Large-area inverted photonic crystals of SnS2 are prepared here by infilling poly(methylmethacrylate) (PMMA) opaline thin films with SnS2 by chemical vapor deposition. Dissolution of the polymer beads leaves a large inverted replica with good optical properties (see Figure), owing to the high bulk refractive index and wide electronic gap of the material.
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Müller et al. (2000) studied this question.