A numerical analysis of forces imposed on particles in conventional dielectrophoresis in microchannels with interdigitated electrodes

被引：57
作者：
Cao, Jun [1 ]
Cheng, Ping [1 ]
Hong, Fangjun [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China
来源：
JOURNAL OF ELECTROSTATICS | 2008年 / 66卷 / 11-12期
基金：
中国国家自然科学基金;
关键词：
Microfluidic chip; Conventional dielectrophoresis (cDEP); Particles; Force analysis;
D O I：
10.1016/j.elstat.2008.09.003
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper analyzes the forces, including the Stokes drag force induced by the electrothermal flow, imposed on the particles in conventional dielectrophoresis in microchannels with interdigitated electrodes through a two-dimensional mathematical model. The conditions for the positive and negative dielectrophoresis are revealed. The electrical field, the magnitude of the negative dielectrophoretic force and Stokes drag force are presented. The levitation heights for particles at different horizontal positions with and without considering the Stokes drag force are compared, and the effect of the particle radius for the levitation height is also analyzed. (C) 2008 Published by Elsevier B.V.
引用
收藏
页码：620 / 626
页数：7
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