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Автор Sun, Mingxia
Автор Liang, Aiping
Автор Zheng, Yongmei
Автор Watson, Gregory S
Автор Watson, Jolanta A
Дата выпуска 2011-06-01
dc.description The dependence of optical reflectivity and wettability on the surface topography of 32 species of cicada wing membranes has been investigated using UV-visible spectrophotometry, contact angle measurements and environmental scanning electron microscopy. The nanoscale hexagonally close packed protrusions have been shown to exhibit an anti-reflection and in some cases an anti-wetting function. The parameters of the structures were measured to be 77–148 nm in diameter, 44–117 nm in spacing and 159–481 nm in height. The transmittance spectrum and static contact angles were measured. At a wavelength range of 500–2500 nm, only minor differences in the anti-reflection performance were observed for each cicada species ascribed to the mechanism of impedance matching between cuticle and air. The transmittance properties of cicada wings were altered successfully through the scanning probe microscope-based manipulation by reducing the protrusion height via the contact mode. A near linear dependence was found between a decrease in protuberance height and a resulting increase in reflectance intensity. A diversity of wettability was observed with contact angles varying from 56.5° to 146.0°. Both effects of anti-reflection and wettability are dependent on the height of protrusions. The anti-reflection is insensitive when the wavelength is larger than the lateral feature size of the nanostructure. The stronger hydrophobic properties are generally associated with a larger diameter, closer spacing and greater height of protrusions when the wing membrane is intact.
Формат application.pdf
Издатель Institute of Physics Publishing
Копирайт 2011 IOP Publishing Ltd
Название A study of the anti-reflection efficiency of natural nano-arrays of varying sizes
Тип paper
DOI 10.1088/1748-3182/6/2/026003
Print ISSN 1748-3190
Журнал Bioinspiration & Biomimetics
Том 6
Первая страница 26003
Последняя страница 26011
Аффилиация Sun, Mingxia; Key Laboratory of the Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, 100101 Beijing, People's Republic of China
Аффилиация Liang, Aiping; Key Laboratory of the Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, 100101 Beijing, People's Republic of China;
Аффилиация Zheng, Yongmei; School of Chemistry and Environment, Beihang University, 100191 Beijing, People's Republic of China;
Аффилиация Watson, Gregory S; School of Pharmacy and Molecular Sciences, James Cook University, Townsville, 4811 QLD, Australia
Аффилиация Watson, Jolanta A; School of Pharmacy and Molecular Sciences, James Cook University, Townsville, 4811 QLD, Australia
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