Elasticity of lyotropic chromonic liquid crystal Sunset Yellow probed by magnetic Frederiks transition
ORAL
Abstract
By using director reorientation in the magnetic field, we determine the concentration and temperature dependencies of the splay $K_1$, twist $K_2$, and bend $K_3$ elastic constants (normalized by the anisotropy of the diamagnetic susceptibility) for a nematic lyotropic chromonic liquid crystal (LCLC) Sunset Yellow. In a sharp contrast to thermotropic liquid crystals, the Frederiks effects in LCLC show a hysteresis, which is more pronounced at high concentration and low temperatures. We attribute the hysteresis to the changes in self-assembled structure of LCLC aggregates under the influence of field-imposed deformations.
*This work was supported by NSF MWN Lyotropic Chromonic Liquid Crystals grant DMR076290.
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Authors
Shuang Zhou
Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242
Yu. A. Nastishin
Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242
M.M. Omelchenko
Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242
L. Tortora
Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242
V.G. Nazarenko
Institute of Physics, prospect Nauky 46, Kiev-39, 03039, Ukraine
O.P. Boiko
Institute of Physics, prospect Nauky 46, Kiev-39, 03039, Ukraine
T. Ostapenko
Department of Physics, Kent State University, Kent, OH 44242
S.N. Sprunt
Department of Physics, Kent State University, Kent, OH 44242
J.T. Gleeson
Department of Physics, Kent State University, Kent, OH 44242
O.D. Lavrentovich
Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH, USA
Kent State University
Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242
