Microstructure and antibacterial properties of Cu-doped TiO₂ coating on titanium by micro-arc oxidation

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• 作者：Xiaohong Yao ; Xiangyu Zhang ; Haibo Wu ; Linhai Tian ; Yong Ma ; Bin Tang
• 关键词：Micro-arc oxidation ; Titanium ; Cu nanoparticles ; Antibacterial activities
• 刊名：Applied Surface Science
• 出版年：15 February, 2014
• 年：2014
• 卷：292
• 期：Complete
• 页码：944-947
• 全文大小：1503 K

文摘

Infection associated with titanium implants remains the most common serious complication after surgery. In this work, Cu-doped antibacterial TiO₂ coating was synthesized by micro-arc oxidation of titanium in an electrolyte bearing Cu nanoparticles. Surface morphology and structure of the coating were characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicated that Cu nanoparticles were not only distributed on the surface and inside the pores but also embedded in the coating. Cu mainly exists in the Cu²⁺ state in the TiO₂ coating. The Cu-doped coating exhibited excellent antibacterial activities against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus).