title: Influence of surface roughness on superhydrophobicity.
abstract: Superhydrophobic surfaces, with a liquid contact angle theta greater than 150 degrees , 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 a 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.
authors.affiliation: IFF, FZ-Jülich, 52425 Jülich, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Yang
authors.forename: U
authors.initials: U
authors.lastname: Tartaglino
authors.forename: B N J
authors.initials: BN
authors.lastname: Persson