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Drying Droplets with Soluble Surfactant.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "Drying Droplets with Soluble Surfactant."

We propose a theory for the drying of liquid droplets of surfactant solutions. We show that the added surfactant hinders droplet receding and facilitates the droplet spreading, causing complex behavior of the contact line of an evaporating droplet: the contact line first recedes and then advances and finally recedes again. We also show that surfactant can change the deposition pattern from mountain-like to volcano-like and then to coffee-ring-like. Specially, when the contact line motion undergoes a clear receding-advancing transition, a two-ring pattern is formed. The mechanism of the two-ring formation is different from the stick-slip mechanism proposed previously, and may be tested experimentally.

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This article was published in the following journal.

Name: Langmuir : the ACS journal of surfaces and colloids
ISSN: 1520-5827
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