Figure 2: Crystal properties and morphology of different ZnO nanocrystals.

(a) XRD patterns of ZnO nanocrystals obtained using different heat treatments. (b,d) TEM images and (c,e) high-resolution TEM images of ZnO-650/400 samples and ZnO-300/100–650/200 samples; insets are the corresponding SAED patterns. Polycrystalline characteristic of wurtzite ZnO phase can be confirmed by the SAED patterns.