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A two-step hydrothermally grown ZnO microtube array for CO gas sensing

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Abstract

Tubular ZnO microstructure arrays were fabricated on a large scale by a two-step hydrothermal method. The porous ZnO tubular structures were then used to construct a gas sensor for CO detection. The microtube array gas sensor showed sensitive response to different concentration of CO with an optimum temperature of 250 °C. Because of the large surface to volume ratio, the sensitivity of the microtube arrays was about twice of that of the ZnO rods. Our results indicate that this simple two-step method for fabrication of large-scale tubular microstructure arrays can be potentially used in gas sensor applications with improved performance.

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Authors and Affiliations

  1. School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore, Singapore

    J.X. Wang, X.W. Sun, H. Huang, Y.C. Lee & O.K. Tan

  2. Institute of Microelectronics, 11 Science Park Road, Science Park II, 117685, Singapore, Singapore

    X.W. Sun, M.B. Yu, G.Q. Lo & D.L. Kwong

Authors
  1. J.X. Wang
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  2. X.W. Sun
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  3. H. Huang
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  4. Y.C. Lee
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  5. O.K. Tan
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  6. M.B. Yu
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  7. G.Q. Lo
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  8. D.L. Kwong
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Corresponding author

Correspondence to X.W. Sun.

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PACS

81.07.Bc; 78.55.Et; 07.07.Df

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Wang, J., Sun, X., Huang, H. et al. A two-step hydrothermally grown ZnO microtube array for CO gas sensing. Appl. Phys. A 88, 611–615 (2007). https://doi.org/10.1007/s00339-007-4076-8

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  • DOI: https://doi.org/10.1007/s00339-007-4076-8

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