Nanoporous gold film prepared by the epoxidation of poly(styrene-b- butadiene) diblock copolymer templated micelles

A new approach is developed for the preparation of nanoporous gold (Au) films using diblock copolymer micelles as templates. Stable Au nanoparticles (NPs) with a narrow distribution are prepared by modifying NPs functionalized with 4-(dimethylamino)pyridine ligands (DMAP Au NPs) and a spherical micelle formed through the epoxidation of poly(styrene-b-butadiene) diblock copolymer to produce poly(styrene-b-vinyl oxirane) (PS-b-PBO) in tetrahydrofuran- acetonitrile solution. The exchange reaction of 4-aminothiophenol of PS-b-PBO diblock copolymer micelles with DMAP Au NPs can produce block copolymer-Au NPs composite films. After the pyrolysis of the diblock copolymer templates at a specific temperature to avoid the collapse of the Au NPs, a nanoporous Au film is prepared.