Dried marks of whisky droplets on glass. Left: Macallan; illuminated with orange-colored flashlight. Right: Glenlivet, with fluorescent polystyrene particles added. Suggested for a Synopsis in Physics and an Editors’ Suggestion.

From the article:

Controlled Uniform Coating from the Interplay of Marangoni Flows and Surface-Adsorbed Macromolecules
Hyoungsoo Kim, François Boulogne, Eujin Um, Ian Jacobi, Ernie Button, and Howard A. Stone
Phys. Rev. Lett. 116, 124501 (2016)

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