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中文摘要：
通过控制双氧水/浓硫酸混合氧化液的反应配比和反应温度,在医用纯钛表面得到具有不同纳米形貌的二氧化钛凝胶层。利用场发射扫描电镜（FE-SEM）、原子力显微镜（AFM）、X射线光电子能谱（XPS）和接触角测定仪对化学氧化处理后的钛表面特性进行了表征,并推导了不同纳米形貌凝胶层的构建机理。结果表明,双氧水/浓硫酸溶液处理是一个热力学控制的化学溶解与氧化的过程,随着浓硫酸含量的增加,溶液中C（H＋）增大,凝胶层内TiO2的溶解速度大于溶液沉积出二氧化钛的速度,导致凝胶孔的深度增加最终形成三维网络结构;模拟体液中的矿化实验表明,化学氧化处理钛表面有利于钙磷盐的沉积。
英文摘要：
Different nanotextured titanium surfaces were created by controlling the exposure time and temperature of titanium in a mixture of H2O2 and H2SO4.The field emission scanning electron microscopy（FE-SEM）,atomic force microscope（AFM） and contact angle measurement were used to study the characteristics and mechanism of the construction of nanotextured titanium surfaces.Bioactivity was investigated by immersing the samples in a simulated body fluid（SBF） for 7 d.Results show that the difference of the nanotopographies is attributed to the increase of the concentration of H＋,which speeds up the dissolution of porous titania gel and a bone-like apatite could be formed on the surface created by chemical oxidation.The method in this paper can be developed to be an intelligent nanotechnology for nano-functionalization of titanium.
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