Triangular core-shell structure Ag@AgAu

Abstract

Novel Triangular Ag@AgAu nanoparticles were synthesized in aqueous solution using a seed-mediated approach in the absence of any surfactants. The formation of the gold layer on the silver nanoprism seeds leads to structures with better stability and tunability. The triangular Ag@AgAu has been synthesized by the reduction of hydrogen tetrachloraurate onto Ag nanoprisms. This unusual structure exhibited interesting optical properties and the extinction spectra can be engineered in a broad range based upon the thickness of the outer AuAg shell.