Preparation of Polyimide/Zinc Oxide Nanocomposite Films via an Ion-Exchange Technique and Their Photoluminescence Properties

Figure 5

TEM images of the PI/ZnO films obtained at 350°C/7 h. Zinc ion loadings before thermal treatment were (a) and (b) 465, (c) 611, (d) and (e) 702, and (f) 803 nmol/cm², respectively.

(a)

(b)

(c)

(d)

(e)

(f)