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Non-contact rheology of finite-size air-water interfaces

Abstract : We present non-contact atomic-force-microscopy measurements of the hydrodynamic interactions between a rigid sphere and an air bubble in water at the microscale. The size of the bubble is found to have a significant effect on the mechanical response due to the long-range capillary deformation of the air-water interface. We develop a viscocapillary lubrication model accounting for the finite-size effect that allows to rationalize the experimental data. This comparison allows us to measure the air-water surface tension, without contact and thus wetting, paving the way towards robust non-contact tensiometry of polluted air-water interfaces.
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Contributor : Thomas Salez Connect in order to contact the contributor
Submitted on : Tuesday, September 29, 2020 - 4:09:15 PM
Last modification on : Tuesday, December 21, 2021 - 3:34:05 PM
Long-term archiving on: : Wednesday, December 30, 2020 - 7:00:15 PM


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  • HAL Id : hal-02952832, version 1
  • ARXIV : 2009.14531


Vincent Bertin, Zaicheng Zhang, Rodolphe Boisgard, Christine Grauby-Heywang, Elie Raphael, et al.. Non-contact rheology of finite-size air-water interfaces. 2020. ⟨hal-02952832v1⟩



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