An integrated AC electrokinetic pump in a microfluidic loop for fast and tunable flow control
Literature Information
Publication Date
2004-08-09
DOI
10.1039/B408382M
Impact Factor
4.616
Authors
Armand Ajdari
View Original
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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Analyst publishes analytical and bioanalytical research that reports premier fundamental discoveries and inventions, and the applications of those discoveries, unconfined by traditional discipline barriers.
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