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Journal of Nanomaterials
Volume 2013, Article ID 542878, 8 pages
Research Article

Antibacterial Coating Incorporating Silver Nanoparticles by Microarc Oxidation and Ion Implantation

1School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
2Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China

Received 6 November 2012; Accepted 6 December 2012

Academic Editor: Jianxin Zou

Copyright © 2013 Peng Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Infection associated with titanium implants remains the most common serious complication in hard tissue replacement surgery. Since such postoperative infections are usually difficult to cure, it is critical to find optimal strategies for preventing infections. In this study, TiO2 coating incorporating silver (Ag) nanoparticles were fabricated on pure titanium by microarc oxidation and ion implantation. The antibacterial activity was evaluated by exposing the specimens to Staphylococcus aureus and comparing the reaction of the pathogens to Ti-MAO-Ag with Ti-MAO controls. Ti-MAO-Ag clearly inhibited bacterial colonization more than the control specimen. The coating’s antibacterial ability was enhanced by increasing the dose of silver ion implantation, and Ti-MAO-Ag20.0 had the best antibacterial ability. In addition, cytocompatibility was assessed by culturing cell colonies on the specimens. The cells grew well on both specimens. These findings indicate that surface modification by means of this process combining MAO and silver ion implantation is useful in providing antibacterial activity and exhibits cytocompatibility with titanium implants.