The Surface Spectroscopy of a Single Aerosol Particle

单个气溶胶颗粒的表面光谱

• 批准号: 8905871
• 负责人: Stephen Arnold
• 金额: --
• 依托单位: Polytechnic University of New York
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-09-01 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8905871&HistoricalAwards=false
• 关键词: Surface; Spectroscopy; Single; Aerosol; Particle

This research will extend work on the spectroscopy of single levitated aerosol particles into the surface region with the development of three new spectroscopies. The first, surface tension spectroscopy, to provide a measure of the surface molecular excess; the second, electromagnetic sounding (using fluorescence and second harmonic generation), to provide microscopic information on molecular orientation at the surface and the distribution of molecules in the interior; and the third, phase boundary phase shift spectroscopy, to provide an on-line measure of the water condensation rate at the surface. This will be the first application of all three spectroscopies to investigate microscopic effects associated with water condensation in the presence of surface active species of atmospheric interest. Preparation of surface coatings having specific densities will be facilitated by the use of a proposed microparticle collider. This research will provide new techniques for the study of atmospheric aerosol physical and chemical property.

这项研究将随着三个新的光谱镜的发展，将单个悬浮的气溶胶颗粒的光谱传播到表面区域。首先是表面张力光谱，以提供表面分子过量的度量；第二个电磁声（使用荧光和第二次谐波产生），以提供有关表面分子取向以及内部分子分布的微观信息；第三相边界相移光谱法提供了表面水冷凝率的在线度量。这将是所有三种光谱学的首次应用，以研究与大气感兴趣的表面活性物种存在下与水冷凝相关的微观效应。通过使用拟议的微颗粒对撞机，可以促进具有特定密度的表面涂层的制备。这项研究将为大气气溶胶物理和化学性质的研究提供新技术。