Dielectrophoretic manipulation and separation of microparticles using curved microelectrodes

Khoshmanesh, Khashayar, Zhang, Chen, Tovar-Lopez, Francisco J., Nahavandi, Saeid, Baratchi, Sara, Kalantar-Zadeh, Kourosh and Mitchell, Arnan 2009, Dielectrophoretic manipulation and separation of microparticles using curved microelectrodes, Electrophoresis, vol. 30, no. 21, pp. 3707-3717, doi: 10.1002/elps.200900079.

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Title Dielectrophoretic manipulation and separation of microparticles using curved microelectrodes
Author(s) Khoshmanesh, Khashayar
Zhang, Chen
Tovar-Lopez, Francisco J.
Nahavandi, SaeidORCID iD for Nahavandi, Saeid orcid.org/0000-0002-0360-5270
Baratchi, Sara
Kalantar-Zadeh, Kourosh
Mitchell, Arnan
Journal name Electrophoresis
Volume number 30
Issue number 21
Start page 3707
End page 3717
Total pages 11
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Place of publication Weinheim, Germany
Publication date 2009-11
ISSN 0173-0835
Keyword(s) Computational fluid dynamics
Field flow fraction
Summary This 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.
Notes Published Online: Oct 6 2009 9:16AM
Language eng
DOI 10.1002/elps.200900079
Field of Research 091306 Microelectromechanical Systems (MEMS)
Socio Economic Objective 861503 Scientific Instruments
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2009, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Persistent URL http://hdl.handle.net/10536/DRO/DU:30029132

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