Berlin 2018 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 68: Poster: Complex Fluids, Glasses, Granular

DY 68.9: Poster

Thursday, March 15, 2018, 15:30–18:00, Poster A

Binary mixtures of helical Yukawa rods studied by Monte Carlo simulations — •Motoya Suzaka, Anja Kuhnhold, and Tanja Schilling — Institute of Physics in University of Freiburg, Freiburg, Germany

Systems composed of chiral rod-like particles have a complex phase diagram. The main phases are isotropic, nematic, smectic and especially the cholesteric phase. To assess such complex phase diagrams, Monte-Carlo(MC) simulations can be applied. As model system we use helical Yukawa rods where the chirality is due to point charges, that are helically wrapped around the surface.

Of special interest for technical application is the cholesteric pitch in the equilibrium state. We started to study monodisperse systems first. But more meaningful for comparisons to experimental systems are studies on polydisperse systems. The simplest kind of a polydisperse system is a binary one. We therefore use binary mixtures with different particle lengths, surface charges or internal pitches. To simulate the equilibrium cholesteric phase we apply MC simulations and special boundary conditions.[1]

[1] A. Kuhnhold and T. Schilling, J. Chem. Phys. 145, 194904 (2016).