Microscopic Surface Diffusion of Molecular Chemisorbates

这项补助金是在一般领域的分析和表面 化学和动力学反应研究领域. 金属表面 这所大学的贾尼斯·阿勒特-罗比教授 马里兰州的科学家将使用一种独特的脉冲分子束源， 观察吸附和扩散的时间依赖性， 分子在铂上的特定拓扑不同位点 单晶表面 使用红外光谱 检测分子反应位点的数量和类型 将被确定。 这将对理解产生影响 表面形态上不同的部位 化学反应性 脉冲分子束源将被构建和使用 研究一氧化碳和一氧化氮的扩散 在阶梯状铂表面上。 然后，研究将转移到 更复杂的化学系统，腈，单齿 结合位点。 红外信号的校准将允许 物种浓度的绝对测定. 具体网站。 此外，理论合作模拟 分子扩散的动力学将由 这项工作的实验结果。

This grant is in the general area of analytical and surface chemistry and in the subfield of dynamic reaction studies at metal surfaces. Professor Janice Reutt-Robey of the University of Maryland will use a unique pulsed molecular beam source to observe the time dependence of adsorption and diffusion of molecules at specific topologically distinct sites on platinum single crystal surfaces. Using infrared spectroscopic detection the amounts and types of molecular reactions sites will be determined. This will have impact on the understanding of the role of morphologically distinct sites on surface chemical reactivity. The pulsed molecular beam source will be constructed and used to study the diffusion of carbon monoxide and nitrogen monoxide over stepped platinum surfaces. The study will then move to more chemically complex systems, nitriles, with monodentate binding sites. Calibration of the infrared signal will allow absolute determination of the concentrations of species at specific sites. Further, theoretical collaboration to simulate the dynamics of molecular diffusion will be supported by the experimental results from this work.