Electrospun ZnO Nanowires as Gas Sensors for Ethanol Detection
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
Nanoscale Research Letters 2009, 4:513-517 doi:10.1007/s11671-009-9271-4Published: 4 March 2009
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%.