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Cylindrical defect structures formed by chiral nematic liquid crystal in quasi-one-dimensional nanotubes

Abstract

Blue phases are three–dimensional self–assembly structures of liquid crystals with a lattice of line defects. They have attracted considerable interest as photonic materials. It is well known that blue phases occur in cholesteric liquid crystals (CLCs) under certain thermodynamic conditions; however, recent studies have indicated that confining surfaces may induce distinctive struc- tural changes. For example, in a previous study, a quasi–two–dimensional (Q2D) confinement system was investigated with the aid of numerical calculations, and a stable Q2D Skyrmion structure was attained. Here, we performed molecular simulations to investigate the CLC phase behavior at the molecular scale for a quasi–one–dimensional (Q1D) nanotube system. Various morphological behaviors of CLCs were observed by changing the temperature and the radius of the nanotubes. In particular, we discovered a self–assembled structure with cylindrical (or ring-like) defects rather than lines by introducing a novel local orientation analysis. Our simulation results show that self–assembly of CLCs offers a guide to control of the intensity in Q1D systems and fundamental knowledge for their application to optical devices.

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Supplementary files

Article information


Submitted
20 Mar 2020
Accepted
20 Jun 2020
First published
25 Jun 2020

Phys. Chem. Chem. Phys., 2020, Accepted Manuscript
Article type
Paper

Cylindrical defect structures formed by chiral nematic liquid crystal in quasi-one-dimensional nanotubes

H. Tsujinoue, T. Nozawa and N. Arai, Phys. Chem. Chem. Phys., 2020, Accepted Manuscript , DOI: 10.1039/D0CP01526A

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