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Bioinspired ultraviolet reflective photonic structures derived from butterfly wings (Euploea)
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Optical photographs of natural butterflies wings (a1) without and (a2) with ethanol wetting; (b) Reflection spectra of the wings; ((c)-(e)) FESEM images: (c) covered scales in a regular “tiles on a roof” pattern, the inset showing the optical reflection microphotographs of the scales, (d) the longitudinal uniform-spaced ridges frequently connected by so called cross-ribs, the inset showing the solid interior of the scaffolds, and (e) the parallel lamellae of four shelves stacked on a ridge and micro-ribs between the lamellae.

Image of FIG. 2.
FIG. 2.

(Color online) (a) XRD pattern, (b) EDX spectra, (c) reflection microphotograph, the inset showing a much flatter SnO2 scale, (d) FESEM image, and (e) TEM image of SnO2 replicas, the inset in (d) showing the hollow interiors of the scaffolds, and (f) reflection spectra of SnO2 replicas PS and NP.

Image of FIG. 3.
FIG. 3.

(Color online) (a) A simple model dividing the transformation of the multilayer structures into two separate steps of (I) the ingredients replacement and (II) the dimensional shrinkage; FESEM image of ridges on (b) natural wings and (c) SnO2 replicas PS, the dimensional contrast is used to estimate the shrinkage value.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Bioinspired ultraviolet reflective photonic structures derived from butterfly wings (Euploea)