Generalized Fabrication of Multifunctional Nanoparticle Assemblies on Silica Spheres

Abstract

Sequential decoration of silica spheres by covalent bonding of magnetite nanoparticles (blue) and attachment of functional nanoparticles of Au, CdSe/ZnS, or Pd (red) afforded multifunctional assemblies exhibiting combinations of magnetism with surface plasmon resonance (Au), luminescence (CdSe/ZnS), and catalytic activity (Pd), respectively.