Abstract:
Sum-frequency generation vibrational spectroscopy (SFG-VS) is a powerful surface/interface selective and sub-monolayer sensitive spectroscopic technique to interrogate the vibrational spectroscopy, structure and conformation, as well as optical activity, and vibrational dynamics of molecular surfaces and interfaces. The difficulties that have limited the application of SFG-VS to broad scientific problems regarding complex surfaces and interfaces, such as the difficulties in spectral assignment, accurate measurement and experimental as well as computational analysis of the SFG spectrum, have been mostly overcome with the recent developments.
This presentation discusses recent development in SFG-VS, particularly on the development on the sub-wavenumber high resolution broadband SFG-VS (HR-BB-SFG-VS) using synchronized long picosecond and short sub-100 femtosecond laser pulses, and the future perspectives of the applications of SFG-VS to surface/interface studies and beyond.
Biography:
Dr. Hongfei Wang, born in 1968, is currently a distinguished Professor of Chemistry at Department of Chemistry of Fudan University at Shanghai (2017.01-present) and Professor of School of Science at West Lake University. He obtained his B.S. degree in chemical physics from the Department of Chemical Physics of University of Science and Technology of China (USTC) at Hefei, China in 1988, and did graduate study with professor Xingxiao Ma at the same department on laser chemistry till May 1991. He then obtained his Ph.D. degree in physical chemistry at the Department of Chemistry of Columbia University in 1996 with Professor Kenneth Eisenthal. After two and half years of postdoctoral work with Professor Hai-lung Dai at the Department of Chemistry of University of Pennsylvania, jointly with DuPont Marshall Laboratory at Philadelphia, he joined the Molecular Reaction Dynamics Laboratory at the Institute of Chemistry, Chinese Academy of Sciences (ICCAS) at Beijing as a professor (1999.3-2009.6). At ICCAS he served as the director of the Molecular Reaction Dynamics Laboratory (2000-2004) and the deputy director of the State Key Laboratory of Molecular reaction Dynamics (2000-2004). He was selected into the Hundred Talent Program of the Chinese Academy Sciences (1999-2002) and was awarded the Distinguished Young Investigator Fund of the National Natural Science Foundation of China (2005-2008). In June 2009, he joined the Environmental Molecular Sciences Laboratory (EMSL) at the Pacific Northwest National Laboratory (PNNL) of the Department of Energy (DOE) in the United States as a Chief Scientist, before he joined Fudan University in January 2017. He was selected into the Thousand Talent Program (long-term) of Shanghai in 2017, and the National Thousand Talent Program (long-term) in 2018. His research has focused on structure, conformation and dynamics of molecular surfaces and interfaces using mainly surface nonlinear spectroscopy and ultrafast dynamics, such as surface second harmonic generation (SHG) and sum-frequency generation vibrational spectroscopy (SFG-VS). His main contribution is on the quantitative measurement and methodology for analysis of SHG and SFG-VS of complex molecular surfaces and interfaces, particularly in the development of systematic polarization measurement and analysis, as well as in the development of the first sub-wavenumber broadband high-resolution SFG-VS spectrometer. Professionally, he had served as the managing associated-editor of the Chinese Journal of Chemical Physics (2006-2009) and was elected as the fellow of the American Physical Society (APS fellow) in 2012.
Seminar Series by the NYU-ECNU Center for Computational Chemistry at NYU Shanghai