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Synthesis and properties of multipod-shaped ZnO nanorods for gas-sensor applications

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Abstract

We reported the synthesis and optical properties of ZnO nanorods with multipod shapes, and their applications as gas sensors. The multipod-shaped ZnO (M-ZnO ) nanorods, having tens of needle-like nanorods united at a common junction, exhibited different structural and optical characters from those of the tetrapod-shaped ZnO (T-ZnO) nanorods. Employing the M-ZnO and the T-ZnO nanorods, respectively, gas sensors were prepared and tested for the detection of ethanol in air. It was found that the M-ZnO devices had an improved sensing performance in comparison with that of the T-ZnO sensors, of which a possible sensing mechanism related to a surface reaction process was discussed.

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Authors and Affiliations

  1. Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100080, China

    T. Gao & T.H. Wang

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  1. T. Gao
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  2. T.H. Wang
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Correspondence to T. Gao.

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PACS

81.07.Bc; 78.55.Et; 07.07.Df

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Gao, T., Wang, T. Synthesis and properties of multipod-shaped ZnO nanorods for gas-sensor applications. Appl. Phys. A 80, 1451–1454 (2005). https://doi.org/10.1007/s00339-004-3075-2

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