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The impact of surface geometry, cavitation, and condensation on wetting transitions: posts and reentrant structures

Panter, J.R.; Kusumaatmaja, H.

The impact of surface geometry, cavitation, and condensation on wetting transitions: posts and reentrant structures Thumbnail


Authors

J.R. Panter



Abstract

The fundamental impacts of surface geometry on the stability of wetting states, and the transitions between them are elucidated for square posts and reentrant structures in three dimensions. We identify three principal outcomes of particular importance for future surface design of liquid-repellent surfaces. Firstly, we demonstrate and quantify how capillary condensation and vapour cavitation affect wetting state stabilities. At high contact angles, cavitation is enhanced about wide, closely-spaced square posts, leading to the existence of suspended states without an associated collapsed state. At low contact angles, narrow reentrant pillars suppress condensation and enable the suspension of even highly wetting liquids. Secondly, two distinct collapse mechanisms are observed for 3D reentrant geometries, base contact and pillar contact, which are operative at different pillar heights. As well as morphological differences in the interface of the penetrating liquid, each mechanism is affected differently by changes in the contact angle with the solid. Finally, for highly-wetting liquids, condensates are shown to critically modify the transition pathways in both the base contact and pillar contact modes

Citation

Panter, J., & Kusumaatmaja, H. (2017). The impact of surface geometry, cavitation, and condensation on wetting transitions: posts and reentrant structures. Journal of Physics: Condensed Matter, 29(8), Article 084001. https://doi.org/10.1088/1361-648x/aa5380

Journal Article Type Article
Acceptance Date Dec 13, 2016
Online Publication Date Jan 16, 2017
Publication Date Jan 16, 2017
Deposit Date Mar 7, 2017
Publicly Available Date Mar 29, 2024
Journal Journal of Physics: Condensed Matter
Print ISSN 0953-8984
Electronic ISSN 1361-648X
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 29
Issue 8
Article Number 084001
DOI https://doi.org/10.1088/1361-648x/aa5380
Related Public URLs https://arxiv.org/abs/1609.00287

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Accepted Journal Article (3.1 Mb)
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Copyright Statement
This is an author-created, un-copyedited version of an article published in Journal of physics : condensed matter. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1361-648X/aa5380





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