Surface Chemistry Studies with Ion Beams and Lasers

这一范围广泛的研究项目由分析和表面化学计划支持，研究离子/表面相互作用的基本原理，目标是开发和实施表面分析技术。在这项为期三年的标准拨款期间，宾夕法尼亚州立大学的Winograd教授和他的学生将对离子轰击表面解吸的原子和分子的能量和角度分辨分布进行测量。解吸的中性物种的正位化将被用于发展分子表面成像技术。这些过程的理论模型将与在这些研究中获得的详细实验信息密切结合。重点介绍这些方法在表面结构分析、表面成分成像和电子材料表征中的应用。利用离子束方法分析表面结构和成分是本研究项目的重点。对溅射离子和中性粒子的能量和角分布的详细测量将与这些过程的理论模型相结合，以便加深对将这些方法作为分子敏感表面成像工具加以实施所必需的理解。这项工作有望应用于电子设备制造、药物发现和结构生物化学领域的广泛问题。

This wide ranging research project, supported in the Analytical and Surface Chemistry Program, addresses the fundamentals of ion/surface interactions, with the goal of developing and implementing surface analytical techniques. During the tenure of this three-year standard grant, Professor Winograd and his students at the Pennsylvania State University will carry out measurements of energy and angle resolved distributions of atoms and molecules desorbed from ion bombarded surfaces. Postionization of the desorbed neutral species will be used to develop molecular surface imaging techniques. Theoretical modelling of these processes will be closely coupled with the detailed experimental information obtained in these investigations. Applications of these methods to surface structural analysis, compositional imaging of surfaces, and characterization of electronic materials will be stressed. The use of ion beam methods to analyze surface structure and composition is the focus of this research project. Detailed measurements of the energy and angular distribution of sputtered ions and neutrals will be coupled with theoretical modelling of these processes in order to develop the understanding necessary to implement these methods as molecularly sensitive surface imaging tools. Applications to a wide range of problems in the areas of electronic device manufacture, pharmaceutical discovery, and structural biochemistry are expected as a result of this work.