Scalable Routes to Janus Au−SiO2and Ternary Ag−Au−SiO2Nanoparticles

Segregated ligand coordination on the Au surface was utilized to direct anisotropic silica deposition and generate Janus Au−SiO2 nanoparticles; subsequent growth of Ag selectively on the exposed Au surface led to ternary structures of Ag−Au−SiO2, where the Ag block was either a nanosphere or a nanorod.