U.S.-France Cooperative Research: Infrared Synchrotron Radiation Studies of Adsorbate-Substrate Vibrations

美法合作研究：吸附质-基质振动的红外同步辐射研究

• 批准号: 9016771
• 负责人: Gwyn Williams
• 金额: $ 1.36万
• 依托单位: National Synchrotron Light Source
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-05-01 至 1995-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9016771&HistoricalAwards=false
• 关键词: U.S.; France; Cooperative; Research; Infrared

This award will support collaborative research in physics between Dr. Gwyn Williams, Brookhaven National Laboratory and Dr. Paul Dumas, Laboratoire de Spectrochimie Infrarouge et Raman, Thais, France. The objective of the project is to study low frequency modes of adsorbates on metal and semiconductor surfaces. Recent developments in infrared synchrotron radiation sources have led to the demonstration of their utility as a probe of low frequency absorbate-substrate vibrational modes. Such low frequency vibrations of adsorbed atoms and molecules contain direct information on the adsorbate-substrate bond, which controls the stability, reactivity and mobility of adsorbates. Few techniques can access these vibrations. Electron Energy Loss spectro-scopy (EELS) has provided the most abundant information due to its particularly good sensitivity. However, its resolution has limited its use for line-shape and isotopic shift studies, as well as for work at higher pressures. In this project, the US and French investigators will use the new infrared synchrotron radiation facility at Brookhaven to perform both and EELS studies on surfaces of transition and noble metals and semiconductors in the low frequency region, combining their expertise EELS (on the French side) and surface reflection-absorption spectroscopy (on the US side). Dr Williams is internationally recognized as a leader in synchrotron radiation spectroscopy and is responsible for the development of the far-infrared beamline at Brookhaven. Dr. Paul Dumas has developed an outstanding surface vibrational laboratory, including research on infrared, electron energy loss, and Raman and laser spe- ctroscopies. Results of this research are expected to contribute to the understanding of the geometry and bonding of adsorbates on surfaces, still one of the most important problems in surface science.

该奖项将支持物理学方面的合作研究 布鲁克海文国家实验室的格温威廉姆斯博士和 Paul大仲马博士，红外光谱化学和 拉曼，泰国，法国。 该项目的目标是 研究金属表面吸附物低频振动模式， 半导体表面 红外同步辐射光源的最新进展 已经证明了它们的实用性， 低频率振动模式。如此低 吸附原子和分子的频率振动包含 关于吸附物-基质键的直接信息， 控制吸附物的稳定性、反应性和流动性。 很少有技术可以访问这些振动。电子能量 损失光谱（EELS）提供了最丰富的 因为它的灵敏度特别高。 然而，它的分辨率限制了它对线形的应用 和同位素位移研究，以及在更高的工作， 压力在这个项目中，美国和法国的调查人员 将使用新的红外同步辐射设施， 布鲁克海文进行表面和EELS研究 过渡金属、贵金属和半导体 频率区域，结合他们的专业知识EELS（在 法国一侧）和表面反射-吸收光谱 (on美国方面）。威廉姆斯博士是国际公认的 作为同步辐射光谱学的领导者， 负责开发远红外光束线 在布鲁克海文。保罗大仲马博士已经开发了一个杰出的 表面振动实验室，包括研究 红外、电子能量损失、拉曼和激光光谱， 显微镜检查。这项研究的结果预计将 有助于理解几何和键合 吸附物的表面，仍然是最重要的 表面科学的问题。