Abstract
Gold nanoparticles synthesized by the chemical reduction of hydrogen tetrachloroaurate were used to modify the surface of vacuum evaporated WO 3 thin films through a spin coating technique. It was found that the gold nanoparticles could improve the electrochromic performance of the WO 3 film greatly. The experimental results indicated that the conductivity of the thin film was increased after the surface modification. In addition, it was found that the composite thin film could show a better electrochromic performance in aqueous acid system than in organic solution.
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