• A KANDASWAMY

      Articles written in Bulletin of Materials Science

    • Synthesis and characterization of magnetite/hydroxyapatite tubes using natural template for biomedical applications

      M SNEHA N MEENAKSHI SUNDARAM A KANDASWAMY

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      Inorganic nanotubes have attracted much attention during the last few decades for its potential applications in the field of regenerative medicine and controlled drug delivery. In the present work, we have designed andsynthesized magnetite hydroxyapatite micro and nanotubes. The first step is the formation of magnetite (Fe$_3$O$_4$) tubes on natural template followed by hydroxyapatite (HAp) bioceramic coated on the Fe$_3$O$_4$ tubes. HAp improves the biocompatibility and stability of the prepared tubes. Sintering at 900$^{\circ}$C improves the crystalline stability of nanotubes and removes the natural template. X-ray diffraction, N$_2$ adsorption–desorption studies (BET), thermogravimetric analysis, differential scanning calorimetry, optical micrographs, field emission scanning electron microscope and transmission electron microscope studies were carried out to confirm the structural and morphological analysis of prepared magnetic tubular structure.

    • Synthesis and characterization of hydroxyapatite/alumina ceramic nanocomposites for biomedical applications

      S VIGNESH RAJ M RAJKUMAR N MEENAKSHI SUNDARAM A KANDASWAMY

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      In the present work, nanocrystalline hydroxyapatite/alumina (HAp−Al$_2$O$_3$) composite was prepared under specially designed stir-type hydrothermal reactor. The composite was prepared at two different temperatures under autogenous pressure and analysed for crystallinity, size, shape, composition and thermomechanical stability. The electron microscopy study shows the formation of HAp−Al$_2$O$_3$ composite nanorods with uniform distribution. The thermogravimetry analysis reveals better thermomechanical property with minimal weight loss at increased temperature. The effect ofdifferent concentrations of HAp−Al$_2$O$_3$ composite powders against MG63 human osteosarcoma cell lines shows excellent compatibility (80%) at high concentration of 200 $\mu$g ml$^{−1}$. These studies facilitate the formation of biocompatible HAp−Al$_2$O$_3$ composite nanorods for biomedical applications.

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