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Three‐dimensional photonic crystals are fabricated from block copolymers, forming a double gyroid network structure. Further processing produces three‐dimensionally nanoporous, freestanding materials (see Figure), and allows dielectric enhancement and infiltration, which dramatically improve optical and material properties. These etched materials provide a path to highly effective photonic crystals via self‐assembly.
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Urbas et al. (2002) studied this question.
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