Nanoporous Gold Film Prepared by the Epoxidation of Poly(styrene‐b‐butadiene) Diblock Copolymer Templated Micelles

Abstract

A new approach is developed for the preparation of nanoporous gold (Au) fi lms 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 tetrahydrofuranacetonitrile 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 fi lms. After the pyrolysis of the diblock copolymer templates at a specifi c temperature to avoid the collapse of the Au NPs, a nanoporous Au fi lm is prepared. THF/CH3CN =1/2 80 ⁰C 3days SH H2N 4-ATP PS DMAP Au nps PS-b-PBO Spherical micelle 4-ATP in corona of micelle DMAP Au nps In corona Thermal treatment Nanoporous Gold