| 초록 |
The precise control of the size, morphology and composition of nanoscale objects represent a powerful approach for producing materials with outstanding properties. For instance, heterogeneous nanomaterials with well-defined structures consisting of different metal nanoparticle, i.e. gold and silver nanoparticles have been extensively explored because of their distinctive properties, leading to their enormous applications in many fields such as catalysis, photothermal therapy, and tissue imaging. Herein, we prepare heterogeneous metal nanoparticle assemblies by exploiting the mussel-inspired polydopamine (PDA) approach. We modified the surface of Au NPs with a nanolayer of PDA under alkaline condition. Thus, PDA layer can serve as reduction agent for in situ generation of Ag NPs on the surface of PDA-modified Au NP. In addition, we further investigated the photocatalytic activity of the final assemblies for the reduction of 4-nitrophenol in the presence of excess sodium borohydride. |
