Curvature controlled defect dynamics in topological active nematics

Abstract We study the spatiotemporal patterns that emerge when an active nematic film is topologically constraint. These topological constraints allow to control the non-equilibrium dynamics of the active system. We consider ellipsoidal shapes for which the resulting defects are 1/2 disclinations an...

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Autores principales:	Francesco Alaimo, Christian Köhler, Axel Voigt
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3b988d3b08724f65a88ed4028fe869c4
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spelling	oai:doaj.org-article:3b988d3b08724f65a88ed4028fe869c42021-12-02T16:06:22ZCurvature controlled defect dynamics in topological active nematics10.1038/s41598-017-05612-62045-2322https://doaj.org/article/3b988d3b08724f65a88ed4028fe869c42017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05612-6https://doaj.org/toc/2045-2322Abstract We study the spatiotemporal patterns that emerge when an active nematic film is topologically constraint. These topological constraints allow to control the non-equilibrium dynamics of the active system. We consider ellipsoidal shapes for which the resulting defects are 1/2 disclinations and analyze the relation between their location and dynamics and local geometric properties of the ellipsoid. We highlight two dynamic modes: a tunable periodic state that oscillates between two defect configurations on a spherical shape and a tunable rotating state for oblate spheroids. We further demonstrate the relation between defects and high Gaussian curvature and umbilical points and point out limits for a coarse-grained description of defects as self-propelled particles.Francesco AlaimoChristian KöhlerAxel VoigtNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Francesco Alaimo Christian Köhler Axel Voigt Curvature controlled defect dynamics in topological active nematics
description	Abstract We study the spatiotemporal patterns that emerge when an active nematic film is topologically constraint. These topological constraints allow to control the non-equilibrium dynamics of the active system. We consider ellipsoidal shapes for which the resulting defects are 1/2 disclinations and analyze the relation between their location and dynamics and local geometric properties of the ellipsoid. We highlight two dynamic modes: a tunable periodic state that oscillates between two defect configurations on a spherical shape and a tunable rotating state for oblate spheroids. We further demonstrate the relation between defects and high Gaussian curvature and umbilical points and point out limits for a coarse-grained description of defects as self-propelled particles.
format	article
author	Francesco Alaimo Christian Köhler Axel Voigt
author_facet	Francesco Alaimo Christian Köhler Axel Voigt
author_sort	Francesco Alaimo
title	Curvature controlled defect dynamics in topological active nematics
title_short	Curvature controlled defect dynamics in topological active nematics
title_full	Curvature controlled defect dynamics in topological active nematics
title_fullStr	Curvature controlled defect dynamics in topological active nematics
title_full_unstemmed	Curvature controlled defect dynamics in topological active nematics
title_sort	curvature controlled defect dynamics in topological active nematics
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/3b988d3b08724f65a88ed4028fe869c4
work_keys_str_mv	AT francescoalaimo curvaturecontrolleddefectdynamicsintopologicalactivenematics AT christiankohler curvaturecontrolleddefectdynamicsintopologicalactivenematics AT axelvoigt curvaturecontrolleddefectdynamicsintopologicalactivenematics
_version_	1718385016925323264

Curvature controlled defect dynamics in topological active nematics

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