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

摘要CTS-0089875 J。L.安德森，卡内基梅隆大学电泳沉积是带电胶体颗粒被施加的电场驱动向电极表面并沉积在那里的过程。在某些条件下，颗粒在沉积到固定的表面位置之前仍然是移动的和自组装的。根据胶体、电极以及施加的电场，该方法有多种理想的应用;特别是，对于直流电和交流电，所获得的结果完全不同。本文的目的是首先对现有的理论模型（如电流体动力学、电动力学）及其局限性进行评价。然后，它是发展一个理论，并进行实验，这将包括所有方面的自有序聚集的交流情况下（例如布朗运动，电动力学，胶体力）。 具体而言，预期将大大提高精度，高于在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.