• Surface modification of TiO2 coatings by Zn ion implantation for improving antibacterial activities

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    • Keywords


      TiO$_2$; zinc; plasma spray; plasma immersion ion implantation; antibacterial.

    • Abstract


      TiO$_2$ coating has been widely applied in orthopaedic and dental implants owing to its excellent mechanical and biological properties. However, one of the biggest complications of TiO$_2$ coating is implant-associated infections. The aim of this work is to improve the antibacterial activity of plasma-sprayed TiO$_2$ coatings by plasma immersion ion implantation (PIII) using zinc (Zn) ions. Results indicate that the as-sprayed TiO$_2$ coating is mainly composed of rutile phase. Zn-PIII modification does not change the phase compositions and the surface morphologies of TiO$_2$ coatings, while change their hydrophilicity. Zn-implanted TiO$_2$ coatings can inhibit the growth of Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli), and the ability to inhibit S. aureus is greater than that to E. coli. Zn ion release and reactive oxygen species may be attributed to improving the antibacterial activity of TiO$_2$ coating. Therefore, Zn-PIII TiO$_2$ coatings on titanium suggest promising candidates for orthopaedic and dental implants.

    • Author Affiliations


      Xiaobing Zhao1 2 3 Jiashen Yang1 Jing You1

      1. School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
      2. Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences, Shanghai 200050, China
      3. Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China
    • Dates

  • Bulletin of Materials Science | News

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