Effect of Alternating Current on the Dynamics of Colloidal Particles Near Electrodes

摘要CTS-0089875J。电沉积是指带电的胶体粒子在外加电场的作用下向电极表面移动并沉积在电极表面的过程。在某些条件下，粒子在沉积到固定的表面位置之前仍然是可移动的和自组装的。根据胶体、电极和外加电场的不同，这一过程有各种理想的应用；特别是对于直流电和交流电，所获得的结果是完全不同的。这项建议的目标是首先评估目前可用的理论模型(如电流体动力学、电动力学)及其局限性。然后是发展一种理论并进行实验，该实验将包括交流情况下自有序聚集的所有方面(例如布朗运动、电动势、胶体力)。具体地说，预计将大大提高精度，远远超过其他地方使用层平均建模所获得的精度。

AbstractCTS-0089875J. L. Anderson, Carnegie Mellon UniversityElectrophoretic deposition is the procress where charged colloid particles are driven by an appliedelectrical field towards the surface of an electrode and deposited there. Under certain conditions, the particles will still be mobile and self assemble before being depositedat a fixed surface location. There is a variety of desirable applications for this procedure, depending on the colloids, the electrodes and also the applied electrical field; in particular, the results obtained differ radically for direct currents and for alternating ones. The goal of this proposal is first to assess the currentlyavailable theoretical models (e.g. electrohydrodynamic, electrokinetic) and their limitaions. It is then to develop a theory and perform experiments which would include all the aspects of self-ordered aggregation for the alternating current case (e.g. Brownian motion, electrokinetice, colloid forces). Specifically, the expected to increase accuracy substantially above what has been obtained elsewhere with layer-averaged modeling.