Imaging Molecular Adsorbates and Chemical Reactions on Metal Surfaces by Scanning Tunneling Microscopy

通过扫描隧道显微镜对金属表面上的分子吸附物和化学反应进行成像

• 批准号: 9520366
• 负责人: Shirley Chiang
• 金额: $ 24.75万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1999-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9520366&HistoricalAwards=false
• 关键词: Imaging; Molecular; Adsorbates; Chemical; Reactions

The development of scanning tunneling microscopy for the imaging of molecular adsorbates is the goal of this research project, supported in the Analytical and Surface Chemistry Program. An ultra high vacuum scanning tunneling microscope will be used to image selected molecular adsorbate systems and surface chemical reactions. Small aromatic molecules adsorbed on Pd(111) surfaces will be investigated both experimentally and theoretically to develop an understanding of the STM imaging mechanism, and to determine the limits of real space and real time observation of chemical reactions on surfaces. Cyclization of acetylene to benzene will form the focus of reaction studies. In order to develop a microscopic understanding of chemical reactions catalyzed by noble metal surfaces, real space and real time structural information must be obtained. The goal of this research project is to develop both the experimental methods and the theoretical understanding needed to use scanning tunneling microscopy to provide this structural information.

开发用于分子吸附成像的扫描隧道显微镜是本研究项目的目标，该项目得到了分析和表面化学计划的支持。超高真空扫描隧道显微镜将用于成像选定的分子吸附系统和表面化学反应。我们将从实验和理论两方面研究吸附在Pd(111)表面的芳香族小分子，以加深对STM成像机制的理解，并确定真实空间和实时观察表面化学反应的极限。乙炔环化制苯将成为反应研究的重点。为了发展对贵金属表面催化化学反应的微观理解，必须获得真实的空间和实时的结构信息。这个研究项目的目标是发展使用扫描隧道显微镜来提供这种结构信息所需的实验方法和理论理解。