Silver-ceria stabilized zirconia composite coatings on titanium for potential implant applications

摘要

Surface tailoring of titanium (Ti) implant is an effective way to prevent the initial bacterial adhesion and to improve the biocompatibility of the implants. In view of that, single layered silver (Ag)-ceria stabilized zirconia (CeSZ) nanocomposite coatings were developed on titanium substrates by co-evaporation method using electron beam physical vapor deposition (EBPVD) technique. The concentration of silver was varied from 0, 5 and 10 weight percentage and their microstructure, morphology, bacterial adhesion and corrosion properties were analyzed. Silver-ceria stabilized zirconia nanocomposite coatings have shown superior corrosion resistance than uncoated Ti substrate. Antibacterial efficiency of the coated and uncoated Ti substrates were evaluated using E. coli bacterial strain. Cytotoxic behavior of silver doped and undoped CeSZ coating was carried out in 3T3 mouse fibroblast cells. Electrochemical impedance spectroscopy (EIS) analysis indicated that higher corrosion resistance was observed in 5 wt% Ag added CeSZ nanocomposite coating system than other coated and uncoated substrates.