Hydroxyapatite nanoparticles were synthesized, using a wet chemical technique with diammonium
hydrogen phosphate and calcium nitrate tetrahydrate precursors, respectively. The pH of the system
was maintained at 10.8 throughout the stirring process, by using 0.1 M sodium hydroxide. The mixture
was allowed to remain stirred overnight and a white precipitate was formed. The precipitate was
vacuum dried and cleaned with distilled water and ethanol simultaneously three or four times. The
prepared powder was used for further characterization. The prepared nano-hydroxyapatite powder was
characterized for phase composition, using X-ray diffractometry; elemental dispersive X-ray and Fourier
transform infrared spectroscopy. The elemental compositions of the nano-hydroxyapatite were
analyzed and confirmed by elemental dispersive X-ray (EDX). The particle size and morphology were
studied using the scanning electron microscope (SEM) and transmission electron microscopy (TEM).
The particle size of the nano-hydroxyapatite was also analyzed, using the dynamic light scattering
(DLS) experiment.