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Scanning electron micrographs of the internal structures of the hypercrosslinked poly(4-methylstyrene-co-vinylbenzene chloride-co-divinylbenzene) monoliths attached with 5 (a), 10 (b), 15 (c) nm gold nanoparticles monolayer, and 10 nm gold nanoparticle dual-layer (d).
