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Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Nov;76(5 Pt 2):055202. Epub 2007 Nov 30.

Blebbing dynamics in an oil-water-surfactant system through the generation and destruction of a gel-like structure.

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  • 1Department of Physics, Graduate School of Science, Kyoto University and Spatio-Temporal Order Project, ICORP, JST, Kyoto 606-8502, Japan.


Interfacial dynamical blebbing of an oil droplet on an aqueous solution is reported. The oil droplet and the aqueous solution contain a fatty acid and a cationic surfactant, respectively. When the oil droplet was placed on an aqueous surface, the oil-water interface formed blebs, spherical extrusions on the oil-water interface and circular ones on the edge of the oil droplet. With increase of the concentration of the surfactant and/or the fatty acid, the generated blebs become smaller. Based on the experimental observations together with theoretical considerations, we conclude that the bleb formation is induced through generation and destruction of a gel-like intermediate phase.

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