Numerical simulation on the opto-electro-kinetic patterning for rapid concentration of particles in a microchannel

Dong Kim, Jaesool Shim, Han Sheng Chuang, Kyung Chun Kim

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

This paper presents a mathematical model for laser-induced rapid electro-kinetic patterning (REP) to elucidate the mechanism for concentrating particles in a microchannel non-destructively and non-invasively. COMSOLV® (v4.2a) multiphysics software was used to examine the effect of a variety of parameters on the focusing performance of the REP. A mathematical model of the REP was developed based on the AC electrothermal flow (ACET) equations, the dielectrophoresis (DEP) equation, the energy balance equation, the Navier-Stokes equation, and the concentration-distribution equation. The medium was assumed to be a diluted solute, and different electric potentials and laser illumination were applied to the desired place. Gold (Au) electrodes were used at the top and bottom of a microchannel. For model validation, the simulation results were compared with the experimental data. The results revealed the formation of a toroidal microvortex via the ACET effect, which was generated due to laser illumination and joule-heating in the area of interest. In addition, under some conditions, such as the frequency of AC, the DEP velocity, and the particle size, the ACET force enhances and compresses resulting in the concentration of particles. The conditions of the DEP velocity and the ACET velocity are presented in detail with a comparison of the experimental results.

原文English
文章編號034102
期刊Biomicrofluidics
9
發行號3
DOIs
出版狀態Published - 2015 5月

All Science Journal Classification (ASJC) codes

  • 生物醫學工程
  • 一般材料科學
  • 凝聚態物理學
  • 流體流動和轉移過程
  • 膠體和表面化學

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