Studies of the Structure, Phase Transitions, and Dynamics ofAdsorbed Films

吸附膜的结构、相变和动力学研究

• 批准号: 9011069
• 负责人: Haskell Taub
• 金额: $ 25.85万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9011069&HistoricalAwards=false
• 关键词: Studies; Structure; Phase; Transitions; Dynamics

This research is concerned with the study of a variety of problems of current interest in surface physics. These include: 1) the study of the multilayer structure of the simplest (rare gas) films as well as novel structures in molecular monolayers; 2) the observation of collective vibrational excitations in quasi-two-dimensional molecular solids and their analysis to infer intermolecular and molecule substrate interactions; and 3) the study of phase transitions in adsorbed films which either do not occur in bulk solids, or which may be more tractible theoretically in low dimensions. The experiments will employ inelastic and quasielastic neutron scattering to investigate monolayer dynamics and both elastic neutron diffraction and synchrotron x-ray scattering to probe film structure.

这项研究涉及到各种各样的研究， 表面物理学中当前感兴趣的问题。 其中包括： 1)最简单的多层结构的研究（罕见的 气体）膜以及分子单层中的新颖结构; 2)集体振动激发的观测 准二维分子固体及其分析 推断分子间和分子底物相互作用;以及3） 研究吸附膜中的相变， 不会出现在散装固体中，或可能更易处理 理论上是低维的 实验将采用 非弹性和准弹性中子散射来研究 单层动力学和弹性中子衍射， 同步加速器X射线散射以探测膜结构。