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.
71-81
Ramos, Antonio
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Morgan, Hywel
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Green, Nicolas G
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Castellanos, Antonio
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June 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)
The role of electrohydrodynamic forces in the dielectrophoretic manipulation and separation of particles.
Journal of Electrostatics, 47, .
(doi:10.1016/S0304-3886(99)00031-5).
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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J8_Ramos_Morgan_Green_Castellanos_J_Electrostatics_1999.pdf
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Published date: June 1999
Organisations:
Electronics & Computer Science
Identifiers
Local EPrints ID: 372369
URI: http://eprints.soton.ac.uk/id/eprint/372369
ISSN: 0304-3886
PURE UUID: 9d120f23-20d2-49b3-ab1a-66cdefef9fdd
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Date deposited: 01 Dec 2014 17:35
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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