Dielectrophoretic choking phenomenon in a converging-diverging microchannel.

Biomicrofluidics
Ye AiSang W Joo

Abstract

Experiments show that particles smaller than the throat size of converging-diverging microchannels can sometimes be trapped near the throat. This critical phenomenon is associated with the negative dc dielectrophoresis arising from nonuniform electric fields in the microchannels. A finite-element model, accounting for the particle-fluid-electric field interactions, is employed to investigate the conditions for this dielectrophoretic (DEP) choking in a converging-diverging microchannel for the first time. It is shown quantitatively that the DEP choking occurs for high nonuniformity of electric fields, high ratio of particle size to throat size, and high ratio of particle's zeta potential to that of microchannel.

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Citations

Oct 23, 2010·Analytical and Bioanalytical Chemistry·Soumya K SrivastavaAdrienne R Minerick
Jan 11, 2014·Journal of Colloid and Interface Science·Ye AiShizhi Qian
Jan 10, 2014·Biomicrofluidics·Teng ZhouGeng Liu
Nov 4, 2010·Biomicrofluidics·Kunwar Pal Singh, Manoj Kumar
Sep 27, 2012·The Journal of Physical Chemistry. B·Jyh-Ping HsuShiojenn Tseng
Feb 6, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Shiojenn TsengLi-Hsien Yeh
Jan 14, 2011·Physical Chemistry Chemical Physics : PCCP·Ye Ai, Shizhi Qian
Apr 20, 2010·Journal of Colloid and Interface Science·Litao LiangXiangchun Xuan
Mar 26, 2010·Journal of Colloid and Interface Science·Ye Ai, Shizhi Qian
Oct 15, 2010·Electrophoresis·Sinan E YalcinOktay Baysal
Aug 9, 2011·Electrophoresis·Noah G WeissMark A Hayes
Oct 12, 2010·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Sang W JooShizhi Qian
Apr 25, 2012·Electrophoresis·Junjie ZhuXiangchun Xuan
May 29, 2013·Colloids and Surfaces. B, Biointerfaces·Zhenyu WangShizhi Qian
Sep 1, 2011·Electrophoresis·Jan RegtmeierDario Anselmetti
Jun 13, 2013·Physical Chemistry Chemical Physics : PCCP·Shiojenn TsengLi-Hsien Yeh
Sep 20, 2016·Micromachines·Teng ZhouSang Woo Joo
Nov 17, 2020·Electrophoresis·Benjamin SarnoStuart D Ibsen
Apr 2, 2021·Analytical Chemistry·Amirreza MalekanfardXiangchun Xuan
Apr 20, 2021·ACS Biomaterials Science & Engineering·Elyahb A KwizeraXiaoming He
Sep 2, 2010·Analytical Chemistry·Ye AiShizhi Qian

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Methods Mentioned

BETA
electrophoresis

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