Decisive role of Au layer on the oriented growth of ZnO nanorod arrays via a simple aqueous solution method |
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Authors: | Guan-nan He Bo Huang Hui Shen |
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Institution: | 1. School of Physics and Engineering, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China;2. Department of Electronic Engineering, Jinan University, Guangzhou, Guangdong 510632, China |
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Abstract: | Vertically aligned arrays of ZnO nanorod were synthesized on the Au/SiO2/Si(1 0 0) substrate by a simple aqueous solution growth process, without pre-prepared ZnO seed layer. For comparison, glass and SiO2/Si were also used as substrates, and the results show that the Au layer plays a decisive role in orienting the growth of the ZnO nanorod. The effects of other growth parameters, including Zn2+ concentration and growth time, on morphology, density, and orientation of the ZnO nanostructure were also studied and with longer reaction time, a new structure namely ZnO nanotip was obtained. Moreover, the growth mechanism of ZnO nanorod arrays grown on the Au/SiO2/Si substrate was proposed. |
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Keywords: | A1 Growth models A1 Nanostructures A2 Growth from solutions B2 Semiconducting II&ndash VI materials |
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