Nonlinear Electrophoresis of Colloids Controlled by Anisotropic Conductivity and Permittivity of Liquid-Crystalline Electrolyte

Sathyanarayana Paladugu, Christopher Conklin, Jorge Viñals, Oleg D. Lavrentovich

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4 Scopus citations

Abstract

Liquid-crystal electrolytes enable nonlinear electrophoresis of colloidal particles with velocities proportional to the square of the applied field. We demonstrate that the magnitude and even the polarity of electrophoretic mobility can be controlled by the anisotropic electric conductivity and dielectric permittivity of the liquid crystal. In particular, the reversal of electrophoretic mobility can be triggered either by temperature or composition changes that alter the signs of the conductivity and permittivity anisotropies. Controllable reversal of mobility adds to the list of advantages of anisotropic electrolytes over their isotropic counterparts.

Original languageEnglish (US)
Article number034033
JournalPhysical Review Applied
Volume7
Issue number3
DOIs
StatePublished - Mar 30 2017

Bibliographical note

Funding Information:
The work is supported by National Science Foundation Grants No. DMS-1434185 (experiments on electrokinetics), No. DMS-1435372 and the Minnesota Supercomputing Institute (numerical simulations), as well as Grant No. DMR-1410378 (determination of material parameters).

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