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AC Electric-Field-Induced Fluid Flow in Microelectrodes

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.
0021-9797
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
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).

Record type: Article

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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More information

Published date: 15 September 1999
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 372372
URI: https://eprints.soton.ac.uk/id/eprint/372372
ISSN: 0021-9797
PURE UUID: 2f96ca74-342a-401c-9712-1e4bb8e5aa88
ORCID for Hywel Morgan: ORCID iD orcid.org/0000-0003-4850-5676
ORCID for Nicolas G Green: ORCID iD orcid.org/0000-0001-9230-4455

Catalogue record

Date deposited: 01 Dec 2014 17:46
Last modified: 29 Aug 2019 00:44

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Contributors

Author: Antonio Ramos
Author: Hywel Morgan ORCID iD
Author: Nicolas G Green ORCID iD
Author: Antonio Castellanos

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