S. Yang, W. Chen, T.-K. Sham, X.-L. Sun, “Single atoms of Pt on graphene as highly active and CO-tolerant electrocatalyst for methanol oxidation” Scientific Report, DOI: 10.1038/srep01775, (2013).
5. L. Liu, T.K. Sham, H. Hayashi, N. Kanai, Y. Takehara, N. Kawamura, M. Mizumaki, R. A. Gordon, “Resonant Inelastic X-ray Scattering of CeB6 at the Ce L1- and L3-Edges” Journal of Chemical Physics 136, (2102) 194501(8)
T.K. Sham received his PhD in Chemistry from the University of Western Ontario studying M?ssbauer Spectroscopy with Professor G.M. Bancroft and his B.Sc. in Chemistry from the Chinese University of Hong Kong. In 1977, after a postdoctoral fellowship at Western, he joined the Chemistry Department at Brookhaven National Laboratory as Research Associate, moving up the rank to Chemist. He returned to Western in 1988 as an Associate Professor, promoted to Professor in 1991. He is presently Professor of Chemistry and Canada Research Chair in Materials and Synchrotron Radiation. From 1999 to 2008, he served as the Director of the Canadian Synchrotron Radiation Facility (CSRF) at the Synchrotron Radiation Center, University of Wisconsin-Madison. He is a founding member and a beam team leader of three beamlines at the Canadian Light Source (CLS), a Canadian national facility of advanced photon technology in Saskatoon, Saskatchewan.
Professor Sham’s research covers the chemistry and physics of materials and the development and application of synchrotron radiation, especially the interplay of electronic structure, materials performances in a given functionality with synchrotron capabilities. Areas of expertise include nanomaterial synthesis, surface and interface, photoemission, x-ray absorption, photon-in photon-out (X-ray emission, X-ray excited optical luminescence, resonant and non-resonant inelastic x-ray scattering via the X-ray and the Auger channel) and X-ray microscopy. His seminal papers include porous silicon (Nature, 1993), gold nanoparticles (Physical Review Letters, 2003) and blue light carbon quantum dots (Journal of American Chemical Society, 2007). His recent interest concerns nanostructure assembly for designed functionalities, X-ray induced optical emission from nanostructures in the energy and time domain, microbeam analysis of tissues and cultural and heritage materials, nanomaterials for drug delivery and green energy - Li ion battery, fuel cell and solar cell applications.
Professor Sham has published over 425 peered review papers. His papers have been cited over 8250 times with an h-index of 44. He has presented many seminars and lectures worldwide. Recent awards include the “Fellow of Royal Society of Canada” (2012), “J.C. Polanyi Award” of the Canadian Society for Chemistry (2010), “Distinguished Research Professorship” (2005) and the Award of Merit of the Federation of Chinese Canadian Professionals (Ontario) for contribution to society (2004). His lab has produced many highly qualified personnel; many are now faculty members at universities in Canada and abroad, or staff at CLS and synchrotrons in Europe, US and Asia. In addition to research and teaching, he participates actively in national and international scientific community affairs. He served as a member of the Board of Directors for the CLS (2001-2006) and Chair (2003-2006) of the International X-ray Absorption Society (IXAS). In 2012 he helped found the Soochow University - Western University Centre for Synchrotron Radiation Research in China and served as the Director to promote international collaboration in synchrotron research and education.