Effect of Brownian Motion on the Interaction of Polymer- Coated Microspheres

布朗运动对聚合物包覆微球相互作用的影响

• 批准号: 9204061
• 负责人: Dennis Prieve
• 金额: $ 26万
• 依托单位: Carnegie-Mellon 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 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9204061&HistoricalAwards=false
• 关键词: Effect; Brownian; Motion; Interaction; Polymer

Total internal-reflection microscopy (TIMR) is a technique developed by the P.I. and his co-authors to measure absolute distances between a submicron particle and a solid wall, the potential energy profiles and diffusion coefficients. An improvement of TIMR performance is proposed by exerting radiation pressure on the microsphere in order to expand the area of application as well as the method efficiency. The TIRM will be used to study the motion and corresponding forces (steric repulsion, bridging forces) of a single polymer coated microsphere in the proximity of a wall. The proposed techniques complements the surface force measurement approach in a specific range of application for colloidal dispersions. This project aims to an improved TIMR technique, which would allow to study fundamental interaction mechanisms and stability problems in colloidal systems.

全内反射显微镜(TIMR)是由P.I.和他的合作者发展起来的一种技术，用于测量亚微米粒子与固体壁之间的绝对距离、势能分布和扩散系数。为了扩大应用范围和提高方法效率，提出了通过在微球上施加辐射压力来提高TIMR性能的方法。TIRM将被用来研究单个聚合物涂层微球在壁面附近的运动和相应的力(空间斥力、桥接力)。所提出的技术在胶体分散的特定应用范围内补充了表面力测量方法。本项目旨在改进TIMR技术，使其能够研究胶体体系中的基本相互作用机制和稳定性问题。