Investigation on biophysical properties of Hydroxyapatite/Graphene oxide (HAp/GO) based binary nanocomposite for biomedical applications

M. Ramadas, G. Bharath, N. Ponpandian, A. M. Ballamurugan

    Research output: Contribution to journalArticlepeer-review

    68 Scopus citations

    Abstract

    A simple hydrothermal procedure was implemented to prepare hydroxyapatite (HAp) nanorods grown on graphene oxides (GO) sheet. The crystalline structure, chemical composition and morphology of the as-prepared nanocomposites were characterized by using X-ray diffraction, Raman spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Nanorods like HAp nanostructure with the diameter and length in the range of ∼32 and 60–85 nm were uniformly grown on GO sheets. A possible formation mechanism of HAp nanorods grown on GO is proposed. Further, the bio-physical properties of HAp/GO nanocomposites were studied by using Bovine Serum Albumin (BSA) as a model protein. The particle surface effects on the BSA structure, the HAp/GO -protein composites were studied by circular dichroism (CD) between 200 and 260 nm. Result conforms, the primary structure of the 10 μM BSA exhibits a characteristic alpha-helix spectrum between wavelength 200–240, after 12 h incubation of the BSA with HAp/GO, no significant change in the alpha helix pattern of the BSA. Moreover, human skin cancer cells (A431) was used to determine the cytotoxicity of HAp/GO nanocomposites at various concentrations of 50–500 μg/mL for 24 h and the cytotoxicity was observed using MTT assays. The as-prepared HAp/GO nanocomposites showed no cytotoxicity effects on A431 cancer cell lines. Significance of this study shows that the as-prepared HAp/GO nanocomposites provide excellent biocompatibility which was used orthopedic, drug delivery and dentistry applications.

    Original languageBritish English
    Pages (from-to)179-184
    Number of pages6
    JournalMaterials Chemistry and Physics
    Volume199
    DOIs
    StatePublished - 15 Sep 2017

    Keywords

    • Binary composite
    • Biocompatibility
    • Drug delivery
    • Graphene
    • Hydroxyapatite
    • Protein binding

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