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arXiv · 1612.02409

Van der Waals interaction between a moving nano-cylinder and a liquid thin film

René Ledesma-Alonso·Elie Raphaël·Thomas Salez·Philippe Tordjeman·Dominique Legendre
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Abstract

We study the static and dynamic interaction between a horizontal cylindrical nano-probe and a thin liquid film. The effects of the physical and geometrical parameters, with a special focus on the film thickness, the probe speed, and the distance between the probe and the free surface are analyzed. Deformation profiles have been computed numerically from a Reynolds lubrication equation, coupled to a modified Young-Laplace equation, which takes into account the probe/liquid and the liquid/substrate non-retarded van der Waals interactions. We have found that the film thickness and the probe speed have a significant effect on the threshold separation distance below which the jump-to-contact instability is triggered. These results encourage the use of horizontal cylindrical nano-probes to scan thin liquid films, in order to determine either the physical or geometrical properties of the latter, through the measurement of interaction forces.

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René Ledesma-Alonso, Elie Raphaël, Thomas Salez, Philippe Tordjeman, Dominique Legendre. 2016-12-07. Van der Waals interaction between a moving nano-cylinder and a liquid thin film. https://arxiv.org/abs/1612.02409

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