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Special Issue, Vol. 3, December 2008, pp.25-36





Fluido-Dynamic and Electromagnetic Characterization of 3D Carbon Dielectrophoresis with Finite Element Analysis


1Rodrigo Martinez-Duarte, 2Salvatore Cito, 3Esther Collado-Arredondo,
3Sergio O. Martinez and 4Marc J. Madou

1,4 Mechanical & Aerospace Engineering Department, University of California,
Irvine, 4200 Engineering Gateway, Irvine, CA, 92697, USA, tel.: +1 (949) 824-4143

2Universitat Rovira i Virgili, Tarragona, Spain

3Departamento de Ingeniería Eléctrica y Computación, Tecnológico de Monterrey,
Campus Monterrey, Monterrey, Mexico

E-mail: 1drmartnz@gmail.com, 4mmadou@uci.edu, 2salvatore.cito@gmail.com, 3smart@itesm.mx



Received: 31 October 2008   /Accepted: 7 November 2008   /Published: 8 December 2008


Abstract: The following work presents the fluido-dynamic and electromagnetic characterization of an array of 3D electrodes to be used in high throughput and high efficiency Carbon Dielectrophoresis (CarbonDEP) applications such as filters, continuous particle enrichment and positioning of particle populations for analysis. CarbonDEP refers to the induction of Dielectrophoresis (DEP) by carbon surfaces. The final goal is, through an initial stage of modeling and analysis, to reduce idea-to-prototype time and cost of CarbonDEP devices to be applied in the health care field. Finite Element Analysis (FEA) is successfully conducted to model flow velocity and electric fields established by polarized high aspect ratio carbon cylinders, and its planar carbon connecting leads, immersed in a water-based medium. Results demonstrate correlation between a decreasing flow velocity gradient and an increasing electric field gradient toward electrodes’ surfaces which is optimal for selected CarbonDEP applications. Simulation results are experimentally validated in the proposed applications.


Keywords: Carbon, Dielectrophoresis, C-mems, High flow rate, Simulation


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