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AC electrokinetics of conducting microparticles: a review

AC electrokinetics of conducting microparticles: a review
AC electrokinetics of conducting microparticles: a review
This paper reviews both theory and experimental observation of the AC electrokinetic properties of conducting microparticles suspended in an aqueous electrolyte. Applied AC electric fields interact with the induced charge in the electrical double layer at the metal particle–electrolyte interface. In general, particle motion is governed by both the electric field interacting with the induced dipole on the particle and also the induced-charge electro-osmotic (ICEO) flow around the particle. The importance of the RC time for charging the double layer is highlighted. Experimental measurements of the AC electrokinetic behaviour of conducting particles (dielectrophoresis, electro-rotation and electro-orientation) are compared with theory, providing a comprehensive review of the relative importance of particle motion due to forces on the induced dipole compared with motion arising from induced-charge electro-osmotic flow. In addition, the electric-field driven assembly of conducting particles is reviewed in relation to their AC electrokinetic properties and behaviour.
1359-0294
79-90
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
Garcia-Sanchez, Pablo
9f2b8e4f-0c15-4cff-9f3b-91ce213c4ca5
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
Garcia-Sanchez, Pablo
9f2b8e4f-0c15-4cff-9f3b-91ce213c4ca5
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174

Ramos, Antonio, Garcia-Sanchez, Pablo and Morgan, Hywel (2016) AC electrokinetics of conducting microparticles: a review. Current Opinion in Colloid & Interface Science, 24, 79-90. (doi:10.1016/j.cocis.2016.06.018).

Record type: Article

Abstract

This paper reviews both theory and experimental observation of the AC electrokinetic properties of conducting microparticles suspended in an aqueous electrolyte. Applied AC electric fields interact with the induced charge in the electrical double layer at the metal particle–electrolyte interface. In general, particle motion is governed by both the electric field interacting with the induced dipole on the particle and also the induced-charge electro-osmotic (ICEO) flow around the particle. The importance of the RC time for charging the double layer is highlighted. Experimental measurements of the AC electrokinetic behaviour of conducting particles (dielectrophoresis, electro-rotation and electro-orientation) are compared with theory, providing a comprehensive review of the relative importance of particle motion due to forces on the induced dipole compared with motion arising from induced-charge electro-osmotic flow. In addition, the electric-field driven assembly of conducting particles is reviewed in relation to their AC electrokinetic properties and behaviour.

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Accepted/In Press date: 29 June 2016
e-pub ahead of print date: 12 July 2016
Published date: August 2016
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 399121
URI: https://eprints.soton.ac.uk/id/eprint/399121
ISSN: 1359-0294
PURE UUID: d68ed314-54da-4375-a467-c90ff5ddbb5a
ORCID for Hywel Morgan: ORCID iD orcid.org/0000-0003-4850-5676

Catalogue record

Date deposited: 05 Aug 2016 10:30
Last modified: 17 Sep 2019 05:17

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