Volume 74, Number 4, May 2006
|Page(s)||623 - 629|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||12 April 2006|
Control of electrostatic particle-particle interactions in dielectrophoresis
Department of Mechanical Engineering, New Jersey Institute of Technology University Heights, Newark, NJ 07102, USA
Accepted: 16 March 2006
In a nonuniform electric field, the particles of a suspension experience both a dielectrophoretic (DEP) force and electrostatic particle-particle forces. In applications which require that the particles be manipulated individually the latter forces are not desirable. It is shown numerically that the ratio of the particle-particle and DEP forces decreases with increasing particle size and increasing gap between the particles, and its variation with the Clausius-Mossotti factor becomes increasingly nonlinear with decreasing particle size.
PACS: 41.20.Cv – Electrostatics; Poisson and Laplace equations, boundary-value problems / 47.61.Fg – Flows in micro-electromechanical systems (MEMS) and nano-electromechanical systems (NEMS)
© EDP Sciences, 2006
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