Berlin 2015 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 51: Complex Fluids and Soft Matter - Part III (joint session DY/ CPP / BP)

DY 51.4: Vortrag

Donnerstag, 19. März 2015, 16:00–16:15, BH-N 334

Molecular simulations of liquid crystalline ferrofluids — •Stavros Peroukidis and Sabine Klapp — Institute of theoretical physics, Technical University of Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

We explore the phase behavior and self assembly in binary mixtures of uniaxial rod and magnetic dipolar sphere particles by means of molecular simulations. We find that the mesogenic rods support the formation of orientational ordered ferromagnetic chains which, in turn, enhance the order of the liquid crystal. This ends up to liquid crystalline ferrofluids that possess two principal directors (one for each species). The antiparallel arrangement of the ferromagnetic chains, within the mesophases, cancels out macroscopic spontaneous magnetization. Depending on the relative size of the species, the directors are on average either parallel or perpendicular to each other, giving rise to uniaxial or biaxial liquid crystalline ferrofluids including: nematic, smectic, columnar phases and phase transformations between them.