Jump to main content
Jump to site search

Issue 24, 2014
Previous Article Next Article

Directed transport of polymer drops on vibrating superhydrophobic substrates: a molecular dynamics study

Author affiliations

Abstract

Using molecular dynamics simulations of a coarse-grained polymer liquid we investigate the transport of droplets on asymmetrically structured (saw-tooth shaped), vibrating substrates. Due to a continuous supply of power by substrate vibrations and the asymmetry of its topography, the droplets are driven in a preferred direction. We study this directed motion as a function of the size of the droplets, the linear dimensions of the substrate corrugation, and the period of vibrations. Two mechanisms of driven transport are identified: (i) one that relies on the droplet's contact lines and (ii) in a range of vibration periods, the entire contact area contributes to the driving. In this latter regime, the set-up may be used in experiments for sorting droplets according to their size. Additionally, we show that the linear dimension of the substrate corrugation affects the flux inside the droplet. While on a substrate with a fine corrugation droplets mostly slide, on a more coarsely corrugated substrate the flux may exhibit an additional rotation pattern.

Graphical abstract: Directed transport of polymer drops on vibrating superhydrophobic substrates: a molecular dynamics study

Back to tab navigation

Supplementary files

Article information


Submitted
19 Dec 2013
Accepted
20 Mar 2014
First published
20 Mar 2014

Soft Matter, 2014,10, 4373-4386
Article type
Paper

Directed transport of polymer drops on vibrating superhydrophobic substrates: a molecular dynamics study

N. Tretyakov and M. Müller, Soft Matter, 2014, 10, 4373
DOI: 10.1039/C3SM53156B

Social activity

Search articles by author

Spotlight

Advertisements