Statistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles

A molecular field theory of the cholesteric ordering in nematic nanocomposites doped with chiral nanoparticles was developed taking into consideration chiral dispersion interaction between rod-like nanoparticles. It was shown that the inverse pitch of the cholesteric helical structure is proportiona...

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Autores principales:	Mikhail A. Osipov, Alexey S. Merekalov, Alexander A. Ezhov
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	liquid crystal molecular statistical theory nanocomposite Crystallography QD901-999
Acceso en línea:	https://doaj.org/article/ea223e27be5f42e3b332263a1856f6d8
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spelling	oai:doaj.org-article:ea223e27be5f42e3b332263a1856f6d82021-11-25T17:19:44ZStatistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles10.3390/cryst111114322073-4352https://doaj.org/article/ea223e27be5f42e3b332263a1856f6d82021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1432https://doaj.org/toc/2073-4352A molecular field theory of the cholesteric ordering in nematic nanocomposites doped with chiral nanoparticles was developed taking into consideration chiral dispersion interaction between rod-like nanoparticles. It was shown that the inverse pitch of the cholesteric helical structure is proportional to the anisotropy of the effective polarizability and the anisotropy of the effective gyration tensor of a nanoparticle in the nematic host. The theory enables one to predict the helical sense inversion induced by a change of the low-frequency dielectric susceptibility of the nematic host phase. The components of the high-frequency effective polarizability and the effective optical activity of a gold rod-like nanoparticle in a particular nematic solvent were calculated numerically.Mikhail A. OsipovAlexey S. MerekalovAlexander A. EzhovMDPI AGarticleliquid crystalmolecular statistical theorynanocompositeCrystallographyQD901-999ENCrystals, Vol 11, Iss 1432, p 1432 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	liquid crystal molecular statistical theory nanocomposite Crystallography QD901-999
spellingShingle	liquid crystal molecular statistical theory nanocomposite Crystallography QD901-999 Mikhail A. Osipov Alexey S. Merekalov Alexander A. Ezhov Statistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles
description	A molecular field theory of the cholesteric ordering in nematic nanocomposites doped with chiral nanoparticles was developed taking into consideration chiral dispersion interaction between rod-like nanoparticles. It was shown that the inverse pitch of the cholesteric helical structure is proportional to the anisotropy of the effective polarizability and the anisotropy of the effective gyration tensor of a nanoparticle in the nematic host. The theory enables one to predict the helical sense inversion induced by a change of the low-frequency dielectric susceptibility of the nematic host phase. The components of the high-frequency effective polarizability and the effective optical activity of a gold rod-like nanoparticle in a particular nematic solvent were calculated numerically.
format	article
author	Mikhail A. Osipov Alexey S. Merekalov Alexander A. Ezhov
author_facet	Mikhail A. Osipov Alexey S. Merekalov Alexander A. Ezhov
author_sort	Mikhail A. Osipov
title	Statistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles
title_short	Statistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles
title_full	Statistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles
title_fullStr	Statistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles
title_full_unstemmed	Statistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles
title_sort	statistical theory of helical twisting in nematic liquid crystals doped with chiral nanoparticles
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ea223e27be5f42e3b332263a1856f6d8
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Statistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles

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