Key Laboratory of Cluster Science, Ministry of Education, Department of Chemistry, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
Nanotechnology. 2010 Dec 17;21(50):505702. doi: 10.1088/0957-4484/21/50/505702. Epub 2010 Nov 22.
5 mm long aligned titanium oxide/carbon nanotube (TiO(2)/CNT) coaxial nanowire arrays have been prepared by electrochemically coating the constituent CNTs with a uniform layer of highly crystalline anatase TiO(2) nanoparticles. While the presence of the TiO(2) coating was confirmed by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and x-ray diffraction, the resultant TiO(2)/CNT coaxial arrays were demonstrated to exhibit minimized recombination of photoinduced electron-hole pairs and fast electron transfer from the long TiO(2)/CNT arrays to external circuits. This, in conjunction with the aligned macrostructure, facilitates the fabrication of TiO(2)/CNT arrays for various device applications, ranging from photodetectors to photocatalytic systems. Thus, the millimeter long TiO(2)/CNT arrays represent a significant advance in the development of new macroscopic photoelectronic nanomaterials attractive for a variety of device applications beyond those demonstrated in this study.
5 毫米长的定向钛氧化物/碳纳米管（TiO(2)/CNT）同轴纳米线阵列已通过电化学方法在组成 CNT 上涂覆一层均匀的高结晶锐钛矿 TiO(2)纳米粒子制备而成。扫描电子显微镜、透射电子显微镜、拉曼光谱和 X 射线衍射证实了 TiO(2)涂层的存在，而所得的 TiO(2)/CNT 同轴阵列则表现出最小化光生电子-空穴对的复合和从长 TiO(2)/CNT 阵列到外部电路的快速电子转移。这一点，再加上定向的宏观结构，有利于制造各种器件应用的 TiO(2)/CNT 阵列，从光探测器到光催化系统。因此，毫米长的 TiO(2)/CNT 阵列代表了在开发新型宏观光电纳米材料方面的重大进展，这些材料对于除本研究中所示之外的各种器件应用具有吸引力。
