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DY: Fachverband Dynamik und Statistische Physik

DY 32: Complex Fluids and Soft Matter (joint session DY/CPP)

DY 32.3: Vortrag

Mittwoch, 3. April 2019, 15:45–16:00, H3

Self-assembly and dynamics of mixtures of magnetic and non-magnetic liquid crystals under shear and external magnetic field — •Nima H. Siboni, Gaurav P. Shrivastav, and Sabine H. L . Klapp — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36 D-10623 Berlin

Doping liquid crystals with magnetic particles of different shapes enables us to control the properties of this delicate phase of matter via an external magnetic field [1,2]. In this talk, we focus on mixtures where the magnetic particles have the same shape as the liquid crystals. We study the self-assembly and dynamics of the mixture in and out of equilibrium [3]. In particular, we utilize non-equilibrium molecular dynamics simulation of Gay-Berne particles [4] to study (i) the (composition-dependent) effect of an external magnetic field on the isotropic-to-nematic transition of the mixture, and (ii) the interplay between shear-induced order and the magnetic field-induced order on the mechanical response of the mixture to an applied external shear.

References:

[1] I. Dierking, and S. E . San, Appl. Phys. Lett. 87, 233507 (2005).

[2] G. P. Shrivastav, and S. H. L. Klapp, arXiv:1809.08288.

[3] N. H. Siboni, G. P. Shrivastav, and S. H. L. Klapp, in preparation.

[4] J. G. Gay, and B. J. Berne, J. Chem. Phys., 74, 3316 (1981).