Au-doped zinc oxide nanostructure sensors for detection and discrimination of volatile organic compounds

作者：Wongchoosuk C; Choopun S; Tuantranont A; Kerdcharoen T^*

来源：Materials Research Innovations, 2009, 13(3): 185-188.

DOI：10.1179/143307509X437572

• 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.

• 出版日期2009-9