Au–Cu alloy bridged synthesis and optoelectronic properties of Au@CuInSe 2 core–shell hybrid nanostructures

Based on alloying Cu with Au on the surface of Au nanoparticles (NPs) and using the Au–Cu alloy as a bridge, a multi-step colloid process was successfully developed to prepare Au@CuInSe2 hybrid nanostructures. It has been demonstrated that the as-prepared hybrid nanostructures exhibit excellent optoelectronic properties due to the surface plasmon resonance (SPR) properties of the Au core and the coupling between the Au core and CuInSe2 shell in the Au@CuInSe2 core–shell nanostructure.