A facile method for the synthesis of tapered ZnO:Cu nanorod arrays and its secondary growth

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• 作者：Jun Huang^a ; Liang Hu^a ; Honghai Zhang^a ; Jie Zhang^a ; Xiaopeng Yang^a ; Dehui Li^b ; Liping Zhu^a ; ^{zlp1@zju.edu.cn} ; Zhizhen Ye^a
• 关键词：A1. Cu doping ; A1. Diffusion ; A1. Tapered nanorod arrays ; A3. Secondary growth ; B2. ZnO
• 刊名：Journal of Crystal Growth
• 出版年：2012
• 期刊代码：49_00220248
• 类别：ch
• 出版时间：15 July, 2012
• 卷：351
• 期：1
• 页码：93-100
• 文件大小：1528 K

摘要

A facile thermal diffusion method has been employed to synthesize tapered ZnO:Cu nanorod arrays. The plain hexagonal ZnO nanorods gradually turned into round cylinder and then tapered nanorods during thermal treatment. The shape evolution was explained by the terrace-ledge-kink model. Moreover, a small amount of copper has been incorporated into the nanorods during high temperature thermal treatment. Both X-ray photoelectron spectrum and photoluminescence results indicated that a number of oxygen vacancies exist in copper diffused samples. In addition, a catalyst free secondary growth was achieved on the tapered ZnO:Cu nanorod arrays. High resolution transmission electron microscope result showed that the tapered nanorods after secondary growth remained as a single crystal and the thinner section was epitaxially grown on the tip.