Emergence of Bimodal Motility in Active Droplets

Artificial model swimmers offer a platform to explore the physical principles enabling biological complexity, for example, multigait motility: a strategy employed by many biomicroswimmers to explore and react to changes in their environment. Here, we report bimodal motility in autophoretic droplet s...

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Autores principales:	Babak Vajdi Hokmabad, Ranabir Dey, Maziyar Jalaal, Devaditya Mohanty, Madina Almukambetova, Kyle A. Baldwin, Detlef Lohse, Corinna C. Maass
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/e494036d714c435cabbad7815f6ec800
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id	oai:doaj.org-article:e494036d714c435cabbad7815f6ec800
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spelling	oai:doaj.org-article:e494036d714c435cabbad7815f6ec8002021-12-02T13:41:54ZEmergence of Bimodal Motility in Active Droplets10.1103/PhysRevX.11.0110432160-3308https://doaj.org/article/e494036d714c435cabbad7815f6ec8002021-03-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.011043http://doi.org/10.1103/PhysRevX.11.011043https://doaj.org/toc/2160-3308Artificial model swimmers offer a platform to explore the physical principles enabling biological complexity, for example, multigait motility: a strategy employed by many biomicroswimmers to explore and react to changes in their environment. Here, we report bimodal motility in autophoretic droplet swimmers, driven by characteristic interfacial flow patterns for each propulsive mode. We demonstrate a dynamical transition from quasiballistic to bimodal chaotic propulsion by controlling the viscosity of the environment. To elucidate the physical mechanism of this transition, we simultaneously visualize hydrodynamic and chemical fields and interpret these observations by quantitative comparison to established advection-diffusion models. We show that, with increasing viscosity, higher hydrodynamic modes become excitable and the droplet recurrently switches between two dominant modes due to interactions with the self-generated chemical gradients. This type of self-interaction promotes self-avoiding walks mimicking examples of efficient spatial exploration strategies observed in nature.Babak Vajdi HokmabadRanabir DeyMaziyar JalaalDevaditya MohantyMadina AlmukambetovaKyle A. BaldwinDetlef LohseCorinna C. MaassAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 1, p 011043 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Babak Vajdi Hokmabad Ranabir Dey Maziyar Jalaal Devaditya Mohanty Madina Almukambetova Kyle A. Baldwin Detlef Lohse Corinna C. Maass Emergence of Bimodal Motility in Active Droplets
description	Artificial model swimmers offer a platform to explore the physical principles enabling biological complexity, for example, multigait motility: a strategy employed by many biomicroswimmers to explore and react to changes in their environment. Here, we report bimodal motility in autophoretic droplet swimmers, driven by characteristic interfacial flow patterns for each propulsive mode. We demonstrate a dynamical transition from quasiballistic to bimodal chaotic propulsion by controlling the viscosity of the environment. To elucidate the physical mechanism of this transition, we simultaneously visualize hydrodynamic and chemical fields and interpret these observations by quantitative comparison to established advection-diffusion models. We show that, with increasing viscosity, higher hydrodynamic modes become excitable and the droplet recurrently switches between two dominant modes due to interactions with the self-generated chemical gradients. This type of self-interaction promotes self-avoiding walks mimicking examples of efficient spatial exploration strategies observed in nature.
format	article
author	Babak Vajdi Hokmabad Ranabir Dey Maziyar Jalaal Devaditya Mohanty Madina Almukambetova Kyle A. Baldwin Detlef Lohse Corinna C. Maass
author_facet	Babak Vajdi Hokmabad Ranabir Dey Maziyar Jalaal Devaditya Mohanty Madina Almukambetova Kyle A. Baldwin Detlef Lohse Corinna C. Maass
author_sort	Babak Vajdi Hokmabad
title	Emergence of Bimodal Motility in Active Droplets
title_short	Emergence of Bimodal Motility in Active Droplets
title_full	Emergence of Bimodal Motility in Active Droplets
title_fullStr	Emergence of Bimodal Motility in Active Droplets
title_full_unstemmed	Emergence of Bimodal Motility in Active Droplets
title_sort	emergence of bimodal motility in active droplets
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/e494036d714c435cabbad7815f6ec800
work_keys_str_mv	AT babakvajdihokmabad emergenceofbimodalmotilityinactivedroplets AT ranabirdey emergenceofbimodalmotilityinactivedroplets AT maziyarjalaal emergenceofbimodalmotilityinactivedroplets AT devadityamohanty emergenceofbimodalmotilityinactivedroplets AT madinaalmukambetova emergenceofbimodalmotilityinactivedroplets AT kyleabaldwin emergenceofbimodalmotilityinactivedroplets AT detleflohse emergenceofbimodalmotilityinactivedroplets AT corinnacmaass emergenceofbimodalmotilityinactivedroplets
_version_	1718392587137581056

Emergence of Bimodal Motility in Active Droplets

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