• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>The First International Conference on Electrophoretic Deposition: Fundamentals and Applications; Aug 18-22, 2002; Banff, Alberta, Canada >TWO-PARTICLE DYNAMICS ON ELECTRODES
【24h】

TWO-PARTICLE DYNAMICS ON ELECTRODES

机译：电极上的两粒子动力学

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cooperative motion and clustering of particles that are deposited on electrodes has been observed in dc and ac electric fields. Self-assembly occurs through interactions between particles, and between particles and clusters. With dc fields, electroosmotic fluid flow about each particle convects neighboring particles either toward or away from the particle; the relative velocity between two particles scales as the product ζE where ζ is the zeta potential of the particles and E is the field. Experimental results with dc fields compare very well with the electroosmotic-flow theory. In ac fields, however, the relative motion between two particles is independent of ζ, implying an electrohydrodynamic (E~2) origin to the particle motion. The velocity between two particles depends on the type of electrolyte and on both the magnitude and frequency of the electric field. There are two other striking observations with ac fields. First, the fields required in ac at 100 Hz are about 100 times greater than needed in dc to achieve the same inter-particle velocity; and second, while dc fields drive two particles into essential contact on the electrode, in ac fields the two particles attain a final steady-state gap between them at long times that is about one-half the particle radius. Theories based on fluid convection resulting from electrolyte polarization at the electrode surface can explain some of the experimental ac-field results.
机译：在直流和交流电场中已经观察到沉积在电极上的粒子的协同运动和聚集。自组装是通过粒子之间以及粒子与团簇之间的相互作用而发生的。在直流场的作用下，围绕每个粒子的电渗流体对着或远离粒子对流。两个粒子之间的相对速度与ζE的乘积成比例，其中ζ是粒子的zeta势，E是电场。直流场的实验结果与电渗流理论非常吻合。但是，在交流场中，两个粒子之间的相对运动与ζ无关，这暗示着粒子运动的电流体动力学（E〜2）起源。两个粒子之间的速度取决于电解质的类型以及电场的大小和频率。交流场还有另外两个惊人的发现。首先，为达到相同的粒子间速度，交流电在100 Hz时所需的场强比直流电所需的场大100倍。第二，虽然直流电场将两个粒子驱动到电极上，但在交流电场中，这两个粒子长时间处于最终的稳态间隙，约为粒子半径的一半。基于电极表面电解质极化产生的流体对流的理论可以解释一些实验性交流场结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号