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Issue 4, 2004
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An AC electroosmotic micropump for circular chromatographic applications

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Flow rates of up to 50 µm s−1 have been successfully achieved in a closed-loop channel using an AC electroosmotic pump. The AC electroosmotic pump is made of an interdigitated array of unequal width electrodes located at the bottom of a channel, with an AC voltage applied between the small and the large electrodes. The flow rate was found to increase linearly with the applied voltage and to decrease linearly with the applied frequency. The pump is expected to be suitable for circular chromatography for the following reasons: the driving forces are distributed over the channel length and the pumping direction is set by the direction of the interdigitated electrodes. Pumping in a closed-loop channel can be achieved by arranging the electrode pattern in a circle. In addition the inherent working principle of AC electroosmotic pumping enables the independent optimisation of the channel height or the flow velocity.

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Publication details

The article was received on 05 Nov 2003, accepted on 12 Feb 2004 and first published on 25 Mar 2004

Article type: Paper
DOI: 10.1039/B314123C
Citation: Lab Chip, 2004,4, 396-400
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    An AC electroosmotic micropump for circular chromatographic applications

    S. Debesset, C. J. Hayden, C. Dalton, J. C. T. Eijkel and A. Manz, Lab Chip, 2004, 4, 396
    DOI: 10.1039/B314123C

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