alexa Non-vanishing ponderomotive AC electrophoretic effect for particle trapping.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Guan W, Park JH, Krsti PS, Reed MA

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Abstract We present here a study on overlooked aspects of alternating current (AC) electrokinetics-AC electrophoretic (ACEP) phenomena. The dynamics of a particle with both polarizability and net charges in a non-uniform AC electric trapping field is investigated. It is found that either electrophoretic (EP) or dielectrophoretic (DEP) effects can dominate the trapping dynamics, depending on experimental conditions. A dimensionless parameter γ is developed to predict the relative strength of EP and DEP effects in a quadrupole AC field. An ACEP trap is feasible for charged particles in 'salt-free' or low salt concentration solutions. In contrast to DEP traps, an ACEP trap favors the downscaling of the particle size.
This article was published in Nanotechnology and referenced in Journal of Nanomedicine & Nanotechnology

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