Noncentral forces mediated between two inclusions in a bath of active Brownian rods

Abstract Using Brownian Dynamics simulations, we study effective interactions mediated between two identical and impermeable disks (inclusions) immersed in a bath of identical, active (self-propelled), Brownian rods in two spatial dimensions, by assuming that the self-propulsion axis of the rods may...

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Autores principales:	Mahmoud Sebtosheikh, Ali Naji
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0b9c09cfd21643e3843ad1d25255cf90
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spelling	oai:doaj.org-article:0b9c09cfd21643e3843ad1d25255cf902021-12-05T12:12:28ZNoncentral forces mediated between two inclusions in a bath of active Brownian rods10.1038/s41598-021-02295-y2045-2322https://doaj.org/article/0b9c09cfd21643e3843ad1d25255cf902021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02295-yhttps://doaj.org/toc/2045-2322Abstract Using Brownian Dynamics simulations, we study effective interactions mediated between two identical and impermeable disks (inclusions) immersed in a bath of identical, active (self-propelled), Brownian rods in two spatial dimensions, by assuming that the self-propulsion axis of the rods may generally deviate from their longitudinal axis. When the self-propulsion is transverse (perpendicular to the rod axis), the accumulation of active rods around the inclusions is significantly enhanced, causing a more expansive steric layering (ring formation) of the rods around the inclusions, as compared with the reference case of longitudinally self-propelling rods. As a result, the transversally self-propelling rods also mediate a significantly longer ranged effective interaction between the inclusions. The bath-mediated interaction arises due to the overlaps between the active-rod rings formed around the inclusions, as they are brought into small separations. When the self-propulsion axis is tilted relative to the rod axis, we find an asymmetric imbalance of active-rod accumulation around the inclusion dimer. This leads to a noncentral interaction, featuring an anti-parallel pair of transverse force components and, hence, a bath-mediated torque on the dimer.Mahmoud SebtosheikhAli NajiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mahmoud Sebtosheikh Ali Naji Noncentral forces mediated between two inclusions in a bath of active Brownian rods
description	Abstract Using Brownian Dynamics simulations, we study effective interactions mediated between two identical and impermeable disks (inclusions) immersed in a bath of identical, active (self-propelled), Brownian rods in two spatial dimensions, by assuming that the self-propulsion axis of the rods may generally deviate from their longitudinal axis. When the self-propulsion is transverse (perpendicular to the rod axis), the accumulation of active rods around the inclusions is significantly enhanced, causing a more expansive steric layering (ring formation) of the rods around the inclusions, as compared with the reference case of longitudinally self-propelling rods. As a result, the transversally self-propelling rods also mediate a significantly longer ranged effective interaction between the inclusions. The bath-mediated interaction arises due to the overlaps between the active-rod rings formed around the inclusions, as they are brought into small separations. When the self-propulsion axis is tilted relative to the rod axis, we find an asymmetric imbalance of active-rod accumulation around the inclusion dimer. This leads to a noncentral interaction, featuring an anti-parallel pair of transverse force components and, hence, a bath-mediated torque on the dimer.
format	article
author	Mahmoud Sebtosheikh Ali Naji
author_facet	Mahmoud Sebtosheikh Ali Naji
author_sort	Mahmoud Sebtosheikh
title	Noncentral forces mediated between two inclusions in a bath of active Brownian rods
title_short	Noncentral forces mediated between two inclusions in a bath of active Brownian rods
title_full	Noncentral forces mediated between two inclusions in a bath of active Brownian rods
title_fullStr	Noncentral forces mediated between two inclusions in a bath of active Brownian rods
title_full_unstemmed	Noncentral forces mediated between two inclusions in a bath of active Brownian rods
title_sort	noncentral forces mediated between two inclusions in a bath of active brownian rods
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0b9c09cfd21643e3843ad1d25255cf90
work_keys_str_mv	AT mahmoudsebtosheikh noncentralforcesmediatedbetweentwoinclusionsinabathofactivebrownianrods AT alinaji noncentralforcesmediatedbetweentwoinclusionsinabathofactivebrownianrods
_version_	1718372115877462016

Noncentral forces mediated between two inclusions in a bath of active Brownian rods

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