| ZnO纳米棒阵列在TiO2介孔薄膜上的生长及其表征 |
| Growth and Characterization of ZnO Nanorod Arrays on the Mesoporous TiO2 Films |
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| 摘要: 通过低温水热法成功地将ZnO纳米棒阵列定向生长在了介孔锐钛矿TiO2纳米晶薄膜上，并主要利用X射线衍射、场发射扫描电子显微镜和光致发光光谱等对其进行了表征。所制备的纳米棒具有六边形的端面，纳米棒的尺寸及端面边长分布范围窄，并且沿c轴方向(002)表现出了明显的择优化生长。此外，相比于玻璃基底或TiO2纳米颗粒薄膜，生长在介孔TiO2薄膜上的ZnO纳米棒阵列表现出了较好的取向生长，表明基底的表面结构和组成对ZnO纳米棒阵列的生长有显著的影响。根据基底有序的多孔结构，讨论了纳米棒阵列可能的生长机理。所得到的ZnO纳米棒阵列在室温下分别表现出了以370 nm为中心的强近紫外光和以530 nm为中心的弱绿光两条荧光谱带。 |
| 关键词: 纳米结构薄膜 氧化锌纳米棒阵列 晶体生长 光致发光 |
| 基金项目: |
| Abstract: Oriented ZnO nanorod arrays have been successfully grown on the mesoporous nanocrystalline anatase TiO2 films via low temperature hydrothermal processes, and characterized mainly by X-Ray Diffraction, Field Emission Scanning Electron Microscopy and Photoluminescence Spectroscopy. The as-prepared nanorods have narrow size distribution in the length and diameter with hexagonal end planes, and display markedly preferential growth along c-axis direction (002). Moreover, the ZnO nanorod arrays grown on the mesoporous nanocrystalline TiO2 films exhibit rather good orientation compared with those on the glasses or on the nanoparticle TiO2 films, demonstrating that the surface structure and the composition of the substrates have great effects on the formation and the orientation of ZnO nanorod arrays. A possible formation mechanism related to the ordered mesoporous structure of the oriented nanorod arrays is suggested. The typical ZnO nanorod array displays a strong near-ultraviolet photoluminescence band centering at about 370 nm and a weak green photoluminescence band centering at 530 nm at the room temperature. |
| Keywords: nanostructured film ZnO nanorod array crystal growth photoluminescence |
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| 田晓亮,孙婉婷,谢明政,井立强.ZnO纳米棒阵列在TiO2介孔薄膜上的生长及其表征[J].无机化学学报,2012,28(7):1441-1446. |
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