Formation of disclinations line near a free nematic interface

We have studied the nucleation and the physical properties of a -1/2 wedge disclination line near the free surface of a confined nematic liquid crystal. The position of the disclination line has been related to the material parameters (elastic constants, anchoring energy, and favored anchoring angle...

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Autores: Ignés i Mullol, Jordi, Baudry, Jean, Lejcek, Lubor, Oswald, Patrick
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1999
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/18911
Acceso en línea:https://hdl.handle.net/2445/18911
Access Level:acceso abierto
Palabra clave:Estructura cristal·lina (Sòlids)
Cristal·lografia
Structure of solids and liquids
Crystallography
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spelling Formation of disclinations line near a free nematic interfaceIgnés i Mullol, JordiBaudry, JeanLejcek, LuborOswald, PatrickEstructura cristal·lina (Sòlids)Cristal·lografiaStructure of solids and liquidsCrystallographyWe have studied the nucleation and the physical properties of a -1/2 wedge disclination line near the free surface of a confined nematic liquid crystal. The position of the disclination line has been related to the material parameters (elastic constants, anchoring energy, and favored anchoring angle of the molecules at the free surface). The use of a planar model for the structure of the director field (whose predictions have been contrasted to those of a fully three-dimensional model) has allowed us to relate the experimentally observed position of the disclination line to the relevant properties of the liquid crystals. In particular, we have been able to observe the collapse of the disclination line due to a temperature-induced anchoring-angle transition, which has allowed us to rule out the presence of a real disclination line near the nematic/isotropic front in directional growth experiments.The American Physical Society1999info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/18911Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.59.568Physical Review e, 1999, vol. 59, p. 568-577http://dx.doi.org/10.1103/PhysRevE.59.568(c) American Physical Society, 1999info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/189112026-05-27T06:46:51Z
dc.title.none.fl_str_mv Formation of disclinations line near a free nematic interface
title Formation of disclinations line near a free nematic interface
spellingShingle Formation of disclinations line near a free nematic interface
Ignés i Mullol, Jordi
Estructura cristal·lina (Sòlids)
Cristal·lografia
Structure of solids and liquids
Crystallography
title_short Formation of disclinations line near a free nematic interface
title_full Formation of disclinations line near a free nematic interface
title_fullStr Formation of disclinations line near a free nematic interface
title_full_unstemmed Formation of disclinations line near a free nematic interface
title_sort Formation of disclinations line near a free nematic interface
dc.creator.none.fl_str_mv Ignés i Mullol, Jordi
Baudry, Jean
Lejcek, Lubor
Oswald, Patrick
author Ignés i Mullol, Jordi
author_facet Ignés i Mullol, Jordi
Baudry, Jean
Lejcek, Lubor
Oswald, Patrick
author_role author
author2 Baudry, Jean
Lejcek, Lubor
Oswald, Patrick
author2_role author
author
author
dc.subject.none.fl_str_mv Estructura cristal·lina (Sòlids)
Cristal·lografia
Structure of solids and liquids
Crystallography
topic Estructura cristal·lina (Sòlids)
Cristal·lografia
Structure of solids and liquids
Crystallography
description We have studied the nucleation and the physical properties of a -1/2 wedge disclination line near the free surface of a confined nematic liquid crystal. The position of the disclination line has been related to the material parameters (elastic constants, anchoring energy, and favored anchoring angle of the molecules at the free surface). The use of a planar model for the structure of the director field (whose predictions have been contrasted to those of a fully three-dimensional model) has allowed us to relate the experimentally observed position of the disclination line to the relevant properties of the liquid crystals. In particular, we have been able to observe the collapse of the disclination line due to a temperature-induced anchoring-angle transition, which has allowed us to rule out the presence of a real disclination line near the nematic/isotropic front in directional growth experiments.
publishDate 1999
dc.date.none.fl_str_mv 1999
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/18911
url https://hdl.handle.net/2445/18911
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.59.568
Physical Review e, 1999, vol. 59, p. 568-577
http://dx.doi.org/10.1103/PhysRevE.59.568
dc.rights.none.fl_str_mv (c) American Physical Society, 1999
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 1999
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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