Tong Yanhong, Liu Yichun, Shao Changlu, Liu Yuxue, Xu Changshan, Zhang Jiying, Lu Youming, Shen Dezhen, Fan Xiwu
Center for Advanced Opto-Electronic Functional Material Research, Northeast Normal University, Changchun 130024, People's Republic of China.
J Phys Chem B. 2006 Aug 3;110(30):14714-8. doi: 10.1021/jp056654h.
Well-faceted hexagonal ZnO nanotubes were synthesized by a simple hydrothermal method and the subsequent aging process without any catalysts or templates. The formation of the tubular structure is closely linked to the polarity of ZnO and the selective adsorption behavior of Zn2+ amino complexes. The surface-related optical properties were studied with use of Raman and photoluminescence spectra. It was found that the oxygen vacancy-related visible emission intensity decreased while surface defect-related visible emission intensity increased when the nanotubes were annealed in oxygen ambient. The anomalous enhancement of PL integrated intensity with the temperature shows fairly high surface state density existing in ZnO nanotubes.
通过简单的水热法及后续老化过程，在无任何催化剂或模板的情况下合成了晶面良好的六方ZnO纳米管。管状结构的形成与ZnO的极性及Zn2+氨基配合物的选择性吸附行为密切相关。利用拉曼光谱和光致发光光谱研究了与表面相关的光学性质。结果发现，当纳米管在氧气环境中退火时，与氧空位相关的可见发射强度降低，而与表面缺陷相关的可见发射强度增加。PL积分强度随温度的异常增强表明ZnO纳米管中存在相当高的表面态密度。
