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Issue 7, 2013
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Rapid generation and manipulation of microfluidic vortex flows induced by AC electrokinetics with optical illumination

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Abstract

We demonstrate a rapid generation of twin opposing microvortices (TOMVs) induced by non-uniform alternating current (AC) electric fields together with a laser beam on a patterned pair of indium tin oxide (ITO) electrodes. A fast and strong jet flow region between twin microvortices is also generated. Its pattern and direction, such as whether it is symmetric or asymmetric, are controlled mainly by the location of a single laser spot relative to the ITO electrodes. With two laser beams, two separate flows are superposed to give a new one. In situ generation and control of the TOMV flow are tested in suspensions of fluorescent polystyrene particles, as well as in milk emulsions. This technique has great potential for dynamically manipulating micro-fluid flows, functioning as a micro-pump or mixer.

Graphical abstract: Rapid generation and manipulation of microfluidic vortex flows induced by AC electrokinetics with optical illumination

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Publication details

The article was received on 08 Sep 2012, accepted on 21 Jan 2013, published on 21 Jan 2013 and first published online on 21 Jan 2013


Article type: Paper
DOI: 10.1039/C3LC41021H
Citation: Lab Chip, 2013,13, 1289-1294
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    Rapid generation and manipulation of microfluidic vortex flows induced by AC electrokinetics with optical illumination

    C. Park and S. T. Wereley, Lab Chip, 2013, 13, 1289
    DOI: 10.1039/C3LC41021H

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