Topography driven spreading

McHale, G., Shirtcliffe, N.J., Aqil, S., Perry, C.C. ORCID: 0000-0003-1517-468X and Newton, M.I. ORCID: 0000-0003-4231-1002, 2004. Topography driven spreading. Physical Review Letters, 93 (3): 036102. ISSN 0031-9007

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Roughening a hydrophobic surface enhances its non-wetting properties into superhydrophobicity. For liquids other than water, roughness can induce a complete roll-up of a droplet. However, topographic effects can also enhance partial wetting by a given liquid into complete wetting to create super-wetting. In this work, a model system of spreading droplets of a non-volatile liquid on surfaces having lithographically produced pillars is used to show that super-wetting also modifies the dynamics of spreading. The edge speed-dynamic contact angle relation is shown to obey a simple power-law and such power laws are shown to apply to naturally occurring surfaces.

Item Type: Journal article
Description: Post-print
Publication Title: Physical Review Letters
Creators: McHale, G., Shirtcliffe, N.J., Aqil, S., Perry, C.C. and Newton, M.I.
Publisher: American Physical Society
Place of Publication: College Park, Md.
Date: 2004
Volume: 93
Number: 3
ISSN: 0031-9007
Rights: Copyright ©2004 The American Physical Society
Divisions: Schools > School of Science and Technology
Record created by: EPrints Services
Date Added: 09 Oct 2015 10:52
Last Modified: 12 Aug 2022 09:22

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