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Electrokinetic pump having capacitive electrodes

  • US 7,875,159 B2
  • Filed: 03/09/2007
  • Issued: 01/25/2011
  • Est. Priority Date: 10/18/2002
  • Status: Expired due to Fees
First Claim
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1. A method of moving a liquid using an electrokinetic device comprising a pair of electrodes capable of having a voltage drop therebetween and a porous dielectric material between the electrodes, wherein the electrodes are comprised of a material having a capacitance of at least 10

  • 4 Farads per square centimeter, comprising the steps of;

    (a) applying a positive current to the electrodes to charge the capacitance of the electrodes and to move the liquid through the porous dielectric material in a first direction;

    (b) reversing the current applied to the electrodes prior to reaching a threshold voltage for a Faradaic process in the liquid; and

    (c) applying a negative current to the electrodes to move the liquid through the porous dielectric material in a second direction that is opposite to the first direction.

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