SYNTHESIS OF YELLOWISH GREEN BIOCOMPATIBLE HYDROXYAPATITE PHOSPHOR VIA SURFACTANT ASSISTED AQUEOUS PRECIPITATION METHOD

Abstract

Terbium doped hydroxyapatite (THA), Tb:Ca10(PO4)6(OH)2 phosphors synthesized via surfactant (CTAB) assisted aqueous precipitation method. It is basically a room temperature synthesis excluding the sintering at 550o C, which was performed just for the removal of residual organic template. The phase, morphology, luminescent properties of THA powders were examined by usingX-ray diffraction, scanning electron microscopy (SEM), excitation and emission spectra. XRD analysis reveals the nanocrystalline nature of THA with crystallite size 48 nm. SEM images indicate the formationof ‘micro-cubes’ with uniform size distribution. Excitation spectra measured for THA samples by monitoring 541nm emission wavelength. Emission spectra measured for the THA samples by exciting the samples at 377 nm wavelength.The intensities of the emission peaks were found to be increasing with the increase ofterbium concentration. The Commission Internationale deI’Eclairage (CIE) chromaticity coordinates calculated for the synthesized THA phosphor, which indicate thatthe terbium doped hydroxyapatitephosphor exhibits yellowish green emission under 377 nm excitation.