Annealing Effect on Reversible Photochromic Properties of Ag@TiO_2 Nanocomposite Film

摘要

Large-scale uniform Ag@TiO_2 films was prepared by RF magnetron sputtering in pure Ar plasma using polycrystalline TiO_2 semiconductor sintered target. The effect of annealing on the photochromic properties was studied to obtain a better understanding of the interaction of the structure. Ultraviolet-visible absorption and scanning electron microscopy were performed to investigate the possibility of tailoring the structure with consequent modification of the optical properties. Ag nanoparticles were formed between TiO_2 films after annealing the samples with Ag film structure. The annealed Ag@TiO_2 films present a photochromic property in comparison with the as-prepared samples. Such nanocomposite films can be used as smart windows, high density multiwavelength optical memory and rewritable electronic paper.