Contact Angles, Wetting, and Electrowetting in Crystallizing Colloidal Suspensions and Their Application to Microfluidics

摘要-9985929A。Gast/斯坦福大学本论文将研究胶体晶体和液体悬浮液的重要界面性质。悬浮液的界面行为在诸如油墨、油漆和陶瓷等许多系统中至关重要，其中最终产品取决于润湿或与基底的相互作用。主要目标是了解悬浮液的相行为如何影响其润湿和表面张力特性。这些界面特性将通过电场进行控制，以产生独特且可控的接触角和润湿过程。 这是一个程序，结合胶体和表面科学，统计力学，电动力学和微流体。这项研究的重点是了解胶体相互作用，结构和悬浮液界面现象之间的相互作用。这项工作将被扩展到使用图案化的电极空间调制胶体润湿过程。空间调制的电毛细管行为的胶体悬浮液将利用有趣的和新颖的微流体应用。

ABSTRACTCTS-9985929A. Gast/Stanford UniversityThe important interfacial properties of suspensions of colloidal crystals and liquids will be investigated. The interfacial behavior of suspensions is of central importance in many systems such as inks, paints and ceramics where the final product depends on wetting or interaction with a substrate. The primary goal is to understand how the phase behavior of a suspension influences its wetting and surface tension properties. These interfacial properties will be manipulated via an electric field to produce unique and controllable contact angles and wetting processes. This is a program that combines colloid and surface science, statistical mechanics, electrodynamics and microfluidics. The study focuses on understanding the interplay between colloidal interactions, structure, and suspension interfacial phenomena. The work will be extended to use patterned electrodes to spatially modulate colloidal wetting processes. The spatially modulated electrocapillary behavior of colloidal suspensions will be exploited for interesting and novel microfluidic applications.