Self-Pinning on a Liquid Surface

The Journal of Physical Chemistry Letters
Charles AntoineVeronique Pimienta

Abstract

We report on the first experimental evidence of a self-pinning liquid drop on a liquid surface. This particular regime is observed for a miscible heavier oil drop (dichloromethane) deposited on an aqueous solution laden by an ionic surfactant (hexadecyltrimethylammonium bromide). Experimental characterization of the drop shape evolution coupled to particle image velocimetry points to the correlation between the drop profile and the accompanying flow field. A simple model shows that the observed pinned stage is the result of a subtle competition between oil dissolution and surfactant adsorption.

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Citations

Oct 11, 2017·Physical Chemistry Chemical Physics : PCCP·Yu-Hsuan WengYu-Jane Sheng

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