A two-step hydrothermally grown ZnO microtube array for CO gas sensing |
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| Authors: | JX Wang XW Sun H Huang YC Lee OK Tan MB Yu GQ Lo DL Kwong |
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| Institution: | (1) School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, 639798 Singapore, Singapore;(2) Institute of Microelectronics, 11 Science Park Road, Science Park II, 117685 Singapore, Singapore |
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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.
PACS 81.07.Bc; 78.55.Et; 07.07.Df |
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