Vapor Phase Nucleation, The Consistent Molecular Cluster, Theory and Associated Experiments

气相成核、一致分子簇、理论和相关实验

• 批准号: 9022215
• 负责人: Howard Reiss
• 金额: $ 37.65万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9022215&HistoricalAwards=false
• 关键词: Vapor; Phase; Nucleation; Consistent; Molecular

Professor Reiss is supported by a grant from the Experimental Physical Chemistry Program for the experimental and theoretical investigation of nucleation, the process by which an aggregate of molecules too small to be observed becomes the nucleus upon which other molecules condense in the vapor phase, which leads eventually to the formation of a liquid droplet. The experiments are carried out in a cloud chamber, and the goal is the understanding at the molecular level of the physical cluster itself and the physical process by which it is formed. The theoretical and experimental studies in this research involve a molecular theory of vapor phase nucleation, capable of quantitative prediction of critical supersaturation for homogeneous nucleation in single and multicomponent systems under conditions of practical interest. Studies of vapor phase nucleation of vinyl polymers will be based on the same theory. The theory involves the identification of the physical cluster consistent with the physical process of nucleation and the analysis of that cluster with Monte Carlo simulation.

Reiss教授获得了实验物理化学项目的资助，从事成核的实验和理论研究。成核是指一群太小而无法观察到的分子聚集成核的过程，其他分子在此基础上形成气相，最终形成液滴。实验是在云室中进行的，目标是在分子水平上理解物理团簇本身及其形成的物理过程。本研究的理论和实验研究涉及气相成核的分子理论，能够定量预测在实际兴趣条件下单组分和多组分系统均匀成核的临界过饱和度。乙烯基聚合物气相成核的研究将基于同样的理论。该理论包括识别与成核物理过程相一致的物理团簇，并用蒙特卡罗模拟对该团簇进行分析。