Structure and humidity sensing properties of SnO2 zigzag belts

✍ Scribed by Lijun Li; Ke Yu; Jin Wu; Yang Wang; Ziqiang Zhu

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 324 KB
• Volume: 45
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200900718

✦ Synopsis

A novel method was developed for synthesizing ultralong SnO 2 zigzag belts with the assistance of CuO powder. The crystalline structure and morphology of SnO 2 zigzag belts were characterized using x-ray diffraction, scanning electron microscopy and transmission electron microscopy. The growth mechanism of the ultralong SnO 2 zigzag belts and the catalytic behavior of the copper were discussed. The humidity sensor based on as-synthesized product shows high sensitivity and fast response time due to unique structure of the SnO 2 zigzag belts with large surface-to-volume ratio. It can be found that the resistance of the SnO 2 materials decreases obviously with increasing relative humidity (RH) at room temperature (26 °C). The results demonstrate that these SnO 2 nanostructures are potential to be used as effective and high performance humidity sensors.