Roughness Versus Chemistry: Effect of Different Surface Properties on Insect Adhesion

Gorb, Elena V., England, Matt W., Sato, Tomoya, Yagihashi, Makoto, Hozumi, Atsushi and Gorb, Stanislav (2017) Roughness Versus Chemistry: Effect of Different Surface Properties on Insect Adhesion Bio-inspired Structured Adhesives. Springer, Cham, pp. 33-46. DOI 10.1007/978-3-319-59114-8_3.

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Supplementary data:

Abstract

In order to study the effect of different surface properties on the attachment ability of seven-spotted ladybird beetles Coccinella septempunctata, traction forces of both male and female beetles were systematically measured on eight types of surface, each with different chemical and topographical properties. Three of these surfaces were smooth with different surface wettabilities, including two types of hydrophobic monolayers, with alkyl- and perfluoroalkyl-terminated functional groups. The third smooth surface was a hydrophobic/oleophilic alkylsilane-derived hybrid film, showing low contact angle hysteresis for water and n-hexadecane. In addition, we also tested three rough surfaces with different roughness values and different wettabilities. Smooth, hydrophilic silicon wafers (Si) and glass surfaces were used as two reference surfaces. The results of traction force tests clearly demonstrated that chemical surface properties, such as static/dynamic dewettability of water and oil caused by specific chemical compositions, had a certain effect on the beetle attachment: hydrophobic and oleophobic substrates tend to reduce the attachment forces. Surface roughness was found to be the dominant factor, strongly affecting the attachment ability of the beetles up to complete diminishing of attachment.

Document Type: Book chapter
Research affiliation: Kiel University > Kiel Marine Science
Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1007/978-3-319-59114-8_3
ISSN: 2211-0593
Date Deposited: 18 Dec 2017 11:11
Last Modified: 18 Dec 2017 11:11
URI: http://eprints.uni-kiel.de/id/eprint/40741

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