Preparation and ultrasound-assisted antibacterial properties of barium titanate nanorod arrays on titanium
Postoperative bacterial infection of titanium implants is a common clinical complication.In this paper,arrays of oxygen-deficient barium titanate nanorods(BaTiO3-x)were constructed on the Ti surface by hydro-thermal and annealing treatments.The synthesis of BaTiO3 nanorods was confirmed using scanning electron mi-croscopy,transmission electron microscopy,and X-ray diffractometry,and the presence of oxygen vacancies was confirmed using X-ray photoelectron spectroscopy.The reactive oxygen species(ROS)generation ability of BaTiO3-x nanorod arrays under ultrasound was verified using methyl violet(MV)as a trapping agent.The re-sults show that BaTiO3-x nanorod arrays can effectively generate hydroxyl radicals(·OH)under ultrasonic(US)irradiation.Antibacterial experiments were conducted with Staphylococcus aureus(S.aureus),and the antibacterial capacity of BaTiO3-x nanorod arrays under US was investigated by the plate spread method.The results showed that the antibacterial rate of BaTiO3-x against S.aureus reached 90.92％after 15 min of US ir-radiation.This study provides ideas for the preparation of antimicrobial coatings on titanium implant surfaces and lays the foundation for expanding US-responsive antimicrobial coatings.
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维普
