Topography driven spreading

McHale, Glen, Shirtcliffe, Neil, Aqil, Sanaa, Perry, Carole and Newton, Michael (2004) Topography driven spreading. Physical Review Letters, 93 (3). 036102. ISSN 0031-9007

PDF (Postprint)
Postprint_McHale_PRL_vol_93_art_036102_2004(2).pdf - Accepted Version

Download (364kB) | Preview
Official URL:


Roughening a hydrophobic surface enhances its nonwetting properties into superhydrophobicity. For liquids other than water, roughness can induce a complete rollup of a droplet. However, topographic effects can also enhance partial wetting by a given liquid into complete wetting to create superwetting. In this work, a model system of spreading droplets of a nonvolatile liquid on surfaces having lithographically produced pillars is used to show that superwetting 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: Article
Uncontrolled Keywords: water-repellent, surfaces, dynamics, roughness, contact angle, drop, wicking, hemi-wicking
Subjects: F100 Chemistry
F200 Materials Science
F300 Physics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Glen McHale
Date Deposited: 23 Aug 2012 14:19
Last Modified: 17 Dec 2023 12:50

Actions (login required)

View Item View Item


Downloads per month over past year

View more statistics