Controlling and Measuring the Local Chemical Environment

控制和测量当地化学环境

• 批准号: 0111366
• 负责人: Paul Weiss
• 金额: $ 31万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-15 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0111366&HistoricalAwards=false
• 关键词: Controlling; Measuring; Local; Chemical; Environment

Using an ultrastable low temperature scanning tunneling microscope, Professor Paul S. Weiss of Pennsylvania State University is examining the effects of local chemical environment on the chemistry of adsorbed molecules. With the support of the Analytical and Surface Chemistry Program, Weiss's group is imaging and analyzing spatially dependent perturbations of the surface electronic structure at adsorbates and surface defects. Using the ability to characterize and control defects in monolayer films, selected molecules are inserted into these defects in order to probe the chemistry of these species in this local environment. Single molecule vibrational spectroscopy of the adsorbed molecule is carried out as well, using inelastic electron tunneling spectroscopy.The detailed interactions of adsorbed molecules can be examined using scanning probe microscopy and inelastic electron tunneling spectroscopy. Professor Weiss and his group at the Pennsylvania State University are using these methods to examine the effect of the local chemical environment on the chemistry of adsorbed molecules. This information is useful for the fundamental insights it provides for a number of important technologies, including molecular electronic devices, micro-sensors, and heterogeneous catalysis.

宾夕法尼亚州立大学的Paul S. Weiss教授正在使用超稳定低温扫描隧道显微镜研究当地化学环境对被吸附分子化学性质的影响。在分析和表面化学项目的支持下，Weiss的团队正在成像和分析吸附物和表面缺陷的表面电子结构的空间依赖性扰动。利用表征和控制单层膜缺陷的能力，选择分子插入这些缺陷，以探测这些物种在局部环境中的化学反应。利用非弹性电子隧道能谱对吸附分子进行了单分子振动能谱分析。利用扫描探针显微镜和非弹性电子隧道能谱可以研究吸附分子的详细相互作用。宾夕法尼亚州立大学的Weiss教授和他的团队正在使用这些方法来研究当地化学环境对被吸附分子的化学性质的影响。这一信息对于它提供的一些重要技术的基本见解是有用的，包括分子电子器件、微传感器和多相催化。