Cicada Wing Surface Topography: An Investigation into the Bactericidal Properties of Nanostructural Features

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Title: Cicada Wing Surface Topography: An Investigation into the Bactericidal Properties of Nanostructural Features
Authors: Kelleher, Susan M.
Habimana, Olivier
Lawler, J.
Casey, Eoin
et al.
Permanent link: http://hdl.handle.net/10197/7457
Date: 9-Nov-2015
Abstract: Recently, the surface of the wings of the Psaltoda claripennis cicada species has been shown to possess bactericidal properties and it has been suggested that the nanostructure present on the wings was responsible for the bacterial death. We have studied the surface-based nanostructure and bactericidal activity of the wings of three different cicadas (Megapomponia intermedia, Ayuthia spectabile and Cryptotympana aguila) in order to correlate the relationship between the observed surface topographical features and their bactericidal properties. Atomic force microscopy and scanning electron microscopy performed in this study revealed that the tested wing species contained a highly uniform, nanopillar structure on the surface. The bactericidal properties of the cicada wings were investigated by assessing the viability of autofluorescent Pseudomonas fluorescens cells following static adhesion assays and targeted dead/live fluorescence staining through direct microscopic counting methods. These experiments revealed a 20-25% bacterial surface coverage on all tested wing species; however, significant bactericidal properties were observed in the M. intermedia and C. aguila species as revealed by the high dead:live cell ratio on their surfaces. The combined results suggest a strong correlation between the bactericidal properties of the wings and the scale of the nanotopography present on the different wing surfaces.
Funding Details: European Research Council
Science Foundation Ireland
Type of material: Journal Article
Publisher: American Chemical Society
Copyright (published version): 2015 American Chemical Society
Keywords: Bactericidal;Nanostructures;Cicada;Surface science;Topography
DOI: 10.1021/acsami.5b08309
Language: en
Status of Item: Peer reviewed
Appears in Collections:Chemical and Bioprocess Engineering Research Collection

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