Hindered Diffusion of Colloidal Particles Very Near to a Wall

非常靠近墙壁的胶体颗粒的扩散受阻

• 批准号: 9003874
• 负责人: Dennis Prieve
• 金额: $ 28.5万
• 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: 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=9003874&HistoricalAwards=false
• 关键词: Hindered; Diffusion; Colloidal; Particles; Very

The objectives of this proposal are (1) to improve the total internal-reflection microscopy (TIMR) to measure absolute distances between a submicron particle and a solid wall, and (2) to study the dynamics of Brownian motion of particles in the vicinity of a solid wall. TIMR technique was initially developed by Dr. Prieve. It measures the interaction potential between a particle and a wall. Interaction forces as small as a few picograms have been experimentally determined with this technique. In this project, TIMR will be applied to study the dynamics of hindered Brownian motion of a sphere and diffusion coefficients near a wall. The results can be related to the rates of flocculation and deposition of particles from moving fluids.

本建议的目标是：（1）提高 内反射显微镜（TIMR）测量绝对 亚微米颗粒与固体壁之间的距离，以及 (2)研究粒子的布朗运动动力学， 实心墙附近。 TIMR技术最初是 由Prieve博士开发。 它测量了 粒子和壁之间的电势。 相互作用力 小到只有几皮克 用这种技术来决定。 在这个项目中，TIMR将 应用于研究受阻布朗运动的动力学， 球和扩散系数近壁。 结果与絮凝率有关， 运动的流体中的颗粒沉积。