功能高分子材料教育部重点实验室

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密歇根大学 Prof. Zhan Chen学术报告

发布人:功能高分子材料教育部重点实验室    发布时间:2017/05/05   浏览次数: 233 次




报告人:Prof. Zhan Chen (Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, US)

题 目:Molecular Structures of Buried Polymer/Liquid and Polymer/Solid Interfaces

时 间:201755日下午4:00

地 点:南开大学 蒙民伟楼 201


报告简介:

Understanding molecular surface/interface structures of polymers and biomolecules is important for many applications and processes, such as biomaterial design, anti-biofouling control, bio-adhesion, biosensing, modern micro- and nano-electronic devices, nano-imprinting, and blood coagulation. However, it is difficult to examine polymer and biological interfaces due to the lack of appropriate techniques. Most surface sensitive techniques require high vacuum to operate and cannot provide molecular structural information. In many cases, polymer and biological molecules need to be studied in situ, e.g., at solid/liquid interfaces. Prof. Chen’s group has developed systematic methodologies to examine molecular structures of complex surfaces and interfaces in situ in real time using state-of-the-art sum frequency generation (SFG) vibrational spectroscopy, supplemented by other techniques, such as Fourier transform infrared spectroscopy (FTIR), FTIR-attenuated total reflection (FTIR-ATR) spectroscopy, contact angle goniometry, Raman scattering, circular dichroism spectroscopy and fluorescence spectroscopy. We applied such methodologies to elucidate molecular structures of many important surfaces and interfaces, greatly impacting many research areas in analytical chemistry, physical chemistry, biochemistry, chemical biology, materials chemistry, environmental chemistry, medicinal chemistry, surface and interfacial science, biophysics, molecular spectroscopy, and macromolecular science and engineering. Currently we are investigating surface immobilized peptides for antimicrobial coatings, surface immobilized enzymes for biosensing, antifouling polymer coatings, membrane peptides and proteins, nanomaterial-cell interactions, buried interfaces in solar cells and batteries, and polymer adhesion. We are also developing instrumentation and data analysis methodology for vibrational spectroscopic and nonlinear optical spectroscopic
methods.
1. Effect of Interfacial Molecular Orientation on Power Conversion Efficiency of Perovskite Solar Cells, J. Am. Chem. Soc., 2017, 139, 3378.
2. An Engineered Surface-immobilized Enzyme that Retains High Levels of Catalytic Activity in Air, J. Am. Chem. Soc., 2017, 139, 2972.
3. Molecular Interactions between Graphene and Biological Molecules, J. Am. Chem. Soc., 2017, 139, 1928.
4. Engineering and Characterization of Peptides and Proteins at Surfaces and Interfaces: A Case Study in Surface-Sensitive Vibrational Spectroscopy, Acc. Chem. Res., 2016, 49, 1149.
5. Probing Site-specific Structural Information of Peptides at Model Membrane Interface in Situ, J. Am. Chem. Soc., 2015, 137, 10190