| Issue |
Europhys. Lett.
Volume 72, Number 4, November 2005
|
|
|---|---|---|
| Page(s) | 597 - 603 | |
| Section | Condensed matter: structural, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2005-10271-3 | |
| Published online | 12 October 2005 | |
Coalescence of droplets on chemical boundaries
Department of Materials, Oxford University - Oxford OX1 3PH, UK
Corresponding author: julien.leopoldes@umh.ac.be
Received:
22
June
2005
Accepted:
19
September
2005
We show that emulsion droplets sedimenting toward a chemically patterned substrate can self-assemble and coalesce onto chemical boundaries, leading to a 2D growth pattern. After discussing the various features characteristic of the self-assembly process, we focus on the behaviour of a single droplet when sliding from a high contact angle area to a low contact angle area. The adsorption on the low contact angle area shall occur via two main mechanisms, depending on the interplay between droplet dynamics and wettability contrast.
PACS: 68.08.Bc – Surfaces and interfaces; thin films and low-dimensional systems (structure and nonelectron properties): Wetting / 61.30.Hn – Surface phenomena: alignment, anchoring, anchoring transitions, surface-induced layering, surface-induced ordering, wetting, prewetting transitions, and wetting transitions
© EDP Sciences, 2005
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