Au-doped zinc oxide nanostructure sensors for detection and discrimination of volatile organic compounds
Authors: Wongchoosuk, C.1; Choopun, S.2; Tuantranont, A.3; Kerdcharoen, T.4
Source: Materials Research Innovations, Volume 13, Number 3, September 2009 , pp. 185-188(4)
Publisher: Maney Publishing
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Abstract:
Pure and 10% w/w Au-doped zinc oxide (ZnO) nanostructure sensors were produced and used as sensing devices in a portable electronic nose (E-nose). The nanosensors were prepared using thermal oxidation technique with sintering temperature at 700°C under oxygen atmosphere at a flow rate of 500 mL min-1. The sensors were demonstrated to be sensitive to various volatile organic compounds (VOCs), especially ethanol vapour. The E-nose even with only two sensors was efficient to discriminate a number of selected VOCs. The Au-doped sensor shows a significant improvement of sensitivity. The portable E-nose can detect the difference between alcohol beverages and alcohol solutions and can distinguish the difference of white and red wines having the same percentage of alcohol.Keywords: E-NOSE; ALCOHOL; NANOSTRUCTURE; GAS SENSOR; AU-DOPED ZINC OXIDE
Document Type: Research article
DOI: 10.1179/143307509X437572
Affiliations: 1: Department of Physics and Center of Nanoscience and Nanotechnology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand 2: Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand 3: Nanoelectronic and MEMS Lab, National Electronic and Computer Technology Center, Pathumthani, Bangkok 12120, Thailand 4: Department of Physics and Center of Nanoscience and Nanotechnology, Faculty of Science, Mahidol University, Bangkok 10400, NANOTEC Center of Excellence at Mahidol University, National Nanotechnology Center, Thailand;, Email: sctkc@mahidol.ac.th
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