CAREER: Femtosecond Infrared Spectroscopic Study of Interfacial Chemical Reaction Dynamics in Semiconductor Nanoparticle Colloids

埃默里大学的Tianquan Lian得到了实验 物理化学计划，以研究化学动力学 在纳米颗粒的载体-液体界面处发生的反应 胶体使用飞秒红外激光光谱。 他将专注于 这些系统中的两个基本过程：光诱导界面 电荷转移动力学和随后的界面双分子 自由基的化学反应动力学 本教育计划 CAREER奖强调将激光光谱学纳入 本科课程，以及基于问题的实施 本科理科班的学习技巧。 半导体纳米粒子是一类重要的新材料。 他们提供了独特的机会，研究基本问题， 化学、物理和材料科学的跨学科领域， 以及许多潜在的应用如太阳能转换， 废物降解和纳米电子学。 详细了解 这些研究的结果将对 半导体纳米颗粒的应用，因为工艺将 研究确定的效率和化学稳定性的任何 由这种纳米颗粒制成的装置。 本研究的结果还将 增加了对固液动力学的一般理解 接口，这是必不可少的设计和应用程序的许多 太阳能电池、电化学等重要器件和工艺 和多相催化。

Tianquan Lian of Emory University is supported by the Experimental Physical Chemistry Program to investigate the dynamics of chemical reactions occurring at the semiconductor-liquid interface of nanoparticle colloids using femtosecond infrared laser spectroscopy. He will focus on two fundamental processes in these systems: photo-induced interfacial charge transfer dynamics and the subsequent interfacial bimolecular chemical reaction dynamics of radicals. The education plan of this CAREER award emphasizes the incorporation of laser spectroscopy into the undergraduate curricula, as well as the implementation of Problem Based Learning techniques in undergraduate science classes. Semiconductor nanoparticles are an important class of new materials. They offer unique opportunities to study fundamental problems in the interdisciplinary areas of chemistry, physics and materials science, as well as many potential applications such as solar energy conversion, waste degradation, and nanoelectronics. The detailed understanding resulting from these studies will have an important impact on the application of semiconductor nanoparticles, since the processes to be studied determine the efficiency and the chemical stability of any devices made from such nanoparticles. Results from this study will also add to the general understanding of the dynamics in the solid-liquid interface, which is essential for the design and application of many important devices and processes such as the solar cell, electrochemistry and heterogeneous catalysis.