Control of electrostatic particle-particle interactions in dielectrophoresisN. Aubry and P. Singh
Department of Mechanical Engineering, New Jersey Institute of Technology University Heights, Newark, NJ 07102, USA
received 27 June 2005; accepted in final form 16 March 2006
published online 12 April 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.
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).
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