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Nanostructured antireflective and thermoisolative cicada wings Morikawa, J, Ryu, M, Seniutinas, G, Balčytis, A, Maximova, K, Wang, X, Zamengo, M, Ivanova, E and Juodkazis, S 2016, 'Nanostructured antireflective and thermoisolative cicada wings', Langmuir, vol. 32, no. 18, pp. 4698-4703. Document type: Journal Article Collection: Journal Articles Title Nanostructured antireflective and thermoisolative cicada wings Author(s) Morikawa, J Ryu, M Seniutinas, G Balčytis, A Maximova, K Wang, X Zamengo, M Ivanova, E Juodkazis, S Year 2016 Journal name Langmuir Volume number 32 Issue number 18 Start page 4698 End page 4703 Total pages 6 Publisher American Chemical Society Abstract Inter-related mechanical, thermal, and optical macroscopic properties of biomaterials are defined at the nanoscale by their constituent structures and patterns, which underpin complex functions of an entire bio-object. Here, the temperature diffusivity of a cicada (Cyclochila australasiae) wing with nanotextured surfaces was measured using two complementary techniques: a direct contact method and IR imaging. The 46-μm-thick wing section was shown to have a thermal diffusivity of α⊥ = (0.71 ± 0.15) × 107 m2/s, as measured by the contact temperature wave method along the thickness of the wing; it corresponds to the inherent thermal property of the cuticle. The in-plane thermal diffusivity value of the wing was determined by IR imaging and was considerably larger at α∥ = (3.6 ± 0.2) × 107 m2/s as a result of heat transport via air. Optical properties of wings covered with nanospikes were numerically simulated using an accurate 3D model of the wing pattern and showed that light is concentrated between spikes where intensity is enhanced by up to 3- to 4-fold. The closely packed pattern of nanospikes reduces the reflectivity of the wing throughout the visible light spectrum and over a wide range of incident angles, hence acting as an antireflection coating. Subject Microbiology not elsewhere classified DOI - identifier 10.1021/acs.langmuir.6b00621 Copyright notice © 2016 American Chemical Society ISSN 0743-7463 Related Links Link Description https://dx.doi.org/10.1021/acs.langmuir.6b00621 Link to Published Version   Versions Version Filter Type Thu, 25 Oct 2018, 08:09:01 EST Filtered Full Citation counts:   Cited 20 times in Thomson Reuters Web of Science Article | Citations Cited 0 times in Scopus Article Altmetric details: Access Statistics: 45 Abstract Views  -  Detailed Statistics Created: Tue, 23 Oct 2018, 16:00:00 EST by Catalyst Administrator