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Issue 10, 2004
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An integrated AC electrokinetic pump in a microfluidic loop for fast and tunable flow control

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Abstract

We have built a dedicated lab on a chip to study the performance of an integrated electrokinetic micropump, driven by a low voltage AC signal. This micropump consists of an array of interdigitated electrodes and is here integrated in a microfluidic loop. We demonstrate that this device can pump continuously and reproducibly electrolyte solutions of low to moderate ionic strength. The pumping speed reaches up to 500 µm s−1 in 20 µm deep and 100 µm wide channels with a driving signal in the 1–10 kHz range and an amplitude of only a few volts. In addition, we have observed an interesting reversal of the pumping direction at higher frequencies (50–100 kHz). Our device permits a systematic and automated exploration of the influence of the ionic strength thanks to an integrated micromixer.

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Publication details

The article was received on 19 Apr 2004, accepted on 15 Jul 2004 and first published on 09 Aug 2004


Article type: Paper
DOI: 10.1039/B408382M
Citation: Analyst, 2004,129, 944-949
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    An integrated AC electrokinetic pump in a microfluidic loop for fast and tunable flow control

    V. Studer, A. Pépin, Y. Chen and A. Ajdari, Analyst, 2004, 129, 944
    DOI: 10.1039/B408382M

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