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Ag-doped ZnO nanorods synthesized by two-step method |
Chen Xian-Mei (陈先梅), Ji Yong (冀勇), Gao Xiao-Yong (郜小勇), Zhao Xian-Wei (赵显伟 ) |
Key Laboratory of Material Physics of Ministry of Education, School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, China |
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Abstract Two-step method is adopted to synthesize Ag-doped ZnO nanorods. A ZnO seed layer is first prepared on a glass substrate by thermal decomposition of zinc acetate. Ag-doped ZnO nanorods are then assembled on the ZnO seed layer using the hydrothermal method. The influences of the molar percentage of Ag ions to Zn ions (RAg/Zn) on the structural and optical properties of the ZnO nanorods obtained are carefully studied using X-ray diffractometry, scanning electron microscopy and spectrophotometry. Results indicate that Ag ions enter into the crystal lattice through the substitution of Zn ions. The <002> c-axis-preferred orientation of the ZnO nanorods decreases as RAg/Zn increases. At RAg/Zn > 1.0%, ZnO nanorods lose their c-axis-preferred orientation and generate Ag precipitates from the ZnO crystal lattice. The average transmissivity in the visible region first increases and then decreases as RAg/Zn increases. The absorption edge is first blue shifted and then red shifted. The influence of Ag doping on the average head face, and axial dimensions of the ZnO nanorods may be optimized to improve the average transmissivity at RAg/Zn < 1.0%.
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Received: 22 March 2012
Revised: 26 April 2012
Accepted manuscript online:
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PACS:
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68.35.bj
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(Amorphous semiconductors, glasses)
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81.10.-h
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(Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
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91.60.Ed
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(Crystal structure and defects, microstructure)
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91.60.Mk
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(Optical properties)
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Fund: Projected supported by the National Natural Science Foundation of China (Grant No. 60807001), the Foundation of Henan Educational Committee, China (Grant No. 2010A140017), the Henan Provincial College Young Teachers Program, China, and the Graduate Innovation of Zhengzhou University, China (Grant No. 11L10102). |
Corresponding Authors:
Gao Xiao-Yong
E-mail: xygao@zzu.edu.cn
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Cite this article:
Chen Xian-Mei (陈先梅), Ji Yong (冀勇), Gao Xiao-Yong (郜小勇), Zhao Xian-Wei (赵显伟 ) Ag-doped ZnO nanorods synthesized by two-step method 2012 Chin. Phys. B 21 116801
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