Lecture Topic：Polarized Resonance Synchronous Spectroscopy: A New Analytical Technique for Material Characterization and Process Monitoring from Small Molecules to Large Nanoparticle Assemblies

Lecturer: Dr. Zhang Dongmao, Professor and Doctoral Supervisor at Mississippi State University

Lecture Time: May 27, 2019, 15:00-17:00

Lecture Location: Mingde Building A203

Lecture Content:

Optical spectroscopic techniques including UV-vis absorption, scattering, and fluorescence emission have been the most popular methods for material characterizations in chemistry, biology, and material research. Despite their long history and popularity, existing tools are limited in their ability in quantification of the photon absorption, scattering, and fluorescence activities for many realistic materials that are simultaneous light absorbers and scatterers, and sometimes emitters. The polarized resonance synchronous spectroscopic (PRS2) technique developed by the Zhang group successfully resolved a series of issues limiting the quantitative understanding of material optical properties. By using combined measurements made with a conventional UV-vis spectrophotometer and a spectrofluorometer that is equipped with linear excitation and detection polarizers, this PRS2 method enables acquisition of a series of fundamental optical parameter spectra that are difficult or impossible to obtain before. After a brief introduction of the theoretical background and data acquisition and analysis procedures, the utility of this new spectroscopic method will be discussed using a few representative examples ranging from small solvent molecules, dispersed molecular fluorophores, to large molecular and nanoparticle assemblies.

About the Lecturer:

Dr. Dongmao Zhang is a Professor of Chemistry in the Department of Chemistry at the Mississippi State University (MSU) in USA. He obtained Ph.D. in Analytical/Physical Chemistry at Purdue University in 2002, and then worked in Purdue Discovery Park for three years, rising from PhD research associate, assistant research scientist, to research scientist. He worked as an Analytical Chemist in GE for two years. He joined MSU as an assistant Professor in 2008 after a two-year stint as a research scientist at Rice University. His research interests include interfacial interactions of plasmonic gold and silver nanoparticles, optical spectroscopic techniques, and analytical method developments. His recent awards and recognitions include: Chemist of the Year (2017) by the Mississippi State Chapter of American Chemical Society; Top ten most prolific authors in the world for theJournal of Physical Chemistry Cfor the most recent five year (2017); Dean’s Eminent Scholar (2015); NSF CAREER award (2013). He has published more than eighty articles in the Journal of Physical Chemistry C, Analytical Chemistry, Nano Letters, and JACS.

Hosted by:

School of Chemistry and Chemical Engineering

Office of Academic Research, SWPU

Sichuan Provincial Key Laboratory of Oil and Gas Field Applied Chemistry