Push/pull actuation using opto-electrowetting

It is shown theoretically and experimentally that opto-electrowetting may be used for both pulling and pushing liquid droplets. A theoretical analysis based on the Lippmann-equation and an electronic equivalent circuit model allows definition of a voltage and frequency range for which pushing may be...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2008-02, Vol.141 (2), p.499-505
Main Authors: Krogmann, Florian, Qu, Hong, Mönch, Wolfgang, Zappe, Hans
Format: Article
Language:English
Subjects:
Electrowetting
Electrowetting-on-dielectrics
Lab-on-a-chip
Liquid handling
Micro-fluidic device
Opto-electrowetting
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Summary:It is shown theoretically and experimentally that opto-electrowetting may be used for both pulling and pushing liquid droplets. A theoretical analysis based on the Lippmann-equation and an electronic equivalent circuit model allows definition of a voltage and frequency range for which pushing may be achieved, a novelty in electrowetting-based actuation. Experimental confirmation of the effect demonstrates that enhanced flexibility in micro-fluidic actuation may be obtained under appropriate bias conditions.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2007.08.017