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Dielectrophoretic manipulation and separation of microparticles using curved microelectrodes
journal contribution
posted on 2009-11-01, 00:00 authored by Khashayar Khoshmanesh, C Zhang, F Tovar-Lopez, Saeid Nahavandi, Sara Baratchi, K Kalantar-Zadeh, A MitchellThis paper presents the development and experimental analysis of a dielectrophoresis (DEP) system, which is used for the manipulation and separation of microparticles in liquid flow. The system is composed of arrays of microelectrodes integrated to a microchannel. Novel curved microelectrodes are symmetrically placed with respect to the centre of the microchannel with a minimum gap of 40 mm. Computational fluid dynamics method is utilised to characterise the DEP field and predict the dynamics of particles. The performance of the system is assessed with microspheres of 1, 5 and 12 mm diameters. When a high-frequency potential is applied to microelectrodes a spatially varying electric field is induced in the microchannel, which creates the DEP force. Negative-DEP behaviour is observed with particles being repelled from the microelectrodes. The particles of different dimensions experience different DEP forces and thus settle to separate equilibrium zones across the microchannel. Experiments demonstrate the capability of the system as a field flow fraction tool for sorting microparticles according to their dimensions and dielectric properties.
History
Journal
ElectrophoresisVolume
30Issue
21Pagination
3707 - 3717Publisher
Wiley - V C H Verlag GmbH & Co. KGaALocation
Weinheim, GermanyPublisher DOI
ISSN
0173-0835eISSN
1522-2683Language
engNotes
Published Online: Oct 6 2009 9:16AMPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2009, WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimUsage metrics
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