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Defect Structures of Magnetic Nanoparticles in Smectic A Liquid Crystals

Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 21 Prague, Czech Republic
Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague, Czech Republic
Author to whom correspondence should be addressed.
Academic Editors: Viorel Circu, Pradip K. Bhowmik, Doina Manaila-Maximean and Valery A. Loiko
Molecules 2021, 26(18), 5717;
Received: 20 July 2021 / Revised: 15 September 2021 / Accepted: 17 September 2021 / Published: 21 September 2021
(This article belongs to the Special Issue Liquid Crystals 2020)
Topological defects in anisotropic fluids like liquid crystals serve as a playground for the research of various effects. In this study, we concentrated on a hybrid system of chiral rod-like molecules doped by magnetic nanoparticles. In textures of the smectic A phase, we observed linear defects and found that clusters of nanoparticles promote nucleation of smectic layer defects just at the phase transition from the isotropic to the smectic A (SmA) phase. In different geometries, we studied and analysed creation of defects which can be explained by attractive elastic forces between nanoparticles in the SmA phase. On cooling the studied hybrid system, clusters grow up to the critical dimension, and the smectic texture is stabilised. The presented effects are theoretically described and explained if we consider the elastic interaction of two point defects and stabilisation of prismatic dislocation loops due to the presence of nanoparticles. View Full-Text
Keywords: liquid crystals; smectics; dislocation loops; inclusions liquid crystals; smectics; dislocation loops; inclusions
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MDPI and ACS Style

Novotná, V.; Lejček, L.; Hamplová, V.; Vejpravová, J. Defect Structures of Magnetic Nanoparticles in Smectic A Liquid Crystals. Molecules 2021, 26, 5717.

AMA Style

Novotná V, Lejček L, Hamplová V, Vejpravová J. Defect Structures of Magnetic Nanoparticles in Smectic A Liquid Crystals. Molecules. 2021; 26(18):5717.

Chicago/Turabian Style

Novotná, Vladimíra, Lubor Lejček, Věra Hamplová, and Jana Vejpravová. 2021. "Defect Structures of Magnetic Nanoparticles in Smectic A Liquid Crystals" Molecules 26, no. 18: 5717.

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