摘要
Au/BaTiO 3 nanocomposite thin films with different Au concentrations were prepared by a sol-gel process. The films were characterized using X-ray diffraction, thermal analyses, X-ray absorption spectroscopy, UV-vis spectroscopy, and transmission electron microscopy. The effects of Au concentration and annealing temperature on the structural and optical properties of composite films were investigated. Gold doping lowered the crystallization temperature of as-synthesized amorphous BaTiO 3 and enhanced its crystallinity in post-deposition annealing. The Au-BaTiO 3 interface was also investigated and no alloying occurred between Au and BaTiO 3 . The evolution of Au surface plasmon resonance spectra with increasing annealing temperature was observed in the 10 mol% Au/BaTiO 3 thin films. The variations of band-gap energy for Au/BaTiO 3 films were also discussed.