title: Size dependent motion of nanodroplets on chemical steps.
abstract: Nanodroplets on chemically structured substrates move under the action of disjoining pressure induced forces. A detailed analysis of them shows that, even in the absence of long-ranged lateral variations of the effective interface potential, already the fact that due to their small size nanodroplets do not sample the disjoining pressure at all distances from the substrate can lead to droplet motion toward the less wettable part of the substrate, i.e., in the direction opposite to the one expected on the basis of macroscopic wettability considerations.
authors.affiliation: Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, D-70569 Stuttgart, Germany. moosavi@mf.mpg.de
authors.forename: A
authors.initials: A
authors.lastname: Moosavi
authors.forename: M
authors.initials: M
authors.lastname: Rauscher
authors.forename: S
authors.initials: S
authors.lastname: Dietrich
mesh_terms: D009038:Motion; D053758:Nanoparticles / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D013499:Surface Properties
chemical_list: D011137:Polystyrenes; D012822:Silicon Dioxide