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Open Access Nano Express

Electrospun ZnO Nanowires as Gas Sensors for Ethanol Detection

Wan-Yu Wu1, Jyh-Ming Ting12* and Po-Jung Huang2

Author Affiliations

1 Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan

2 Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University, Tainan, Taiwan

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Nanoscale Research Letters 2009, 4:513-517  doi:10.1007/s11671-009-9271-4

Published: 4 March 2009

Abstract

ZnO nanowires were produced using an electrospinning method and used in gas sensors for the detection of ethanol at 220 °C. This electrospinning technique allows the direct placement of ZnO nanowires during their synthesis to bridge the sensor electrodes. An excellent sensitivity of nearly 90% was obtained at a low ethanol concentration of 10 ppm, and the rest obtained at higher ethanol concentrations, up to 600 ppm, all equal to or greater than 90%.

Keywords:
Zinc oxide; Electrospinning; Ethanol sensor; Sensitivity