Atmospheric plasma spray coating of antibacterial nano silver-hydroxyapatite on titanium surface for biomedical applications
Uğursoy Olgun, Hülya Çetin, Ayşegül Hoş, Mustafa Gülfen, Fatih Üstel
Abstract
In this paper, the nanosilver particles were deposited onto the hydroxyapatite (HAP) microparticles and the obtained nanoAg-HAP particles were coated onto the Ti metal surface using the atmospheric plasma spray method. Then, the obtained nanoAg-HAP coating on Ti substrate was annealed at 700°C. The antibacterial activities of the nanoAg-HAP coatings on Ti were also tested against the microorganisms. The prepared nanoAg-HAP particles were examined using the optic microscopy, FE-SEM, HR-TEM, XRD and the UV-vis. absorption spectroscopy methods. The nanoAg particles exhibited crystalline spherical morphologies with the particle sizes below 30 nm. In the FE-SEM-EDS measurements, well distribution of nanoAg particles on the HAP microparticles were observed with Ag concentrations of 0.153% and 0.313%. The HR-TEM measurements showed that the nanoAg particles have hexagonal close packing (hcp) crystal structure with the d-spacing values of 0.23 nm (111), 0.21 nm (002) and 0.14 nm (022). After 700°C heat treatment, the prepared nanoAg-HAP coating on Ti metal showed 100% antibacterial activity against E. coli and S. epidermidis bacteria. As a result, the obtained nanoAg-HAP coated Ti metal can be utilized effectively as a self-disinfecting biomedical implant material in the orthopedic bone repairing of the body parts.