Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces

We investigate the dynamic assembly and swarm translocation of anisometric colloidal particles dispersed in a nematic liquid crystal and driven above a photosensitive surface. We use liquid crystal-enabled electrophoresis to propel these particles via an alternating electric field perpendicular to t...

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Detalhes bibliográficos
Autores: Straube, Arthur V., Pagès Casas, Josep M., Ortiz-Ambriz, Antonio, Tierno, Pietro, Ignés i Mullol, Jordi, Sagués i Mestre, Francesc
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/127850
Acesso em linha:https://hdl.handle.net/2445/127850
Access Level:acceso abierto
Palavra-chave:Col·loides
Cristalls líquids
Colloids
Liquid crystals
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spelling Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfacesStraube, Arthur V.Pagès Casas, Josep M.Ortiz-Ambriz, AntonioTierno, PietroIgnés i Mullol, JordiSagués i Mestre, FrancescCol·loidesCristalls líquidsColloidsLiquid crystalsWe investigate the dynamic assembly and swarm translocation of anisometric colloidal particles dispersed in a nematic liquid crystal and driven above a photosensitive surface. We use liquid crystal-enabled electrophoresis to propel these particles via an alternating electric field perpendicular to the sample cell. By manipulating the anchoring conditions on one surface of the experimental cell, we obtain a spatially extended spiral pattern of the liquid crystal orientation that induces the dynamic assembly of a rotating colloidal mill. This structure can be transported by translocating the topological defect above the photosensitive surface. We complement our findings with a theoretical model that captures the basic physics of the process, by formulating an analytic equation for the director field above the surface. Our reconfigurable nematic assemblies may be used as a test bed for complex swarming behaviour in biological and artificial microscale systems.Institute of Physics Pub.2019201920182019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/127850Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: http://iopscience.iop.org/article/10.1088/1367-2630/aac3c6New Journal of Physics, 2018, vol. 20, p. 075006info:eu-repo/grantAgreement/EC/H2020/665440(c) IOP Publishing Ltd and Deutsche Physikalische Gesellschaft, 2018info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1278502026-05-29T05:05:01Z
dc.title.none.fl_str_mv Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces
title Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces
spellingShingle Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces
Straube, Arthur V.
Col·loides
Cristalls líquids
Colloids
Liquid crystals
title_short Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces
title_full Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces
title_fullStr Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces
title_full_unstemmed Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces
title_sort Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces
dc.creator.none.fl_str_mv Straube, Arthur V.
Pagès Casas, Josep M.
Ortiz-Ambriz, Antonio
Tierno, Pietro
Ignés i Mullol, Jordi
Sagués i Mestre, Francesc
author Straube, Arthur V.
author_facet Straube, Arthur V.
Pagès Casas, Josep M.
Ortiz-Ambriz, Antonio
Tierno, Pietro
Ignés i Mullol, Jordi
Sagués i Mestre, Francesc
author_role author
author2 Pagès Casas, Josep M.
Ortiz-Ambriz, Antonio
Tierno, Pietro
Ignés i Mullol, Jordi
Sagués i Mestre, Francesc
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Col·loides
Cristalls líquids
Colloids
Liquid crystals
topic Col·loides
Cristalls líquids
Colloids
Liquid crystals
description We investigate the dynamic assembly and swarm translocation of anisometric colloidal particles dispersed in a nematic liquid crystal and driven above a photosensitive surface. We use liquid crystal-enabled electrophoresis to propel these particles via an alternating electric field perpendicular to the sample cell. By manipulating the anchoring conditions on one surface of the experimental cell, we obtain a spatially extended spiral pattern of the liquid crystal orientation that induces the dynamic assembly of a rotating colloidal mill. This structure can be transported by translocating the topological defect above the photosensitive surface. We complement our findings with a theoretical model that captures the basic physics of the process, by formulating an analytic equation for the director field above the surface. Our reconfigurable nematic assemblies may be used as a test bed for complex swarming behaviour in biological and artificial microscale systems.
publishDate 2018
dc.date.none.fl_str_mv 2018
2019
2019
2019
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/2445/127850
url https://hdl.handle.net/2445/127850
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://iopscience.iop.org/article/10.1088/1367-2630/aac3c6
New Journal of Physics, 2018, vol. 20, p. 075006
info:eu-repo/grantAgreement/EC/H2020/665440
dc.rights.none.fl_str_mv (c) IOP Publishing Ltd and Deutsche Physikalische Gesellschaft, 2018
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) IOP Publishing Ltd and Deutsche Physikalische Gesellschaft, 2018
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Institute of Physics Pub.
publisher.none.fl_str_mv Institute of Physics Pub.
dc.source.none.fl_str_mv Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,198674

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