Presidential Young Investigator Award: Studies of Time - Dependent Fundamental Surface Phenomena.

这个总统青年研究者奖项目是在分析和表面化学的一般领域和在动态表面过程的子领域。该奖项所支持的研究活动的重点是基本表面现象的时间依赖性。表面扩散、表面弛豫动力学、解吸动力学以及表面上的振动和电子能量弛豫是研究的主要领域。这些研究是在表征良好的金属、半导体和氧化物表面上进行的，这些表面与多相催化、电子器件制造和光化学能量转换有关。为了测量表面扩散和表面反应动力学，乔治教授利用激光诱导热脱附（LITD）技术。特别感兴趣的是LITD技术探索表面添加剂（如碳和硫）对催化相关过程表面动力学的影响的能力。他还使用LITD技术来研究半导体加工过程中重要的表面动力学。此外，George教授正在探索硅表面的化学键和反应动力学，使用透射傅里叶变换红外光谱（FTIR）作为这些表面过程的振动光谱探针。他还试图利用激光诱导荧光（LIF）技术表征介电氧化物表面上发色团之间的相互作用和电子能量转移，该技术可提供具有亚单层灵敏度的结构和时间相关信息。

This Presidential Young Investigator Award project is in the general area of analytical and surface chemistry and in the subfield of dynamic surface processes. The emphasis of the research activities that are enabled by this award is on the time- dependence of fundamental surface phenomena. Surface diffusion, surface relaxation kinetics, desorption dynamics, and vibrational and electronic energy relaxation on surfaces are the main areas of investigation. These studies are being performed on well- characterized metal, semiconductor, and oxide surfaces that are relevant to heterogeneous catalysis, electronic device fabrication, and photochemical energy conversion. In order to measure surface diffusion and surface reaction kinetics, Professor George is utilizing laser-induced thermal desorption (LITD) techniques. Of particular interest is the ability of LITD techniques to explore the effects of surface additives such as carbon and sulfur on the surface kinetics of catalytically relevant processes. He is also using LITD techniques to investigate the surface kinetics of processes that are important in semiconductor processing. Additionally, Professor George is exploring chemical bonding and reaction kinetics on silicon surfaces using transmission Fourier transform infrared spectroscopy (FTIR) as a vibrational spectroscopic probe of these surface processes. He is also seeking to characterize the interactions and electronic energy transfer between chromophores on dielectric oxide surfaces using laser induced fluorescence (LIF) techniques that provide both structural and time-dependent information with sub-monolayer sensitivity.