Computer simulations of charged colloids in alternating electric fields |
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Authors: | Jiajia Zhou Friederike Schmid |
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Institution: | 1. Institut für Physik, Johannes Gutenberg-Universit?t Mainz, 55099, Mainz, Germany
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Abstract: | We briefly review recent theoretical and simulation studies of charged colloidal dispersions in alternating electric fields (AC fields). The response of single colloid to an external field can be characterized by a complex polarizability, which describes the dielectric properties of the colloid and its surrounding electrical double layer. We present computer simulation studies of single spherical colloid, using a coarse-grained mesoscale approach that accounts in full for hydrodynamic and electrostatic interactions as well as for thermal fluctuations. We investigate systematically a number of controlling parameters, such as the amplitude and frequency of the AC-fields. The results are in good agreement with recent theoretical predictions. |
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