Document Type : Research Note
Science and Research Branch, Islamic Azad University
Biomedical Engineering Faculty Amirkabir University of Technology
Materials Science and Engineering Sharif University of Technology
Maziar University, Noor, Mazandaran
In this work, Hydroxyapatite nanorods have been successfully synthesized using cationic surfactant Cetyltrimethylammonium bromide (CTAB) and non- ionic co-surfactant polyethylene glycol 400 (PEG 400), as regulators of nucleation and crystal growth processes under hydrothermal conditions. The effect of hydrothermal temperature on the composition, morphology and size of HAp particles was studied using X-ray diffraction (XRD), Fourier transform infrared spectrometer (FTIR), and scanning electron microscopy (SEM). Results revealed that the morphology and size of HAp particles could be effectively controlled using the template and co-template actions of CTAB and PEG under hydrothermal conditions. In addition, the temperature of hydrothermal treatment plays an important role in controlling the morphology and size of HAp particles. At 90 $^\circ$C, plate-like structure and rod-like particles randomly distributed in the sample are produced, and at 120 $^\circ$C, the resultant shows rod-like particles with a mean aspect ratio of about 8-10. With the increase of hydrothermal temperature to 150 $^\circ$C, the aspect ratio of rod-like particles increases to 16-20; moreover, the crystallinity of HAp powders enhances. In addition, the phase composition and morphology of HAp nanorods obtained at a higher hydrothermal temperature show higher thermal stability.