美国乔治亚理工秦冬副教授学术报告会

报告摘要：Silver nanoplates, a good example of two-dimensional nanostructures, exhibit an extreme degree of anisotropy in their shape and thus unique features in the localized surface plasmon resonances (LSPR) properties. Many groups have demonstrated that the size, shape, and morphology of Ag nanoplates can all be maneuvered to tailor their LSPR properties for a variety of applications in chemical/biological sensing and imaging. However, it remains a challenge to systematically and reproducibly control the production of Ag nanoplates. Part of the difficulty arises from the limited success in deviating the reaction from a thermodynamically controlled to a kinetically controlled pathway. In general, the Ag atoms have to be kept at an extremely low concentration in order to generate plate-like seeds with stacking faults and subsequently ensure their growth into nanoplates. In this talk, I will introduce a new synthetic strategy to produce Ag nanoplates with different morphology using a simple solvothermal (and hydrothermal) reduction of Ag⁺ ions. Specifically, I will demonstrate that citrate – the “magic” reagent that has been extensively used in most of the established protocols – is not necessary at all in the formation of Ag nanoplates. In fact, the exclusion of citrate not only improves the reproducibility of the synthesis but also gives the Ag nanoplates excellent stability. The potential applications of Ag nanoplates in LSPR sensing, surface-enhanced Raman scattering (SERS), and safe nanotechnology will be discussed.

个人简历：Dr. Qin is an Associate Professor in the School of Materials Science and Engineering, with an adjunct appointment in the School of Chemistry and Biochemistry, at Georgia Institute of Technology. She was born and raised in Shanghai, China. Her academic records include a BS in chemistry from Fudan University, a PhD in physical chemistry with Professor Hai-Lung Dai from the University of Pennsylvania, a postdoctoral stint in materials chemistry with Professor George M. Whitesides at Harvard University, and an MBA from the University of Washington. Her research interests center on the frontiers that bridge traditional fields of chemistry and materials science, with a focus on the peculiar properties and applications driven by materials and systems at the nanoscale. Her expertise includes nanomaterials, surface-enhanced Raman spectroscopy, soft lithography, self-assembly, colloidal physics and chemistry, and responsible development of nanotechnology.