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The collapse transition on superhydrophobic surfaces

Abstract:

We investigate the transition between the Cassie-Baxter and Wenzel states of a slowly evaporating, micron-scale drop on a superhydrophobic surface. In two dimensions analytical results show that there are two collapse mechanisms. For long posts the drop collapses when it is able to overcome the free-energy barrier presented by the hydrophobic posts. For short posts, as the drop loses volume, its curvature increases allowing it to touch the surface below the posts. We emphasise the importance ...

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Publication status:
Published

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Publisher copy:
10.1209/0295-5075/81/36003

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
Journal:
EPL More from this journal
Volume:
81
Issue:
3
Pages:
36003-36003
Publication date:
2008-01-01
DOI:
EISSN:
1286-4854
ISSN:
0295-5075
Language:
English
Pubs id:
pubs:17460
UUID:
uuid:0c8d8b6c-3639-4fcb-8c20-b46ffc16fcfd
Local pid:
pubs:17460
Source identifiers:
17460
Deposit date:
2012-12-19

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