关于举行美国康涅狄格大学 Thomas Seery副教授学术报告的通知

报告题目：Light scattering made difficult: polyelectrolytes in nonaqueous media and scattering from light absorbing solutions

报告人： Thomas Seery 副教授（University of Connecticut）

报告时间：2016年6月23日（周四）下午3:30

报告地点：北区光电国重 502会议室

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报告摘要：

Dynamics light scattering is a powerful tool for the in situ characterization of macromolecular species in solution. The time scale for data acquisition is rapid enough for kinetic work, sizes and size distributions can be obtained, and, when total intensities are acquired, molecular weights and virial coefficients can also be determined. However, in some systems, extraordinary behavior or anomalous scattering can occur and be difficult to interpret. Polyelectrolytes in low salt exhibit scattering that points to dynamics that are not explained or predicted by theory. Work in our lab and elsewhere has demonstrated that these dynamic phenomena are present but masked at higher salt concentrations. Since polyelectrolytes are commonly in need of characterization it is important to understand what the results of a simple DLS measurement are telling us. Light absorbing solutions show the effects of dissipating the heat resulting from absorption and this complicates the interpretation of the DLS relaxation function. Since absorption of light occurs with many systems of interest – conducting polymers, nanoparticles, proteins, carbon nanotubes – there is some value in developing an interpretation of these data that provides information on molecular sizes.

报告人简介：

Dr Thomas Seery earned a Bachelor degree in Chemistry at Harvard University in 1985 and a Ph.D. in Chemistry at the University Of Southern California in 1991. Following the completion of his PhD, he undertook post-doctoral research position working at University Of Southern California and University Of California for 3 years. Dr. Thomas Seery currently working at University of Connecticut as an Associate Professor since 2000, and been there for the past 20 years teaching Polymer Physical Chemistry, Introductory Chemistry and Physical Chemistry. His research interests involve the synthesis of nanocomposites as well as tackling difficult problems in light scattering.