J X Wang et al 2009 Nanotechnology 20 465501 doi:10.1088/0957-4484/20/46/465501
N–P transition sensing behaviors of ZnO nanotubes exposed to NO2 gas
J X Wang1,2,3, X W Sun1, Y Yang1 and C M L Wu2
Show affiliationsHydrothermally synthesized ZnO nanotube arrays were used to fabricate the gas sensor for detection of the toxic gas NO2. The ZnO nanotube gas sensor exhibited sensitive response to NO2 down to 500 ppb at low temperature 30 °C. Abnormal temperature-dependent and concentration-dependent N–P transition behaviors were observed. The excellent sensing ability of the sensor and their anomalous conductivity behaviors may be attributed to the unique surface conductivity related to the hollow nanostructure feature. These sensing behaviors may help to comprehensively understand the sensing mechanism of 1D ZnO nanostructures and improve the selectivity of the ZnO gas sensor.
- PACS
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82.80.-d Chemical analysis and related physical methods of analysis
- Subjects
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Surfaces, interfaces and thin films
- Dates
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Issue 46 (18 November 2009)
Received 7 July 2009, in final form 15 September 2009
Published 21 October 2009
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N–P transition sensing behaviors of ZnO nanotubes exposed to NO2 gas
J X Wang et al 2009 Nanotechnology 20 465501
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Intracellular uptake, trafficking and subcellular distribution of folate conjugated single walled carbon nanotubes within living cells
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Self-assembled growth of catalyst-free GaN wires by metal–organic vapour phase epitaxy
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