Wall-induced lateral migration in particle electrophoresis through a rectangular microchannel

Title
Wall-induced lateral migration in particle electrophoresis through a rectangular microchannel
Author(s)
스즈첸Litao Liang[Litao Liang]Ye Ai[Ye Ai]Junjie Zhu[Junjie Zhu]Xiangchun Xuan[Xiangchun Xuan]
Keywords
MICROFLUIDIC FLOW-CYTOMETRY; ZETA-POTENTIAL DISTRIBUTION; SPHERICAL-PARTICLE; CYLINDRICAL PORE; COLLOIDAL SPHERE; DIELECTROPHORETIC FORCE; ELECTROOSMOTIC FLOW; DOUBLE-LAYER; MOTION; SEPARATION
Issue Date
201003
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.347, no.1, pp.142 - 146
Abstract
The fundamental study of particle electrophoresis in microchannels is relevant to many applications. It has long been accepted that particles move parallel to the applied electric field in a straight uniform microchannel. This paper presents the first experimental demonstration of lateral particle migration in electrophoresis through a rectangular microchannel. This wall-induced dielectrophoresis-resembled motion is driven by the electrical force arising from the non-uniform electric field around the particle. It decays rapidly when the particle is away from the channel wall, and vanishes in the center of the channel. The observed result is a focused particle stream flowing along the channel centerline. The measured widths of the particle stream at various electric fields agree reasonably with the predictions of an approximate analytical model. (C) 2010 Elsevier Inc. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/22769http://dx.doi.org/10.1016/j.jcis.2010.03.039
ISSN
0021-9797
Appears in Collections:
공과대학 > 기계공학부 > Articles
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