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

• Main Authors: Wongchoosuk C., Choopun S., Tuantranont A., Kerdcharoen T.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-70149097149&partnerID=40&md5=4bfb9b42a219dfde4c1876d3261de3a4; http://cmuir.cmu.ac.th/handle/6653943832/5810
• Institution: Chiang Mai University

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. © W. S. Maney & Son Ltd. 2009.