Ramos A, Morgan H, Green NG, Castellanos A
Departamento de Electronica y Electromagnetismo, Universidad de Sevilla, Avda. Reina Mercedes, s/n, Sevilla, 41012, Spain
J Colloid Interface Sci. 1999 Sep 15;217(2):420-422. doi: 10.1006/jcis.1999.6346.
During the AC electrokinetic manipulation of particles in suspension on microelectrode structures, strong frequency-dependent fluid flow is observed. The fluid movement is predominant at frequencies below the reciprocal charge relaxation time, with a reproducible pattern occurring close to and across the electrode surface. This paper reports measurements of the fluid velocity as a function of frequency and position across the electrode. Evidence is presented indicating that the flow occurs due to electroosmotic stress arising from the interaction of the electric field and the electrical double layer on the electrodes. The electrode polarization plays a significant role in controlling the frequency dependence of the flow. Copyright 1999 Academic Press.
在微电极结构上对悬浮颗粒进行交流电动操控期间，观察到强烈的频率依赖性流体流动。在低于电荷弛豫时间倒数的频率下，流体运动占主导，在靠近电极表面及横跨电极表面处会出现可重复的模式。本文报告了流体速度随频率和横跨电极位置变化的测量结果。有证据表明，流动是由于电极上电场与双电层相互作用产生的电渗应力所致。电极极化在控制流动的频率依赖性方面起着重要作用。版权所有1999年，学术出版社。
