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Symmetrical Catalytic Colloids Display Janus‐Like Active Brownian Particle Motion

Catalytic Janus colloids, with one hemi‐sphere covered by a hydrogen peroxide reduction catalyst such as platinum, represent one of the most experimentally explored examples of self‐motile active colloid systems. This paper comparatively investigates the motile behavior of symmetrical catalytic coll...

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Detalles Bibliográficos
Autores principales: Archer, Richard J., Ebbens, Stephen J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10667803/
https://www.ncbi.nlm.nih.gov/pubmed/37870200
http://dx.doi.org/10.1002/advs.202303154
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author Archer, Richard J.
Ebbens, Stephen J.
author_facet Archer, Richard J.
Ebbens, Stephen J.
author_sort Archer, Richard J.
collection PubMed
description Catalytic Janus colloids, with one hemi‐sphere covered by a hydrogen peroxide reduction catalyst such as platinum, represent one of the most experimentally explored examples of self‐motile active colloid systems. This paper comparatively investigates the motile behavior of symmetrical catalytic colloids produced by a solution‐based metal salt reduction process. Despite the significant differences in the distribution of catalytic activity, this study finds that the motion produced by symmetrical colloids is equivalent to that previously reported for Janus colloids. It also shows that introducing a Janus structure to the symmetrical colloids via masking does not significantly modify their motion. These findings could indicate that very subtle variations in surface reactivity can be sufficient to produce Janus‐like active Brownian particle‐type motion, or that a symmetry‐breaking phenomena is present. The study will consequently motivate fresh theoretical attention and also demonstrate a straightforward route to access large quantities of motile active colloids, which are expected to show subtly different phenomenology compared to those with Janus structures.
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spelling pubmed-106678032023-10-23 Symmetrical Catalytic Colloids Display Janus‐Like Active Brownian Particle Motion Archer, Richard J. Ebbens, Stephen J. Adv Sci (Weinh) Research Articles Catalytic Janus colloids, with one hemi‐sphere covered by a hydrogen peroxide reduction catalyst such as platinum, represent one of the most experimentally explored examples of self‐motile active colloid systems. This paper comparatively investigates the motile behavior of symmetrical catalytic colloids produced by a solution‐based metal salt reduction process. Despite the significant differences in the distribution of catalytic activity, this study finds that the motion produced by symmetrical colloids is equivalent to that previously reported for Janus colloids. It also shows that introducing a Janus structure to the symmetrical colloids via masking does not significantly modify their motion. These findings could indicate that very subtle variations in surface reactivity can be sufficient to produce Janus‐like active Brownian particle‐type motion, or that a symmetry‐breaking phenomena is present. The study will consequently motivate fresh theoretical attention and also demonstrate a straightforward route to access large quantities of motile active colloids, which are expected to show subtly different phenomenology compared to those with Janus structures. John Wiley and Sons Inc. 2023-10-23 /pmc/articles/PMC10667803/ /pubmed/37870200 http://dx.doi.org/10.1002/advs.202303154 Text en © 2023 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Archer, Richard J.
Ebbens, Stephen J.
Symmetrical Catalytic Colloids Display Janus‐Like Active Brownian Particle Motion
title Symmetrical Catalytic Colloids Display Janus‐Like Active Brownian Particle Motion
title_full Symmetrical Catalytic Colloids Display Janus‐Like Active Brownian Particle Motion
title_fullStr Symmetrical Catalytic Colloids Display Janus‐Like Active Brownian Particle Motion
title_full_unstemmed Symmetrical Catalytic Colloids Display Janus‐Like Active Brownian Particle Motion
title_short Symmetrical Catalytic Colloids Display Janus‐Like Active Brownian Particle Motion
title_sort symmetrical catalytic colloids display janus‐like active brownian particle motion
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10667803/
https://www.ncbi.nlm.nih.gov/pubmed/37870200
http://dx.doi.org/10.1002/advs.202303154
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