DC-Biased AC-Electrokinetic Mixing: A Mechanistic Investigation

Abstract:

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This paper presents an experimental investigation on the DC-biased AC-electrokinetic (ACEK) flow vortex in a rectangular microchannel. This is a new flow phenomenon in AC-electrokinetics and had been successfully utilized for microfluidic mixing as reported in our previous work. The microchannel is aligned parallel to a pair of energized coplanar microelectrodes such that the generated flow vortex is perpendicular to the pressure-driven flowing samples. With the application of a DC bias AC voltage, incipient Faradaic reactions occur above the electrodes and thus producing ions and creating a net dominant flow vortex. Further investigation to understand the generation of the DC-biased ACEK flow was conducted. This is performed by direct visualization of such flow vortex formation from the cross-section of a rectangular microchannel.

Info:

Periodical:

Edited by:

Selin Teo, A. Q. Liu, H. Li and B. Tarik

Pages:

109-112

DOI:

10.4028/www.scientific.net/AMR.74.109

Citation:

W. Y. Ng et al., "DC-Biased AC-Electrokinetic Mixing: A Mechanistic Investigation", Advanced Materials Research, Vol. 74, pp. 109-112, 2009

Online since:

June 2009

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$35.00

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