Hydrothermal growth of symmetrical ZnO nanorod arrays on nanosheets for gas sensing applications |
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| Authors: | Wenyan Zhao Chuanjin Tian Zhipeng Xie Changan Wang Wuyou Fu Haibin Yang |
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| Affiliation: | 1.School of Materials Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,China;2.State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering,Tsinghua University,Beijing,China;3.State Key Laboratory of Superhard Materials,Jilin University,Changchun,China |
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| Abstract: | ![]()
The hierarchical ZnO nanostructures with 2-fold symmetrical nanorod arrays on zinc aluminum carbonate (ZnAl-CO3) nanosheets have been successfully synthesized through a two-step hydrothermal process. The primary nanosheets, which serve as the lattice-matched substrate for the self-assembly nanorod arrays at the second-step of the hydrothermal route, have been synthesized by using a template of anodic aluminum oxide (AAO). The as-prepared samples were characterized by XRD, FESEM, TEM and SAED. The nanorods have a diameter of about 100 nm and a length of about 2 μm. A growth mechanism was proposed according to the experimental results. The gas sensor fabricated from ZnO nanorod arrays showed a high sensitivity to ethanol at 230°C. In addition, the response mechanism of the sensors has also been discussed according to the transient response of the gas sensors. |
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