Figure 3 . Changes of CD and UV-vis spectra of CABu/PMMAzo-1 composite films (a) before annealing as prepared films at room temperature and (b) after termal annealing at 80 °C for 10 min. (c) A comparison of the correspomding g CD values for the CABu/PMMAzo-1 composite films before and after the annealing. (d) Photographs of the CABu/PMMAzo-1 composite films. The mass ratio of CABu/PMMAzo-1 is 1:1 (red), 2:1 (blue), 3:1 (yellow), and 4:1 (green), respectively.