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Experiments on AC electrokinetic pumping of liquids using arrays of microelectrodes

Experiments on AC electrokinetic pumping of liquids using arrays of microelectrodes
Experiments on AC electrokinetic pumping of liquids using arrays of microelectrodes
Net fluid flow induced by AC potentials applied to arrays of co-planar interdigitated microelectrodes is reported. Two types of microelectrode structures have been employed: arrays of unequal width electrodes subjected to a single AC signal, and arrays of identical electrodes subjected to a traveling-wave potential. A square glass chamber was constructed around the electrode arrays and filled with a concentration of KCl in water of conductivity around 1 mS/m. A map of the fluid velocity as a function of voltage (0-8 Vpp) and frequency (0.1-100 kHz) is presented for the traveling-wave array. In both microstructures, two fluid flow regimes have been observed: at small voltage amplitudes the fluid moves in a certain direction, and at higher voltage amplitudes the fluid flow is reversed. The fluid flow seems to be driven at the level of the electrodes in the two flow regimes. The observations at low voltages are in qualitative accordance with an AC electroosmotic model based upon the Debye-Huckel theory for the double layer.
670-677
Garcia-Sanchez, Pablo
9f2b8e4f-0c15-4cff-9f3b-91ce213c4ca5
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
Green, Nicolas G
d9b47269-c426-41fd-a41d-5f4579faa581
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Garcia-Sanchez, Pablo
9f2b8e4f-0c15-4cff-9f3b-91ce213c4ca5
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
Green, Nicolas G
d9b47269-c426-41fd-a41d-5f4579faa581
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174

Garcia-Sanchez, Pablo, Ramos, Antonio, Green, Nicolas G and Morgan, Hywel (2006) Experiments on AC electrokinetic pumping of liquids using arrays of microelectrodes. IEEE Transactions on Dielectrics & Electrical Insulation, 13 (3), 670-677. (doi:10.1109/TDEI.2006.1657983).

Record type: Article

Abstract

Net fluid flow induced by AC potentials applied to arrays of co-planar interdigitated microelectrodes is reported. Two types of microelectrode structures have been employed: arrays of unequal width electrodes subjected to a single AC signal, and arrays of identical electrodes subjected to a traveling-wave potential. A square glass chamber was constructed around the electrode arrays and filled with a concentration of KCl in water of conductivity around 1 mS/m. A map of the fluid velocity as a function of voltage (0-8 Vpp) and frequency (0.1-100 kHz) is presented for the traveling-wave array. In both microstructures, two fluid flow regimes have been observed: at small voltage amplitudes the fluid moves in a certain direction, and at higher voltage amplitudes the fluid flow is reversed. The fluid flow seems to be driven at the level of the electrodes in the two flow regimes. The observations at low voltages are in qualitative accordance with an AC electroosmotic model based upon the Debye-Huckel theory for the double layer.

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J34_Garcia-Sanchez_Ramos_Green_Morgan_IEEE_Trans_Dielectrics_and_Electrical_2006.pdf - Other
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Published date: June 2006
Organisations: Electronics & Computer Science

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Local EPrints ID: 266501
URI: https://eprints.soton.ac.uk/id/eprint/266501
PURE UUID: a12e7c8c-0fae-4acc-b7f7-f825b221ec00
ORCID for Nicolas G Green: ORCID iD orcid.org/0000-0001-9230-4455
ORCID for Hywel Morgan: ORCID iD orcid.org/0000-0003-4850-5676

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Date deposited: 04 Aug 2008 01:57
Last modified: 17 Sep 2019 00:52

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Contributors

Author: Pablo Garcia-Sanchez
Author: Antonio Ramos
Author: Nicolas G Green ORCID iD
Author: Hywel Morgan ORCID iD

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