One-step fabrication of cytocompatible micro/nano-textured surface with TiO₂ mesoporous arrays on titanium by high current anodization

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• 作者：Xiaobo Huang ; ^{huangxiaobo@tyut.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yinping Liu ; Hanwu Yu ; Xiaoning Yang ; Yueyue Wang ; Ruiqiang Hang ; ^{hangruiqiang@tyut.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Bin Tang
• 关键词：Anodization ; Titanium ; Micro/nano-texture ; Biomaterials
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：1 May 2016
• 年：2016
• 卷：199
• 期：Complete
• 页码：116-125
• 全文大小：6638 K

文摘

High current anodization (HCA) is a novel strategy to fabricate micro/nano-textured surface with TiO₂ mesoporous arrays (MNT-TMAs) on biomedical titanium (Ti) and its alloys. However, our previous study shows that the structure prepared in AgNO₃ electrolyte has severe cytotoxicity because of the incorporation of Ag into the surface. The present work tries to prepare MNT-TMAs on Ti surfaces in Cu(NO₃)₂ electrolyte to eliminate the side effect of Ag. Our results show that the unique structure can be generated in a wide range of Cu(NO₃)₂ concentrations (1.0 to 12.0 g/l). The increase of Cu(NO₃)₂ concentration has little influence on its micromorphology but decreases the diameter of mesopores. Good interfacial strength is observed. The resultant surface possesses good cytocompatibility because of the absence of toxic Cu in the coatings. Addition of Na₃PO₄ into the electrolyte has little influence on its microstructure, but can further improve the cytocompatibility due to the incorporation of P into the surface. Good cytocompatibility and interfacial strength render the technique promising in surface modification of implant materials.