Adhesion and friction of the smooth attachment system of the cockroach Gromphadorhina portentosa and the influence of the application of fluid adhesives

Biology Open
Oliver BetzChristian Schmitt

Abstract

Two different measurement techniques were applied to study the attachment of the smooth foot pads of the Madagascar hissing cockroach Gromphadorhina portentosa The attachment of the non-manipulated adhesive organs was compared with that of manipulated ones (depletion or substitution by artificial secretions). From measurements of the friction on a centrifuge, it can be concluded that on nanorough surfaces, the insect appears to benefit from employing emulsions instead of pure oils to avoid excessive friction. Measurements performed with a nanotribometer on single attachment organs showed that, in the non-manipulated euplantulae, friction was clearly increased in the push direction, whereas the arolium of the fore tarsus showed higher friction in the pull direction. The surface of the euplantulae shows an imbricate appearance, whereupon the ledges face distally, which might contribute to the observed frictional anisotropy in the push direction. Upon depletion of the tarsal adhesion-mediating secretion or its replacement by oily fluids, in several cases, the anisotropic effect of the euplantula disappeared due to the decrease of friction forces in push-direction. In the euplantulae, adhesion was one to two orders of magnitude low...Continue Reading

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Citations

Sep 10, 2019·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Walter Federle, David Labonte
May 7, 2020·Journal of the Royal Society, Interface·Antonio IazzolinoTristan Gilet
Dec 3, 2020·Bioinspiration & Biomimetics·Daiki ShimaHirotaka Sato
Jun 17, 2021·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Kathleen McCallionJacqueline Dillard

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Methods Mentioned

BETA
electrophoresis
pull-off
profiler
scanning electron

Software Mentioned

SPSS
FRT Mark III ( FRT
DSA
Aquire ( FRT
Adobe Premiere Pro
Excel
AxioVison
ImageJ

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