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Symmetry breaking and structure of a mixture of nematic liquid crystals and anisotropic nanoparticles
Orientational ordering of a homogeneous mixture of uniaxial liquid crystalline (LC) molecules and magnetic nanoparticles (NPs) is studied using the Lebwohl–Lasher lattice model. We consider cases where NPs tend to be oriented perpendicularly to LC molecules due to elastic forces. We study domain-typ...
Autores principales: | , , |
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Formato: | Texto |
Lenguaje: | English |
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Beilstein-Institut
2010
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2919260/ https://www.ncbi.nlm.nih.gov/pubmed/20703373 http://dx.doi.org/10.3762/bjoc.6.74 |
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author | Krasna, Marjan Cvetko, Matej Ambrožič, Milan |
author_facet | Krasna, Marjan Cvetko, Matej Ambrožič, Milan |
author_sort | Krasna, Marjan |
collection | PubMed |
description | Orientational ordering of a homogeneous mixture of uniaxial liquid crystalline (LC) molecules and magnetic nanoparticles (NPs) is studied using the Lebwohl–Lasher lattice model. We consider cases where NPs tend to be oriented perpendicularly to LC molecules due to elastic forces. We study domain-type configurations of ensembles, which are quenched from the isotropic phase. We show that for large enough concentrations of NPs the long range uniaxial nematic ordering is replaced by short range order exhibiting strong biaxiality. This suggests that the impact of NPs on orientational ordering of LCs for appropriate concentrations of NPs is reminiscent to the influence of quenched random fields which locally enforce a biaxial ordering. |
format | Text |
id | pubmed-2919260 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Beilstein-Institut |
record_format | MEDLINE/PubMed |
spelling | pubmed-29192602010-08-11 Symmetry breaking and structure of a mixture of nematic liquid crystals and anisotropic nanoparticles Krasna, Marjan Cvetko, Matej Ambrožič, Milan Beilstein J Org Chem Full Research Paper Orientational ordering of a homogeneous mixture of uniaxial liquid crystalline (LC) molecules and magnetic nanoparticles (NPs) is studied using the Lebwohl–Lasher lattice model. We consider cases where NPs tend to be oriented perpendicularly to LC molecules due to elastic forces. We study domain-type configurations of ensembles, which are quenched from the isotropic phase. We show that for large enough concentrations of NPs the long range uniaxial nematic ordering is replaced by short range order exhibiting strong biaxiality. This suggests that the impact of NPs on orientational ordering of LCs for appropriate concentrations of NPs is reminiscent to the influence of quenched random fields which locally enforce a biaxial ordering. Beilstein-Institut 2010-07-07 /pmc/articles/PMC2919260/ /pubmed/20703373 http://dx.doi.org/10.3762/bjoc.6.74 Text en Copyright © 2010, Krasna et al. https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjoc/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Organic Chemistry terms and conditions: (https://www.beilstein-journals.org/bjoc/terms) |
spellingShingle | Full Research Paper Krasna, Marjan Cvetko, Matej Ambrožič, Milan Symmetry breaking and structure of a mixture of nematic liquid crystals and anisotropic nanoparticles |
title | Symmetry breaking and structure of a mixture of nematic liquid crystals and anisotropic nanoparticles |
title_full | Symmetry breaking and structure of a mixture of nematic liquid crystals and anisotropic nanoparticles |
title_fullStr | Symmetry breaking and structure of a mixture of nematic liquid crystals and anisotropic nanoparticles |
title_full_unstemmed | Symmetry breaking and structure of a mixture of nematic liquid crystals and anisotropic nanoparticles |
title_short | Symmetry breaking and structure of a mixture of nematic liquid crystals and anisotropic nanoparticles |
title_sort | symmetry breaking and structure of a mixture of nematic liquid crystals and anisotropic nanoparticles |
topic | Full Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2919260/ https://www.ncbi.nlm.nih.gov/pubmed/20703373 http://dx.doi.org/10.3762/bjoc.6.74 |
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