Accelerated sonochemical synthesis of calcium deficient hydroxyapatite nanoparticles: structural and morphological evolution
Date
2014
Authors
Varadarajan, N.
Balu, R.
Sampath Kumar, T.
Rana, D.
Ramalingam, M.
Ramalingam, M.
Ramalingam, M.
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Journal article
Citation
Journal of biomaterials and tissue engineering, 2014; 4(4):295-299
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Varadarajan Namitha, Balu Rajkamal, Rana Deepti, Ramalingam Murugan, Kumar T. S. Sampath
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Abstract
Calcium deficient hydroxyapatite (CDHA) nanoparticles with a Ca/P ratio of 1.6 were synthesized by accelerated sonochemical process. The synthesis was carried out using calcium nitrate and diammonium hydrogen phosphate in an ultrasonic bath operated at a fixed frequency of 135 kHz and 250 Watts power. The effect of ultrasonic radiation as a function of time over the formation and structure of nanoparticles were investigated using X-ray diffraction, spectroscopy and microscopy methods. The synthesized nanocrystals showed X-ray powder diffraction pattern corresponding to that of hydroxyapatite stoichiometry with CDHA characteristics. HPO2– 4 Fourier transform infrared vibration band observed at 875 cm–1. Transmission electron microscopic analysis confirmed the nanocrystalline nature and growth of acicular, rod and needle-like CDHA nanocrystals morphology with increasing irradiation time.
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© AMERICAN SCIENTIFIC PUBLISHERS