CAJ | 학술논문

采用NH4F-乙二醇-H_2O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TiO_2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TiO_2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,TiO_2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TiO_2纳米线.
채용NH4F-을이순-H_2O용액체계적전화학양겁양화법,재금속태기판상형성후도위0.9～36μm적TiO_2납미관진렬.연구료양겁양화전압、양화시간급전해액적조성대TiO_2납미관진렬결구적영향.결과표명,당순수체적비위39:1시,60V전압하양화2h,TiO_2납미관정부적양화층재결함처발생이차격천용해,산생자조장적공핵,장조용해구동력사납미관정부재공핵처연관축향수직벽렬,형성직경20nm、장도가체궤미미적TiO_2납미선.
Anodization of titanium in a fluorinated glycol and H_2O 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 TiO_2 nanowires with a diameter of 20nm and a length up to several micron only can be synthesized in NH_4F/glycol solution with a small amount of water (glycol:H_2O=39:1), 60V anodic voltage and 2h anodic time. The nanowires originated from the vertical splitting of anodically grown nanotubes.