报告题目:Understanding Heterogeneous Nucleation in Nanocrystal Growth with a Molecular Probe by Surface-Enhanced Raman Scattering
报告人:Professor Dong Qin，Georgia Institute of Technology
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). Her current research focuses on the unique properties and applications of nanoscale materials and systems
Bimetallic nanocrystals, made of two different metal species, have properties that are often superior to their single-metal counterparts. In this talk, I will report our recent progress to address the challenge by developing a class of molecules, the isocyanides (molecules containing the -NC chemical group), as probes for in situ characterization with detection of the isocyanides by a spectroscopic technique, surface-enhanced Raman scattering (SERS). I will demonstrate that the vibrational frequency of 2,6-dimethylphenyl isocyanide (2,6-DMPI) can serve as a distinctive reporter for platinum and palladium atoms being deposited on the edges of silver nanocubes, with a detection limit well below one monolayer.