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3-D electrode designs for flow-through dielectrophoretic systems

Author(s)
Park, BYMadou, Mark
Issued Date
2005-10
DOI
10.1002/elps.200500138
URI
https://scholarworks.unist.ac.kr/handle/201301/5756
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=27244457340
Citation
ELECTROPHORESIS, v.26, no.19, pp.3745 - 3757
Abstract
Traditional methods of dielectrophoretic separation using planar microelectrodes have a common problem: the dielectrophoretic force, which is proportional to ∇ E 2, rapidly decays as the distance from the electrodes increases. Recent advances in carbon microelectromechanical systems have allowed researchers to create carbon 3-D structures with relative ease. These developments have opened up new possibilities in the fabrication of complex 3-D shapes. In this paper, the use of 3-D electrode designs for high-throughput dielectrophoretic separation/concentration/filtration systems is investigated. 3-D electrode designs are beneficial because (i) they provide a method of extending the electric field within the fluid. (ii) The 3-D electrodes can be designed so that the velocity field coincides with the electric field distribution. (iii) Novel electrode designs, not based on planar electrodes designs, can be developed and used. The electric field distribution and velocity fields of 3-D electrode designs that are simple extensions of 2-D designs are presented, and two novel electrode designs that are not based on 2-D electrode designs are introduced. Finally, a proof-of-concept experimental device for extraction of nanofibrous carbon from canola oil is demonstrated.
Publisher
WILEY-BLACKWELL
ISSN
0173-0835
Keyword (Author)
3-D electrode designdielectrophoresisflow-through
Keyword
MICROELECTROMECHANICAL SYSTEMSELECTROCHEMICAL APPLICATIONSCARBON NANOTUBESSEPARATIONCELLSPHOTORESISTSUSPENSIONSFILTRATIONBACTERIAFIELDS

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