Author : S.K Biswal,U.K Parida and B.K Bindhani

 
Growth of hydroxyapatite (HA) on Tamarind Seed Polysacharide (TSP)–chitosan composite capped gold nanoparticles is presented for the first time by employing wet precipitation methods and we obtained good yields of HA. Fourier transform infrared spectroscopy (FTIR) spectrum has shown the characteristic bands of phosphate groups in the HA. Scanning electron microscopy (SEM) pictures have shown spherical nanoparticles with the size in the range of 50– 150 nm, whereas ≥2–50 nm sized particles were visualized in high resolution transmission electron microscopy (HR-TEM). X-ray diffraction (XRD) spectrum has shown Bragg reflections which are comparable with the HA. Energy dispersive X-ray (EDX) studies have confirmed calcium/phosphate stoichiometric ratio of HA. The thermogravimetric analysis (TGA) has shown about 74% of inorganic crystals in the nanocomposite formed. These results have revealed that TSP–chitosan capped gold nanoparticles, acted as a matrix for the growth of HA.

Keywords: TSP –chitosan composite, Wet precipitation, Hydroxyapatite , Gold nanoparticles , Nanocomposite materials

Article published in International Journal of Current  Engineering  and Technology, Vol.3,No.3(Aug- 2013)