Retracted Article: A surfactant-free co-assembly route to fabricate 2D TiO2–WO3 composite inverse opal films for photochromic applications

Abstract

2D TiO₂–WO₃ composite inverse opal (IO) films on ITO substrates were prepared by using a surfactant-free co-assembly route using a template of polystyrene (PS) spheres with a diameter of 900 nm. Thus obtained TiO₂–WO₃ composite IO films were dye sensitized for the construction of photochromic devices which exhibited good photochromic properties.