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Electric field induced fluid flow on microelectrodes: the effect of illumination

Electric field induced fluid flow on microelectrodes: the effect of illumination
Electric field induced fluid flow on microelectrodes: the effect of illumination
The electrokinetic manipulation of particles suspended in a fluid medium is accomplished using microelectrodes that generate non-uniform fields of significant strength from low applied potentials. The high strength fields produce not only forces on the particles but also on the fluid medium used for suspension. This paper presents qualitative and semi-quantitative observations of the movement of the fluid at applied field frequencies of the order of 1MHz and higher. The importance of the illumination in generating the fluid flow is described, the flow depending on both the intensity of illumination and the applied electric field. The theory of electrothermally induced fluid flow is briefly described and compared with the experimental observations. Reasonable agreement is found between the experiments and the theory, with the light generating temperature gradients, and therefore gradients in fluid permittivity and conductivity, and the electric field responsible for the motive force.
0022-3727
L13-L17
Green, Nicolas G
d9b47269-c426-41fd-a41d-5f4579faa581
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
González, Antonio
3121380d-cafa-4347-8a10-51491d5ed0ca
Castellanos, A.
afb6750a-322b-4898-b3e2-beff8ae96b4d
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Green, Nicolas G
d9b47269-c426-41fd-a41d-5f4579faa581
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
González, Antonio
3121380d-cafa-4347-8a10-51491d5ed0ca
Castellanos, A.
afb6750a-322b-4898-b3e2-beff8ae96b4d
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174

Green, Nicolas G, Ramos, Antonio, González, Antonio, Castellanos, A. and Morgan, Hywel (2000) Electric field induced fluid flow on microelectrodes: the effect of illumination. Journal of Physics D: Applied Physics, 33 (2), L13-L17. (doi:10.1088/0022-3727/33/2/102).

Record type: Article

Abstract

The electrokinetic manipulation of particles suspended in a fluid medium is accomplished using microelectrodes that generate non-uniform fields of significant strength from low applied potentials. The high strength fields produce not only forces on the particles but also on the fluid medium used for suspension. This paper presents qualitative and semi-quantitative observations of the movement of the fluid at applied field frequencies of the order of 1MHz and higher. The importance of the illumination in generating the fluid flow is described, the flow depending on both the intensity of illumination and the applied electric field. The theory of electrothermally induced fluid flow is briefly described and compared with the experimental observations. Reasonable agreement is found between the experiments and the theory, with the light generating temperature gradients, and therefore gradients in fluid permittivity and conductivity, and the electric field responsible for the motive force.

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J12_Green_Ramos_Gonzalez_Castellanos_Morgan_J_Physics_D_Applied_Physics_2000.pdf - Other
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More information

Published date: 21 January 2000
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 356170
URI: https://eprints.soton.ac.uk/id/eprint/356170
ISSN: 0022-3727
PURE UUID: b14e9714-12f3-41f8-bb7a-e8611b67c42e
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

Catalogue record

Date deposited: 22 Nov 2013 14:02
Last modified: 06 Jun 2018 12:45

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