中文摘要：

采用NH4F-乙二醇-H2O溶液体系的电化学阳极氧化法,在金属钛基板上形成厚度为0.9-36μm的TiO2纳米管阵列。研究了阳极氧化电压、氧化时间及电解液的组成对TiO2纳米管阵列结构的影响。结果表明,当醇水体积比为39∶1时,60V电压下氧化2h,TiO2纳米管顶部的氧化层在缺陷处发生二次击穿溶解,产生自组装的孔核,场助溶解驱动力使纳米管顶部在孔核处沿管轴向垂直劈裂,形成直径20nm、长度可达几微米的TiO2纳米线。

英文摘要：

Anodization of titanium in a fluorinated glycol and H2O electrolyte was investigated.The prepared anodic film had nanotube-array architecture with 0.9-36 μm tube length.We discuss in details the influence of anodic voltage,anodic time and electrolyte composition on the structure of titania nanotubes.The result showed that TiO2 nanowires with a diameter of 20nm and a length up to several micron only can be synthesized in NH4F/glycol solution with a small amount of water（glycol∶H2O=39∶1）,60V anodic voltage and 2h anodic time.The nanowires originated from the vertical splitting of anodically grown nanotubes.