Anomalous diffusion of motile colloids dispersed in liquid crystals

We study the superdiffusion of driven colloidal particles dispersed in a nematic liquid crystal. While motion is ballistic in the driving direction, our experiments show that transversal fluctuations become superdiffusive depending on the topological defect pattern around the inclusions. The phenome...

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Detalles Bibliográficos
Autores: Pagès Casas, Josep M., Ignés i Mullol, Jordi, Sagués i Mestre, Francesc
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/141997
Acceso en línea:https://hdl.handle.net/2445/141997
Access Level:acceso abierto
Palabra clave:Col·loides
Cristalls líquids nemàtics
Colloids
Nematic liquid crystals
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spelling Anomalous diffusion of motile colloids dispersed in liquid crystalsPagès Casas, Josep M.Ignés i Mullol, JordiSagués i Mestre, FrancescCol·loidesCristalls líquids nemàticsColloidsNematic liquid crystalsWe study the superdiffusion of driven colloidal particles dispersed in a nematic liquid crystal. While motion is ballistic in the driving direction, our experiments show that transversal fluctuations become superdiffusive depending on the topological defect pattern around the inclusions. The phenomenon can be reproduced with different driving methods and propulsion speeds, while it is strongly dependent on particle size and temperature. We propose a mechanism based on the geometry of the liquid crystal backflow around the inclusions to justify the persistence of thermal fluctuations and to explain the observed temperature and particle size dependence of the superdiffusive behavior based on material and geometrical parameters.American Physical Society2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/141997Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.122.198001Physical Review Letters, 2019, vol. 122, num. 19https://doi.org/10.1103/PhysRevLett.122.198001info:eu-repo/grantAgreement/EC/H2020/665440(c) American Physical Society, 2019info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1419972026-05-27T06:46:51Z
dc.title.none.fl_str_mv Anomalous diffusion of motile colloids dispersed in liquid crystals
title Anomalous diffusion of motile colloids dispersed in liquid crystals
spellingShingle Anomalous diffusion of motile colloids dispersed in liquid crystals
Pagès Casas, Josep M.
Col·loides
Cristalls líquids nemàtics
Colloids
Nematic liquid crystals
title_short Anomalous diffusion of motile colloids dispersed in liquid crystals
title_full Anomalous diffusion of motile colloids dispersed in liquid crystals
title_fullStr Anomalous diffusion of motile colloids dispersed in liquid crystals
title_full_unstemmed Anomalous diffusion of motile colloids dispersed in liquid crystals
title_sort Anomalous diffusion of motile colloids dispersed in liquid crystals
dc.creator.none.fl_str_mv Pagès Casas, Josep M.
Ignés i Mullol, Jordi
Sagués i Mestre, Francesc
author Pagès Casas, Josep M.
author_facet Pagès Casas, Josep M.
Ignés i Mullol, Jordi
Sagués i Mestre, Francesc
author_role author
author2 Ignés i Mullol, Jordi
Sagués i Mestre, Francesc
author2_role author
author
dc.subject.none.fl_str_mv Col·loides
Cristalls líquids nemàtics
Colloids
Nematic liquid crystals
topic Col·loides
Cristalls líquids nemàtics
Colloids
Nematic liquid crystals
description We study the superdiffusion of driven colloidal particles dispersed in a nematic liquid crystal. While motion is ballistic in the driving direction, our experiments show that transversal fluctuations become superdiffusive depending on the topological defect pattern around the inclusions. The phenomenon can be reproduced with different driving methods and propulsion speeds, while it is strongly dependent on particle size and temperature. We propose a mechanism based on the geometry of the liquid crystal backflow around the inclusions to justify the persistence of thermal fluctuations and to explain the observed temperature and particle size dependence of the superdiffusive behavior based on material and geometrical parameters.
publishDate 2019
dc.date.none.fl_str_mv 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/2445/141997
url https://hdl.handle.net/2445/141997
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.122.198001
Physical Review Letters, 2019, vol. 122, num. 19
https://doi.org/10.1103/PhysRevLett.122.198001
info:eu-repo/grantAgreement/EC/H2020/665440
dc.rights.none.fl_str_mv (c) American Physical Society, 2019
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2019
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv 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 15,300724

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