Enhanced ethanol sensing properties of TiO₂ nanotube sensors

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• 作者：Youngjae Kwon ; Hyunsu Kim ; Sangmin Lee ; In-Joo Chin ; Tae-Yeon Seong ; Wan In Lee ; Chongmu Lee
• 关键词：TiO2 nanotubes ; Gas sensors ; Response ; Ethanol
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：173
• 期：Complete
• 页码：441-446
• 全文大小：994 K

文摘

TiO₂ nanotube arrays were prepared for use as gas sensors by anodizing Ti thin foils. Transmission electron microscopy revealed a tube diameter and length ranging from 70 to 120 nm and 300 to 400 nm, respectively. The TiO₂ nanotube array sensors showed responses of 68,000 and 1,380,000 % to 300 and 1000 ppm C₂H₅OH at 250 ¡ãC, respectively. These values are far superior to the responses obtained by most oxide one-dimensional nanostructures reported in the literature. In addition, the ethanol sensing mechanism of the TiO₂ nanotube array sensors is discussed.