AC Electric-Field-Induced Fluid Flow in Microelectrodes
AC Electric-Field-Induced Fluid Flow in Microelectrodes
During the AC electrokinetic manipulation of particles in suspension on microelectrode structures, strong frequency-dependent fluid flow is observed. The fluid movement is predominant at frequencies below the reciprocal charge relaxation time, with a reproducible pattern occurring close to and across the electrode surface. This paper reports measurements of the fluid velocity as a function of frequency and position across the electrode. Evidence is presented indicating that the flow occurs due to electroosmotic stress arising from the interaction of the electric field and the electrical double layer on the electrodes. The electrode polarization plays a significant role in controlling the frequency dependence of the flow.
Ramos, Antonio
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Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Green, Nicolas G
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Castellanos, Antonio
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15 September 1999
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Green, Nicolas G
d9b47269-c426-41fd-a41d-5f4579faa581
Castellanos, Antonio
aa989a75-63b0-4f3e-a36b-370545034d7b
Ramos, Antonio, Morgan, Hywel, Green, Nicolas G and Castellanos, Antonio
(1999)
AC Electric-Field-Induced Fluid Flow in Microelectrodes.
Journal of Colloid and Interface Science, 217 (2).
(doi:10.1006/jcis.1999.6346).
Abstract
During the AC electrokinetic manipulation of particles in suspension on microelectrode structures, strong frequency-dependent fluid flow is observed. The fluid movement is predominant at frequencies below the reciprocal charge relaxation time, with a reproducible pattern occurring close to and across the electrode surface. This paper reports measurements of the fluid velocity as a function of frequency and position across the electrode. Evidence is presented indicating that the flow occurs due to electroosmotic stress arising from the interaction of the electric field and the electrical double layer on the electrodes. The electrode polarization plays a significant role in controlling the frequency dependence of the flow.
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J11_Ramos_Morgan_Green_Castellanos_JCIS_1999.pdf
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Published date: 15 September 1999
Organisations:
Electronics & Computer Science
Identifiers
Local EPrints ID: 372372
URI: http://eprints.soton.ac.uk/id/eprint/372372
ISSN: 0021-9797
PURE UUID: 2f96ca74-342a-401c-9712-1e4bb8e5aa88
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Date deposited: 01 Dec 2014 17:46
Last modified: 15 Mar 2024 03:20
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Author:
Antonio Ramos
Author:
Hywel Morgan
Author:
Nicolas G Green
Author:
Antonio Castellanos
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