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Issue 11, 2006
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Theoretical prediction of fast 3D AC electro-osmotic pumps

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AC electro-osmotic (ACEO) pumps in microfluidics currently involve planar electrode arrays, but recent work on the underlying phenomenon of induced-charge electro-osmosis (ICEO) suggests that three-dimensional (3D) geometries may be exploited to achieve faster flows. In this paper, we present some new design principles for periodic 3D ACEO pumps, such as the “fluid conveyor belt” of ICEO flow over a stepped electrode array. Numerical simulations of these designs (using the standard low-voltage model) predict flow rates almost twenty times faster than existing planar ACEO pumps, for the same applied voltage and minimum feature size. These pumps may enable new portable or implantable lab-on-a-chip devices, since rather fast (mm s−1), tuneable flows should be attainable with battery voltages (<10 V).

Graphical abstract: Theoretical prediction of fast 3D AC electro-osmotic pumps

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Publication details

The article was received on 07 Jun 2006, accepted on 08 Aug 2006 and first published on 04 Sep 2006

Article type: Paper
DOI: 10.1039/B608092H
Citation: Lab Chip, 2006,6, 1455-1461
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    Theoretical prediction of fast 3D AC electro-osmotic pumps

    M. Z. Bazant and Y. Ben, Lab Chip, 2006, 6, 1455
    DOI: 10.1039/B608092H

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