Kovalev, Alexander E., Varenberg, Michael and Gorb, Stanislav N. (2012) Wet versus dry adhesion of biomimetic mushroom-shaped microstructures. Soft Matter, 8 (29). pp. 7560-7566. DOI 10.1039/c2sm25431j.

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Abstract

Currently, biomimetic geometry-controlled adhesives are based mostly on dry adhesion, whereas the majority of adhesive systems in biology involve fluids. Here, we assess the influence of the presence of oil on a pull-off force measured in a flat-on-flat contact between a mushroom-shaped microstructured adhesive and chemically identical smooth and rough substrates. A microstructured surface has stronger adhesion compared to a smooth control on both smooth and rough substrates in both dry and oiled contacts. In the presence of oil, the microstructured surface has stronger adhesion on both smooth and rough substrates compared to the dry contact. We found that, after detachment from the substrate, a microstructured surface retains fluid more effectively compared to the smooth control. The study demonstrates that covering an adhesive microstructure with an oil film may expand its application range, showing that this method is potentially attractive for the creation of new biomimetic adhesives.

Document Type:	Article
Research affiliation:	OceanRep > The Future Ocean - Cluster of Excellence
Refereed:	Yes
Open Access Journal?:	No
Publisher:	Nature Publishing Group
Projects:	Future Ocean
Date Deposited:	14 May 2014 09:53
Last Modified:	31 Jul 2019 05:58
URI:	https://oceanrep.geomar.de/id/eprint/24072

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