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Clusters and Fluids at High Pressure: Ultrafast Dynamics

高压下的团簇和流体：超快动力学

基本信息

批准号：
9520839
负责人：
Ahmed Zewail
金额：
$ 93.74万
依托单位：
California Institute of Technology
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1995
资助国家：
美国
起止时间：
1995-08-15 至 2001-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9520839&HistoricalAwards=false
关键词：
Clusters Fluids Pressure Ultrafast Dynamics

项目摘要

9520839 Zewail Over the past three years, this research has been centered on the use of ultrafast laser spectroscopy to probe molecular dynamics. The new research will focus on three directions: (a) studies of real-time dynamics in large (nano) molecular clusters; (b) studies of the photophysical and photochemical dynamics of materials under high pressure, reaching up to 4000 atmospheres; and (c) the use of novel laser techniques to examine and control selective processes in inhomogeneous systems. The objectives are to resolve the primary picosecond and femtosecond dynamics under these novel conditions of controlled, size, density and distance, and to learn about forces governing the transition to the condensed phase limit. %%% This research is concerned with the investigation of the ultrafast dynamics in clusters and at high pressures. The goal is to use ultrafast laser techniques, with picosecond and femtosecond lasers, to resolve and study important features of the dynamics involved in the transition from the isolated molecule to the condensed-phase limit. Studies of microscopic large clusters and systems at high pressures offers unique opportunities to test, on a fundamental level, molecular interactions under controlled conditions of size, density, and distance. These studies will cover elementary and complex molecular systems. ***

小行星9520839 在过去的三年里，这项研究一直集中在使用超快激光光谱探测分子动力学。新的研究将集中在三个方向：（a）研究大（纳米）分子团的实时动力学;（B）研究材料在高达4000个大气压的高压下的物理学和光化学动力学;（c）利用新的激光技术检查和控制非均匀系统中的选择性过程。我们的目标是解决这些新的条件下的控制，尺寸，密度和距离的主要皮秒和飞秒动力学，并了解有关的力量管理过渡到凝聚相极限。本研究主要研究团簇和高压下的超快动力学。目标是使用超快激光技术，皮秒和飞秒激光，解决和研究从孤立分子到凝聚相极限的转变所涉及的动力学的重要特征。对高压下微观大团簇和系统的研究提供了独特的机会，可以在基本水平上测试尺寸、密度和距离受控条件下的分子相互作用。这些研究将涵盖基本和复杂的分子系统。 ***