Elasticity-induced force reversal between active spinning particles in dense passive media

The self-organization of active particles is governed by their dynamic effective interactions. Such interactions are controlled by the medium in which such active agents reside. Here we study the interactions between active agents in a dense non-active medium. Our system consists of actuated, spinni...

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Main Authors:	Aragones, J. L., Steimel, J. P., Alexander-Katz, A.
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853433/

id	pubmed-4853433
recordtype	oai_dc
spelling	pubmed-48534332016-05-10 Elasticity-induced force reversal between active spinning particles in dense passive media Aragones, J. L. Steimel, J. P. Alexander-Katz, A. Article The self-organization of active particles is governed by their dynamic effective interactions. Such interactions are controlled by the medium in which such active agents reside. Here we study the interactions between active agents in a dense non-active medium. Our system consists of actuated, spinning, active particles embedded in a dense monolayer of passive, or non-active, particles. We demonstrate that the presence of the passive monolayer alters markedly the properties of the system and results in a reversal of the forces between active spinning particles from repulsive to attractive. The origin of such reversal is due to the coupling between the active stresses and elasticity of the system. This discovery provides a mechanism for the interaction between active agents in complex and structured media, opening up opportunities to tune the interaction range and directionality via the mechanical properties of the medium. Nature Publishing Group 2016-04-26 /pmc/articles/PMC4853433/ /pubmed/27112961 http://dx.doi.org/10.1038/ncomms11325 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Aragones, J. L. Steimel, J. P. Alexander-Katz, A.
spellingShingle	Aragones, J. L. Steimel, J. P. Alexander-Katz, A. Elasticity-induced force reversal between active spinning particles in dense passive media
author_facet	Aragones, J. L. Steimel, J. P. Alexander-Katz, A.
author_sort	Aragones, J. L.
title	Elasticity-induced force reversal between active spinning particles in dense passive media
title_short	Elasticity-induced force reversal between active spinning particles in dense passive media
title_full	Elasticity-induced force reversal between active spinning particles in dense passive media
title_fullStr	Elasticity-induced force reversal between active spinning particles in dense passive media
title_full_unstemmed	Elasticity-induced force reversal between active spinning particles in dense passive media
title_sort	elasticity-induced force reversal between active spinning particles in dense passive media
description	The self-organization of active particles is governed by their dynamic effective interactions. Such interactions are controlled by the medium in which such active agents reside. Here we study the interactions between active agents in a dense non-active medium. Our system consists of actuated, spinning, active particles embedded in a dense monolayer of passive, or non-active, particles. We demonstrate that the presence of the passive monolayer alters markedly the properties of the system and results in a reversal of the forces between active spinning particles from repulsive to attractive. The origin of such reversal is due to the coupling between the active stresses and elasticity of the system. This discovery provides a mechanism for the interaction between active agents in complex and structured media, opening up opportunities to tune the interaction range and directionality via the mechanical properties of the medium.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853433/
_version_	1613574168964497408

Elasticity-induced force reversal between active spinning particles in dense passive media

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