Influence of surface roughness on superhydrophobicity
Abstract
Superhydrophobic surfaces, with liquid contact angle theta greater than 150 degree, have important practical applications ranging from self-cleaning window glasses, paints, and fabrics to low-friction surfaces. Many biological surfaces, such as the lotus leaf, have hierarchically structured surface roughness which is optimized for superhydrophobicity through natural selection. Here we present a molecular dynamics study of liquid droplets in contact with self-affine fractal surfaces. Our results indicate that the contact angle for nanodroplets depends strongly on the root-mean-square surface roughness amplitude but is nearly independent of the fractal dimension D_f of the surface.
Keywords
Cite
@article{arxiv.cond-mat/0604052,
title = {Influence of surface roughness on superhydrophobicity},
author = {C. Yang and U. Tartaglino and B. N. J. Persson},
journal= {arXiv preprint arXiv:cond-mat/0604052},
year = {2007}
}
Comments
5 Pages, 6 figures. Minimal changes with respect to the previous version