Issue 11, 2011

Flow triggered by instabilities at the contact line of a drop containing nanoparticles

Abstract

Mass transport in an evaporating colloidal drop is believed to occur via two flow mechanisms: capillary flow due to evaporation and Marangoni flow due to surface tension gradients. We describe a new mechanism for inward mass transport: circulatory fluid flow triggered by a series of pinning–depinning events at the contact line of a drop containing nanoparticles. This flow can be controlled by varying the nanoparticle concentration, and by tuning the solution surface tension.

Graphical abstract: Flow triggered by instabilities at the contact line of a drop containing nanoparticles

Supplementary files

Article information

Article type
Communication
Submitted
18 Jan 2011
Accepted
05 Apr 2011
First published
20 Apr 2011

Soft Matter, 2011,7, 5116-5119

Flow triggered by instabilities at the contact line of a drop containing nanoparticles

H. Li, N. Fowler, C. Struck and S. Sivasankar, Soft Matter, 2011, 7, 5116 DOI: 10.1039/C1SM05097D

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