Fabrication of Au/SiO2 Nanocomposite Films by Self-Assembly Multilayer Method

Gold colloid was prepared by chemical reduction of hydrogen tetrachloroaurate, polyelectrolyte/gold nanoparticle/silica nanopar ticle composite films were fabricated via an electrostatic self-assembly multilayer method, and composite films of gold nanopar ticle dispersed in silica matrix were formed by heat-treating the polyelectrolyte/gold nanoparticle/silica nanoparticle composite films to eliminate the polyelectrolyte. The obtained composite films were investigated with UV-vis, TEM, AFM and XRD. Theresults show that the self-assembly multilayer method is a promising process to produce composite films of gold nanoparticledispersed in organic and/or inorganic matrixes.