Experimental and Theoretical Investigations of Surface Photochemistry

表面光化学的实验和理论研究

• 批准号: 9202523
• 负责人: Peter Stair
• 金额: $ 43.42万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9202523&HistoricalAwards=false
• 关键词: Experimental; Theoretical; Investigations; Surface; Photochemistry

This award is made by the Office of Special Projects in the Chemistry Division under the Materials Synthesis and Processing Initiative. The research is a combined experimental and theoretical effort to understand how the presence of a surface influences the photochemistry of an adsorbed molecule. Specific objectives are to use experimental measurements and theoretical simulations to understand how the substrate affects the photodissociation of a bond in an adsorbed molecule and to investigate how the branching among various reaction pathways depends on this elementary step. Experiments will be carried out on methyl iodide and iodine cyanide, whose gas-phase photodissociation dynamics are well known, adsorbed on magnesia, titania and gold, representing an insulator, a semiconductor, and a metal. Surface analysis, mass spectrometry, and gas phase laser-based spectroscopicmeasurements will be employed to determine the branching among reaction pathways and the energy content of photofragments ejected from the surface. %%% The scientific issues addressed in the field of surface photochemistry are broadly relevant to such materials issues as photoassisted deposition, photoresists, surface photodegradation, photolithography and laser- and plasma-assisted etching.

该奖项由化学部特别项目办公室根据材料合成与加工计划颁发。该研究是实验和理论相结合的努力，旨在了解表面的存在如何影响吸附分子的光化学。具体目标是使用实验测量和理论模拟来了解底物如何影响吸附分子中键的光解离，并研究各种反应途径之间的分支如何取决于这个基本步骤。 实验将在甲基碘和氰化碘上进行，它们的气相光解动力学是众所周知的，吸附在氧化镁、二氧化钛和金上，分别代表绝缘体、半导体和金属。表面分析、质谱分析和基于气相激光的光谱测量将用于确定反应路径之间的分支以及从表面喷射的光碎片的能量含量。 %%% 表面光化学领域解决的科学问题与光辅助沉积、光刻胶、表面光降解、光刻以及激光和等离子体辅助蚀刻等材料问题广泛相关。