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The role of electrohydrodynamic forces in the dielectrophoretic manipulation and separation of particles

The role of electrohydrodynamic forces in the dielectrophoretic manipulation and separation of particles
The role of electrohydrodynamic forces in the dielectrophoretic manipulation and separation of particles
A dielectric particle suspended in a dielectric medium polarises under the influence of an electric field. If the field is non-uniform, the particle experiences a directional force and the resulting movement is referred to as dielectrophoresis. The high electric fields can also cause fluid motion, which in turn results in a viscous drag force on the particle. This paper outlines the application of dielectrophoresis to the sub-micrometre scale and discusses mechanisms responsible for fluid motion in small electrode structures. Preliminary measurements of fluid velocity in a microelectrode array are presented and are discussed in relation to theoretical models. Finally the relevance of electric field induced fluid motion to particle separation technologies is discussed.
0304-3886
71-81
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) The role of electrohydrodynamic forces in the dielectrophoretic manipulation and separation of particles. Journal of Electrostatics, 47, 71-81. (doi:10.1016/S0304-3886(99)00031-5).

Record type: Article

Abstract

A dielectric particle suspended in a dielectric medium polarises under the influence of an electric field. If the field is non-uniform, the particle experiences a directional force and the resulting movement is referred to as dielectrophoresis. The high electric fields can also cause fluid motion, which in turn results in a viscous drag force on the particle. This paper outlines the application of dielectrophoresis to the sub-micrometre scale and discusses mechanisms responsible for fluid motion in small electrode structures. Preliminary measurements of fluid velocity in a microelectrode array are presented and are discussed in relation to theoretical models. Finally the relevance of electric field induced fluid motion to particle separation technologies is discussed.

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Published date: June 1999
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 372369
URI: https://eprints.soton.ac.uk/id/eprint/372369
ISSN: 0304-3886
PURE UUID: 9d120f23-20d2-49b3-ab1a-66cdefef9fdd
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 17:35
Last modified: 15 Aug 2019 00:45

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