A micropump controlled by EWOD: wetting line energy and velocity effects

    Authors

    R. Shabani;H. J. Cho

    Comments

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    Abbreviated Journal Title

    Lab Chip

    Keywords

    MICROFLUIDICS; Biochemical Research Methods; Chemistry, Multidisciplinary; Nanoscience; & Nanotechnology

    Abstract

    A Laplace pressure gradient between a droplet and a liquid meniscus was utilized to create an on-demand constant flow rate capillary pump. Electrowetting on dielectric was implemented to induce the pressure gradient in the microchannel. For an initial droplet volume of 0.3 mu L and a power of 12 nW a constant flow rate of 0.02 mu L s(-1) was demonstrated. The effects of the wetting line energy on the static contact angle and the wetting line velocity on the dynamic contact angle in the pump operation were studied. Sample loading on-demand could be achieved by regulating an electric potential.

    Journal Title

    Lab on a Chip

    Volume

    11

    Issue/Number

    20

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    3401

    Last Page

    3403

    WOS Identifier

    WOS:000295270100004

    ISSN

    1473-0197

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