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Micro Air Bubble Manipulation by Electrowetting Principle: Transporting, Merging and Eliminating

[+] Author Affiliations
Yuejun Zhao, Sung Kown Cho

University of Pittsburgh, Pittsburgh, PA

Paper No. ICMM2005-75154, pp. 503-509; 7 pages
doi:10.1115/ICMM2005-75154
From:
  • ASME 3rd International Conference on Microchannels and Minichannels
  • ASME 3rd International Conference on Microchannels and Minichannels, Part B cont’d
  • Toronto, Ontario, Canada, June 13–15, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4185-5 | eISBN: 0-7918-3758-0
  • Copyright © 2005 by ASME

abstract

For the first time we report a series of micro air bubble manipulations (transporting, merging and eliminating of air bubbles) in two-dimensional microchannels filled with a water solution. Air bubbles (∼1.2 mm3 in volume) are driven by electrowetting-on-dielectric (EWOD) principle. By sequentially energizing an array of electrodes covered with dielectric layers, micro air bubbles can be transported along a programmed path, merged into a single larger one, and eliminated out of a bulk water solution. These three fundamental micro bubble operations demonstrated will facilitate efficient micro bubble handling essentially required in micro gas analysis systems.

Copyright © 2005 by ASME
Topics: Bubbles

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