Fig. 2. TEM image (a) and high-resolution TEM image (b) of the PbTiO3 prepared at pH ¼ 13.25 and hydrothermal temperature 200 ○C, the inset of (b) is the corresponding fast- Fourier transform (FFT) pattern. (c) XRD pattern of the PbTiO3 and standard XRD pattern of PbTiO3 (JCPDS no. 01-078-0298).