Electroosmotic flow at a liquid-air interface

被引：49

作者：

Lee, Jacky S. H.

Li, Dongqing

机构：

[1] Vanderbilt Univ, Dept Mech Engn, Nashville, TN 37235 USA

[2] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada

来源：

MICROFLUIDICS AND NANOFLUIDICS | 2006年 / 2卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

free surface electroosmotic flow; electroosmotic flow; two-phase flow; electrophoresis;

D O I：

10.1007/s10404-006-0084-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper presents the first experimental evidence on electroosmotic flow at a liquid-air interface. A PDMS microchannel with an opening to air was created to allow for the formation of a liquid-air interface. Polystyrene particles were used to visualize the liquid motion and the experiments found that the particle velocity at the liquid-air interface was significantly slower than the particle velocity in the bulk. This result agrees with a mathematical model that considers the effects of electrical surface charges at the liquid-air interface in electroosmotic flow.

引用

页码：361 / 365

页数：5

共 17 条

[1]

Brask A, 2003, NANOTECH 2003, VOL 1, P190

[2] Entrainment of particles with density between 1.01 and 1.10 g/cm3 in a monobubble Hallimond flotation tube [J].