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Dynamics of anchored oscillating nanomenisci

Abstract : We present a self-contained study of the dynamics of oscillating nanomenisci anchored on nanometric topographical defects around a cylindrical nanofiber with a radius below 100 nm. Using frequency-modulation atomic force microscopy (FM-AFM), we show that the friction coefficient surges as the contact angle is decreased. We propose a theoretical model within the lubrification approximation that reproduces the experimental data and provides a comprehensive description of the dynamics of the nanomeniscus. The dissipation pattern in the vicinity of the contact line and the anchoring properties are discussed as a function of liquid and surface properties in addition to the forcing conditions.
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Submitted on : Friday, March 30, 2018 - 11:30:59 AM
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Caroline Mortagne, Kevin Lippera, Philippe Tordjeman, Michael Benzaquen, Thierry Ondarçuhu. Dynamics of anchored oscillating nanomenisci. Physical Review Fluids, American Physical Society, 2017, 2 (10), pp.102201. ⟨10.1103/PhysRevFluids.2.102201⟩. ⟨hal-01754876⟩

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