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  Interface-mediated spontaneous symmetry breaking and mutual communication between drops containing chemically active particles

Singh, D. P., Domínguez, A., Choudhury, U., Kottapalli, S. N., Popescu, M. N., Dietrich, S., et al. (2020). Interface-mediated spontaneous symmetry breaking and mutual communication between drops containing chemically active particles. Nature Communications, 11: 2210, pp. 1-8. doi:10.1038/s41467-020-15713-y.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000B-36BC-5 Version Permalink: https://hdl.handle.net/21.11116/0000-000E-4C3D-A
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 Creators:
Singh, D. P., Author
Domínguez, A., Author
Choudhury, U., Author
Kottapalli, S. N., Author
Popescu, M. N., Author
Dietrich, S., Author
Fischer, P.1, Author                 
Affiliations:
1Max Planck Institute for Medical Research, Max Planck Society, ou_1125545              

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 Abstract: Symmetry breaking and the emergence of self-organized patterns is the hallmark of complexity. Here, we demonstrate that a sessile drop, containing titania powder particles with negligible self-propulsion, exhibits a transition to collective motion leading to self-organized flow patterns. This phenomenology emerges through a novel mechanism involving the interplay between the chemical activity of the photocatalytic particles, which induces Marangoni stresses at the liquid–liquid interface, and the geometrical confinement provided by the drop. The response of the interface to the chemical activity of the particles is the source of a significantly amplified hydrodynamic flow within the drop, which moves the particles. Furthermore, in ensembles of such active drops long-ranged ordering of the flow patterns within the drops is observed. We show that the ordering is dictated by a chemical communication between drops, i.e., an alignment of the flow patterns is induced by the gradients of the chemicals emanating from the active particles, rather than by hydrodynamic interactions.

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Language(s): eng - English
 Dates: 2019-07-132020-03-202020-05-05
 Publication Status: Published online
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/s41467-020-15713-y
BibTex Citekey: 2020Singh
 Degree: -

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
 Creator(s):
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 11 Sequence Number: 2210 Start / End Page: 1 - 8 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723