Stability of a double twisted structure in spherical cholesteric droplets

Soft Matter
Jun YoshiokaYuka Tabe

Abstract

We found for the first time the stabilization of a double twisted structure in cholesteric liquid crystals confined to small spherical droplets under weak anchoring conditions. The direct observation of the droplets using a polarized microscope revealed the physical properties of the structure. The experimental results showed that the stability of the double twisted structure is determined by the relationship between the helical pitch length and the droplet size. We theoretically analyzed the structural stability by the calculation of the Frank elastic free energy including the surface elastic term, and succeeded in explaining the experimental results. In this paper, we concluded that the stability of the double twisted structure is determined by the competition between the surface and the bulk elasticity.

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Citations

Jan 19, 2019·Soft Matter·Jun YoshiokaAgnes Buka
Mar 28, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Jun Yoshioka, Koji Fukao
Apr 16, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Anna P GardymovaVictor Ya Zyryanov
Jun 20, 2020·The Journal of Physical Chemistry. B·Shinji BonoYuka Tabe

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