Size dependent motion of nanodroplets on chemical steps

Details Size dependent motion of nanodroplets on chemical steps Size dependent motion of nanodroplets on chemical steps

2008-05-05

arxiv.org/abs/0805.0506v1

Physics

Condensed Matter

Soft Condensed Matter

13 pages, 4 figures

Scientific paper

10.1063/1.2955860

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 their small size nano-droplets do not sample the disjoining pressure at all distances from the substrate, can lead to droplet motion towards the less wettable part of the substrate, i.e., in the direction opposite to the one expected on the basis of macroscopic wettability considerations.

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