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Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases

Monte Carlo simulations of chiral liquid-crystals, represented by a simple coarse-grained chiral Gay–Berne model, were performed to investigate the effect of central longitudinal dipole interactions on phase behavior. A systematic analysis of the structural properties and phase behavior of both achi...

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Detalles Bibliográficos
Autores principales: Nozawa, Takuma, Brumby, Paul E., Yasuoka, Kenji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6164681/
https://www.ncbi.nlm.nih.gov/pubmed/30208651
http://dx.doi.org/10.3390/ijms19092715
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author Nozawa, Takuma
Brumby, Paul E.
Yasuoka, Kenji
author_facet Nozawa, Takuma
Brumby, Paul E.
Yasuoka, Kenji
author_sort Nozawa, Takuma
collection PubMed
description Monte Carlo simulations of chiral liquid-crystals, represented by a simple coarse-grained chiral Gay–Berne model, were performed to investigate the effect of central longitudinal dipole interactions on phase behavior. A systematic analysis of the structural properties and phase behavior of both achiral and chiral systems, with dipole interactions, reveals differing effects; strong dipole interactions enhance the formation of layered structures; however, chiral interactions may prevent the formation of such phases under certain conditions. We also observed a short-ranged smectic structure within the cholesteric phases with strong dipole interactions. This constitutes possible evidence of presmectic ordering and/or the existence of chiral line liquid phases, which have previously been observed in X-ray experiments to occur between the smectic twisted grain boundary and cholesteric phases. These results provide a systematic understanding of how the phase behavior of chiral liquid-crystals changes when alterations are made to the strength of dipole interactions.
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spelling pubmed-61646812018-10-10 Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases Nozawa, Takuma Brumby, Paul E. Yasuoka, Kenji Int J Mol Sci Article Monte Carlo simulations of chiral liquid-crystals, represented by a simple coarse-grained chiral Gay–Berne model, were performed to investigate the effect of central longitudinal dipole interactions on phase behavior. A systematic analysis of the structural properties and phase behavior of both achiral and chiral systems, with dipole interactions, reveals differing effects; strong dipole interactions enhance the formation of layered structures; however, chiral interactions may prevent the formation of such phases under certain conditions. We also observed a short-ranged smectic structure within the cholesteric phases with strong dipole interactions. This constitutes possible evidence of presmectic ordering and/or the existence of chiral line liquid phases, which have previously been observed in X-ray experiments to occur between the smectic twisted grain boundary and cholesteric phases. These results provide a systematic understanding of how the phase behavior of chiral liquid-crystals changes when alterations are made to the strength of dipole interactions. MDPI 2018-09-11 /pmc/articles/PMC6164681/ /pubmed/30208651 http://dx.doi.org/10.3390/ijms19092715 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Nozawa, Takuma
Brumby, Paul E.
Yasuoka, Kenji
Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases
title Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases
title_full Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases
title_fullStr Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases
title_full_unstemmed Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases
title_short Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases
title_sort effect of central longitudinal dipole interactions on chiral liquid-crystal phases
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6164681/
https://www.ncbi.nlm.nih.gov/pubmed/30208651
http://dx.doi.org/10.3390/ijms19092715
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