09/24/18 - 4:00 PM to 5:00 PM
Special Seminar: Professor Wei Xiong
Wei Xiong is an assistant professor in the Department of Chemistry and Biochemistry at the University of California, San Diego, where his group develops novel nonlinear optical spectroscopy to study molecular structure and dynamics at interfaces. Previously, he was a postdoctoral researcher in JILA (formerly known as the Joint Institute for Laboratory Astrophysics), University of Colorado, Boulder (2011-2014). He received his doctorate in chemistry from University of Wisconsin-Madison in 2011, and his Bachelor of Science degree in chemistry from Peking University in 2006.
The goal of the Professor Xiong's research group is to develop new spectroscopic techniques for observing ultrafast processes of interfaces, enabling breakthrough technologies. To achieve this goal, the group is combining concepts and techniques from chemistry and physics, in particular, they have focused on pushing the frontier of a powerful interfacial-sensitive spectroscopy, named Sum Frequency Generation (SFG) spectroscopy, by adding new dimensions (in time, frequency and space) to this established technique.
Primarily, Professor Xiong's research focuses on several directions fields. First, researchers want to prove the electronic structure and dynamics of solid/solid interfaces by developing novel spectroscopies, including Electronic SFG spectroscopy, and Transient Electric-Field-Induced Vibrational SFG spectroscopy. Second, they have been revealing the relationship between molecular conformation and dynamics of electrochemical liquid/solid interfaces, using Heterodyne 2D Vibrational SFG spectroscopy. Third, researchers recently developed spatial-resolved vibrational SFG microscope to image complex molecular self-assembled structures, which reveal micro-size domains with specific molecular packings. Lastly, a recent endeavor has been focused on studying a new hybrid light-matter materials – molecular polariton, by performing the first 2D IR spectroscopy to learn the dynamics and coupling between various states in molecular polariton.