Van der Waals interaction between a moving nano-cylinder and a liquid thin film
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.
Keywords
Cite
@article{arxiv.1612.02409,
title = {Van der Waals interaction between a moving nano-cylinder and a liquid thin film},
author = {René Ledesma-Alonso and Elie Raphaël and Thomas Salez and Philippe Tordjeman and Dominique Legendre},
journal= {arXiv preprint arXiv:1612.02409},
year = {2017}
}