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Marangoni-driven flower-like patterning of an evaporating drop spreading on a liquid surface

Wodlei, Florian and Sebilleau, Julien and Magnaudet, Jacques and Pimienta, Véronique Marangoni-driven flower-like patterning of an evaporating drop spreading on a liquid surface. (2018) Nature Communications, 9 (820). 1-12. ISSN 2041-1723

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Official URL: http://dx.doi.org/10.1038/s41467-018-03201-3

Abstract

Drop motility at liquid surfaces is attracting growing interest because of its potential applications in microfluidics and artificial cell design. Here we report the unique highly-ordered pattern that sets in when a millimeter-size drop of dichloromethane spreads on an aqueous substrate under the influence of surface tension, both phases containing a surfactant. Evaporation induces a Marangoni flow that forces the development of a marked rim at the periphery of the spreading film. At some point this rim breaks up, giving rise to a ring of droplets which modifies the aqueous phase properties in such a way that the film recoils. The process repeats itself, yielding regular large-amplitude pulsations. Wrinkles form at the film surface due to an evaporative instability. During the dewetting stage, they emit equally spaced radial strings of droplets which, combined with those previously expelled from the rim, make the top view of the system resemble a flower.

Item Type:Article
Additional Information:This article is licensed under a Creative Commons Attribution 4.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Thanks to Nature Publishing Group editor. The definitive version is available at https://www.nature.com/ The original PDF of the article can be found at https://www.nature.com/articles/s41467-018-03201-3#Sec24
HAL Id:hal-01717626
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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IDEX UNITI
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Deposited On:26 Feb 2018 14:40

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