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Electroosmosis near surfactant laden liquid-air interfaces

Abstract

Generation of an electroosmostic (EO) flow near a liquid-gas interface covered with ionic surfactants is experimentally investigated. Combination of microscopic flow measurements with a molecular characterization of the interface by second harmonic generation (SHG) shows that, under an electrical forcing, although a liquid flow is generated below the free surface, the surfactants remain immobile. The zeta potential was then determined and compared to surfactant surface coverage. This combination of experimental techniques opens the route to simultaneously probe the liquid flow near a soapy interface and the corresponding surfactant repartition affecting the hydrodynamic boundary condition.

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Publication details

The article was received on 21 Dec 2017, accepted on 04 Feb 2018 and first published on 09 Feb 2018


Article type: Paper
DOI: 10.1039/C7SM02508D
Citation: Soft Matter, 2018, Accepted Manuscript
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    Electroosmosis near surfactant laden liquid-air interfaces

    B. Blanc, O. Bonhomme, C. Ybert, E. Benichou, P. Brevet and A. Biance, Soft Matter, 2018, Accepted Manuscript , DOI: 10.1039/C7SM02508D

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