3. Results and discussion
3.1. X-ray diffraction (XRD)
Fig. 3 indicates the XRD patterns of the NC powder milled for
2 h. The peak broadening can be seen with increasing milling time
which is due to the crystallite size refinement. It is also notable
that the NC powder is completely formed at 2 h of milling with a
crystallite size less than 30 nm.