Clustering-induced self-propulsion of isotropic autophoretic particles

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Clustering-induced self-propulsion of isotropic autophoretic particles. / Varma, Akhil; Montenegro-Johnson, Thomas; Michelin, Sebastien.

In: Soft Matter, Vol. 14, No. 35, 21.09.2018, p. 7155-7173.

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Varma, Akhil ; Montenegro-Johnson, Thomas ; Michelin, Sebastien. / Clustering-induced self-propulsion of isotropic autophoretic particles. In: Soft Matter. 2018 ; Vol. 14, No. 35. pp. 7155-7173.

Bibtex

@article{a2429bfdc624403fabe3e9c0d3efb57c,
title = "Clustering-induced self-propulsion of isotropic autophoretic particles",
abstract = "Self-diffusiophoretic particles exploit local concentration gradients of a solute species in order to self-propel at the micron scale. While an isolated chemically- and geometrically-isotropic particle cannotswim, we show that it can achieve self-propulsion through interactions with other individually-non-motile particles by forming geometrically-anisotropic clusters via phoretic and hydrodynamic interactions. This result identifies a new route to symmetry-breaking for the concentration field and to self-propulsion, that is not based on an anisotropic design, but on the collective dynamics of identical and homogeneous active particles. Using full numerical simulations as well as theoretical modelling of the clustering process, the statistics of the propulsion properties are obtained for arbitrary initial arrangement of the particles. The robustness of these results to thermal noise, and more generally the effect of Brownian motion of the particles, is also discussed.",
author = "Akhil Varma and Thomas Montenegro-Johnson and Sebastien Michelin",
year = "2018",
month = sep,
day = "21",
doi = "10.1039/C8SM00690C",
language = "English",
volume = "14",
pages = "7155--7173",
journal = "Soft Matter",
issn = "1744-683X",
publisher = "Royal Society of Chemistry",
number = "35",

}

RIS

TY - JOUR

T1 - Clustering-induced self-propulsion of isotropic autophoretic particles

AU - Varma, Akhil

AU - Montenegro-Johnson, Thomas

AU - Michelin, Sebastien

PY - 2018/9/21

Y1 - 2018/9/21

N2 - Self-diffusiophoretic particles exploit local concentration gradients of a solute species in order to self-propel at the micron scale. While an isolated chemically- and geometrically-isotropic particle cannotswim, we show that it can achieve self-propulsion through interactions with other individually-non-motile particles by forming geometrically-anisotropic clusters via phoretic and hydrodynamic interactions. This result identifies a new route to symmetry-breaking for the concentration field and to self-propulsion, that is not based on an anisotropic design, but on the collective dynamics of identical and homogeneous active particles. Using full numerical simulations as well as theoretical modelling of the clustering process, the statistics of the propulsion properties are obtained for arbitrary initial arrangement of the particles. The robustness of these results to thermal noise, and more generally the effect of Brownian motion of the particles, is also discussed.

AB - Self-diffusiophoretic particles exploit local concentration gradients of a solute species in order to self-propel at the micron scale. While an isolated chemically- and geometrically-isotropic particle cannotswim, we show that it can achieve self-propulsion through interactions with other individually-non-motile particles by forming geometrically-anisotropic clusters via phoretic and hydrodynamic interactions. This result identifies a new route to symmetry-breaking for the concentration field and to self-propulsion, that is not based on an anisotropic design, but on the collective dynamics of identical and homogeneous active particles. Using full numerical simulations as well as theoretical modelling of the clustering process, the statistics of the propulsion properties are obtained for arbitrary initial arrangement of the particles. The robustness of these results to thermal noise, and more generally the effect of Brownian motion of the particles, is also discussed.

U2 - 10.1039/C8SM00690C

DO - 10.1039/C8SM00690C

M3 - Article

VL - 14

SP - 7155

EP - 7173

JO - Soft Matter

JF - Soft Matter

SN - 1744-683X

IS - 35

ER -