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Fig. 1 Structure and absorption spectra of the P
Fig. 1 Structure and absorption spectra of the P. aristolochiae butterfly wing scales. Structure and absorption spectra of the P. aristolochiae butterfly wing scales. (A) Image of a P. aristolochiae butterfly. (B) Microscopic image of the matt black region. A gradient of blackness is observed along each scale. (C) Cross-sectional SEM image of a matt black scale. (D) SEM images of a scale from the matt black region reveal that the air-filling fraction at the apex is higher (by about +59%) than at the base. The inset in the lower left corner shows the 2D Fourier power spectrum of the corresponding nanohole array. (E) Absorption spectra measured in the apex and base of a single scale from the matt black region of P. aristolochiae. The scale apex of a single scale exhibits higher absorption than the base. Radwanul H. Siddique et al. Sci Adv 2017;3:e Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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