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Cross-section SEM images displaying (a) a 2-µm long as-grown Si NWs obtained by AgNO3 MACE, (b) a core-shell Si NWs/CuI heterostructure realized by chemical bath deposition for 20 min in a 63 mM solution of CuI diluted in acetonitrile, and (c) the Si NWs/CuI heterostructure obtained after both chemical bath deposition and airbrush spray coating.
