Motion of nanodroplets near chemical heterogeneities

Langmuir : the ACS Journal of Surfaces and Colloids
A MoosaviS Dietrich

Abstract

We investigate the dynamics of nanoscale droplets in the vicinity of chemical steps which separate parts of a substrate with different wettabilities. Due to long-ranged dispersion forces, nanodroplets positioned on one side of the step perceive the different character of the other side even at a finite distance from the step, leading to a dynamic response. The direction of the ensuing motion of such droplets depends not only on the difference between the equilibrium contact angles on these two parts but in particular on the difference between the corresponding Hamaker constants. Therefore, the motion is not necessarily directed toward the more wettable side and can also be different from that of droplets which span the step.

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Citations

Aug 7, 2008·The Journal of Chemical Physics·A MoosaviS Dietrich
Dec 30, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Noriyoshi AraiX C Zeng
Sep 5, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Christoph HonischSvetlana V Gurevich
Sep 8, 2010·Advances in Colloid and Interface Science·Moniraj Ghosh, Kathleen J Stebe
Nov 18, 2009·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A MoosaviS Dietrich
May 9, 2014·Journal of Physics. Condensed Matter : an Institute of Physics Journal·M Asgari, A Moosavi
Mar 18, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A Moosavi, A Mohammadi
Mar 5, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Bing DaiAntonio Redondo
Nov 16, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Z Barkay

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