Super-long aligned TiO2/carbon nanotube arrays |
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Authors: | Zhao Yang Hu Yue Li Yan Zhang Han Zhang Shaowen Qu Liangti Shi Gaoquan Dai Liming |
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Affiliation: | Key Laboratory of Cluster Science, Ministry of Education, Department of Chemistry, Beijing Institute of Technology, Beijing 100081, People's Republic of China. |
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Abstract: | 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. |
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