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Wettability Property In Natural Systems: A Case of Flying Insects

Published online by Cambridge University Press:  17 April 2018

J. Sackey ,
B.T. Sone ,
K. A. Dompreh  and
M. Maaza
J. Sackey*
Affiliation:
Nanosciences African Network (NANOAFNET), iThemba LABS, Somerset West, Western Cape Province, South Africa. University of South Africa (UNISA), Muckleneuk ridge, P.O. Box 392, Pretoria - South Africa,
B.T. Sone
Affiliation:
Nanosciences African Network (NANOAFNET), iThemba LABS, Somerset West, Western Cape Province, South Africa. Physical Chemistry, Chemistry Department, University of the Free State, P.O. Box339, Bloemfontein, Free State Province, South Africa
K. A. Dompreh
Affiliation:
Nanosciences African Network (NANOAFNET), iThemba LABS, Somerset West, Western Cape Province, South Africa. Department of Physics, University of Cape Coast, Ghana
M. Maaza
Affiliation:
Nanosciences African Network (NANOAFNET), iThemba LABS, Somerset West, Western Cape Province, South Africa. University of South Africa (UNISA), Muckleneuk ridge, P.O. Box 392, Pretoria - South Africa,
*
*(Email: juliyalley@gmail.com)
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Abstract

Recently, scientists have demonstrated that material surfaces in nature that possess special wettability properties are composed of micro- and nanostructures. In this study, we focused on the importance of surface structures in determining the wettability of wings of the flying insect species: Idea malabarica, Lucilia sericata and Chrysomya marginalis. Scanning Electron Microscopy (SEM) analysis indicates the different nano-/micro- structures identified on the wings. Surface roughness which plays a role in influencing the wettability was theoretically estimated from the SEM images. While the spherical liquid water droplets used for testing wettability were observed to float on the surface of the Idea malabarica and Lucilia sericata wings, the surface of the Chrysomya marginalis wing was made completely wet. The super-hydrophobicity of the Idea malabarica wing as compared to the near-hydrophobicity/mild hydrophilicity of the Lucilia sericata wing and the distinct hydrophilicity of the Chrysomya marginilis wing could be attributed to its complicated composition of nano-/microstructures and higher surface roughness value.

Keywords

nanostructurescanning electron microscopy (SEM)waternanoscalemorphology
Type
Articles
Information
MRS Advances , Volume 3 , Issue 42-43: African Materials Research Society 2017 , 2018 , pp. 2697 - 2703
Copyright
Copyright © Materials Research Society 2018 

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