Self-organization of hydrophobic soil and granular surfaces

McHale, G., Shirtcliffe, N.J., Newton, M.I. ORCID: 0000-0003-4231-1002, Pyatt, F.B. and Doerr, S.H., 2007. Self-organization of hydrophobic soil and granular surfaces. Applied Physics Letters, 90 (5): 054110. ISSN 0003-6951


Download (478kB) | Preview


Soil can become extremely water repellent following forest fires or oil spillages, thus preventing penetration of water and increasing run-off and soil erosion. Here the authors show that evaporation of a droplet from the surface of a hydrophobic granular material can be an active process, lifting, self-coating and selectively concentrating small solid grains. Droplet evaporation leads to the formation of temporary liquid marbles and, as droplet volume reduces, particles of different wettability compete for water-air interfacial surface area. This can result in a sorting effect with self-organisation of a mixed hydrophobic-hydrophilic aggregate into a hydrophobic shell surrounding a hydrophilic core.

Item Type: Journal article
Description: Post-print
Publication Title: Applied Physics Letters
Creators: McHale, G., Shirtcliffe, N.J., Newton, M.I., Pyatt, F.B. and Doerr, S.H.
Publisher: American Institute of Physics
Place of Publication: Melville, NY
Date: 2007
Volume: 90
Number: 5
ISSN: 0003-6951
Rights: Copyright ©2007 American Institute of Physics
Divisions: Schools > School of Science and Technology
Record created by: EPrints Services
Date Added: 09 Oct 2015 09:43
Last Modified: 08 Sep 2022 09:21

Actions (login required)

Edit View Edit View


Views per month over past year


Downloads per month over past year