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. 2020 Jun 15;117(26):14657–14666. doi: 10.1073/pnas.2001802117

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Fig. 4. — Preparation and morphology of the Bio-RC film. (A) Schematic illustration of the preparation process of the template and the hybrid film with photonic architectures. (B and C) SEM image of the fabricated inverted-micropyramid silicon template (B) and the top view of the Bio-RC film (C) via a facile microstamping method. (D) Photo of the fabricated Bio-RC film on a 30-cm-wide roll. (E) Schematic illustration of the bioinspired flexible hybrid films. Ceramic particles are embedded in the PDMS matrix filled by compact arrays of micropyramids. (F) SEM image of the section of the Bio-RC film.