A new electrolyte AC micro-pump and mixer design based on Faradaic reaction polarization is investigated. The non-uniform AC electric field generated by electrode reaction polarizes the electrode surface, exerts a net electric force on the polarized layer and drives a net AC electro-osmotic flow of the electrolyte on the planar microelectrodes. At large electric potentials (>10V) and frequencies of 100 kHz to 1MHz, the flow direction is shown to be opposite to (previously reported) AC pumps due to capacitive charging. Moreover, the velocity has an exponential dependence on the applied electric potential due to the reaction and is hence an order of magnitude higher than the velocity driven by capacitive charging, which has a quadratic dependence. Theoretical analyses demonstrating the possibility of this Faradaic mechanism and some preliminary experimental results are presented.
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ASME 2004 2nd International Conference on Microchannels and Minichannels
June 17–19, 2004
Rochester, New York, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4164-2
PROCEEDINGS PAPER
Faradaic AC Micro-Pumps and Mixers With Orthogonal Electrodes Available to Purchase
Yuxing Ben,
Yuxing Ben
University of Notre Dame, Notre Dame, IN
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Dmitri Lastochkin,
Dmitri Lastochkin
University of Notre Dame, Notre Dame, IN
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Hsueh-Chia Chang
Hsueh-Chia Chang
University of Notre Dame, Notre Dame, IN
Search for other works by this author on:
Yuxing Ben
University of Notre Dame, Notre Dame, IN
Dmitri Lastochkin
University of Notre Dame, Notre Dame, IN
Hsueh-Chia Chang
University of Notre Dame, Notre Dame, IN
Paper No:
ICMM2004-2414, pp. 795-801; 7 pages
Published Online:
December 2, 2008
Citation
Ben, Y, Lastochkin, D, & Chang, H. "Faradaic AC Micro-Pumps and Mixers With Orthogonal Electrodes." Proceedings of the ASME 2004 2nd International Conference on Microchannels and Minichannels. ASME 2nd International Conference on Microchannels and Minichannels. Rochester, New York, USA. June 17–19, 2004. pp. 795-801. ASME. https://doi.org/10.1115/ICMM2004-2414
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