Figure 15

(a) The phase diagrams of V-O system52; (b) The flow chart of the preparation procedure of the VO2-SiO2 composite films; (c) A relationship drawn between the annealing products and the gas flow of N2; (d) The TEM image of the VO2-SiO2 composite film (Si/V molar ratio = 0.8) and the insert image is the corresponding spectrum of this sample.