Scalable Synthesis of Ag Networks with Optimized Sub-monolayer Au-Pd Nanoparticle Covering for Highly Enhanced SERS Detection and Catalysis.

ABSTRACT: Highly porous tri-metallic Ag_xAu_yPd_z networks with a sub-monolayer bimetallic Au-Pd nanoparticle coating were synthesized via a designed galvanic replacement reaction of Ag nanosponges suspended in mixed solutions of HAuCl₄ and K₂PdCl₄. The resulting networks' ligaments have a rough surface with bimetallic nanoparticles and nanopores due to removal of Ag. The surface morphology and composition are adjustable by the temperature and mixed solutions' concentration. Very low combined Au and Pd atomic percentage (1-x) where x is atomic percentage of Ag leads to sub-monolayer nanoparticle coverings allowing a large number of active boundaries, nanopores, and metal-metal interfaces to be accessible. Optimization of the Au/Pd atomic

SUBMITTER: Li T 

PROVIDER: S-EPMC5109471 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature