Muhammed, Rasi M; Archana, S; Pujala, Ravi Kumar; Dhara, Surajit
arXiv (Cornell University),
04/2022
Paper, Journal Article
We study DC and AC electrophoresis of silica micro and nanorods in a thin film of a nematic liquid crystal. These particles induce virtual topological defects and also demonstrate nontrivial electrophoresis in a nematic liquid crystal. We measure several nonlinear electrophoretic mobility coefficients and compare with those calculated theoretically. We demonstrate a competing effect of the elastic and electrostatic torques that arises due to tilting of the rods with respect to the liquid crystal director. A basic theory describing this effect allows us to measure the effective polarizability of the rods. Our approach is simple and applicable to a wide variety of asymmetric and polarizable particles.
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