*********************************
There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
*********************************
Summary Sentence: Join us as Dong Qin presents a talk on two strategies for the generation of Ag-M bimetallic nanocrystals in the core-frame and core-shell structure.
Full Summary: No summary paragraph submitted.
Dong QinDong Qin
Associate Professor
Georgia Tech/ MSE
Abstract:
Silver nanocrystals have fascinating optical properties known as localized surface plasmon resonance (LSPR), which is essential to application for surface-enhanced Raman scatting (SERS). However, the susceptibility of elemental Ag to oxidation often leads to corner truncations and thus deterioration of SERS activity. As another pitfall, Ag is limited in terms of catalytic application as it only shows activity towards oxidation reactions such as epoxidation, not reduction reactions. One can address the aforementioned limitations of Ag nanocrystals by introducing a second noble metal (M) such as Au, Pd, or Pt to generate Ag-M bimetallic nanocrystals. In this talk, I will present two strategies for the generation of Ag-M bimetallic nanocrystals in the core-frame and core-shell structure. Significantly, these bimetallic nanocrystals with integrated SERS and catalytic properties offer a unique probe for in situ detection and analysis of catalytic reactions by SERS. Building upon the prior success, I will also report our recent development of metal-sensitive SERS probes for better understanding the heterogeneous nucleation and early-stage deposition of metal atoms (M) on the silver cubic seeds in solution.
Biography:
Dong Qin is an Associate Professor of MSE at Georgia Tech, with an adjunct appointment in the School of Chemistry & Biochemistry. Her academic records include a B.S. in Chemistry from Fudan University (1990), a Ph.D. in Physical Chemistry with Professor Hai-Lung Dai from University of Pennsylvania (1996), a postdoctoral stint with Professor George M. Whitesides at Harvard University (1996–1997), and an MBA from the University of Washington (2003). Before joining Georgia Tech in 2012, she held administrative positions as Associate Dean for Research in the School of Engineering and Applied Science at Washington University in St. Louis (2007–2011) and Associate Director of Center for Nanotechnology at the University of Washington (2002–2007). Her current research focuses on the unique properties and applications of nanoscale materials and systems.
Reception at 3:30 p.m. in the GTMI Atrium
