期刊
MATERIALS RESEARCH INNOVATIONS
卷 13, 期 3, 页码 185-188出版社
MANEY PUBLISHING
DOI: 10.1179/143307509X437572
关键词
E-nose; Alcohol; Nanostructure; Gas sensor; Au-doped zinc oxide
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 degrees 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.
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