Journal
CHEMISTRY OF MATERIALS
Volume 22, Issue 8, Pages 2662-2667Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm100228d
Keywords
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Funding
- Iketani Science and Technology Foundation
- Ministry of Environment of Japan
- Japan Science and Technology Agency (JST)
- NIMS Center for Nanotechnology Network
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In situ detection of volatile organic compounds (VOCs) in the atmosphere has become particularly important because of their detrimental effects on human health and the environment To develop high-performance gas sensors capable of detecting VOCs in ppb concentrations, we prepared SnO2 nanocrystals by a liquid-phase synthesis method. Nearly monodispersed SnO2 nanocrystals (ca. 3.5 nm) were prepared by heating tin(IV) acetylacetonate in dibenzyl ether in the presence of oleic acid and oleylamine at 280 degrees C The prepared nanocrystals exhibited high thermal stability against crystal growth, even at 600 degrees C, allowing for the fabrication of nanoparticulate gas-sensing films. The sensor device using the nanocrystals calcined at 600 degrees C exhibited significantly high sensor responses to VOCs such as ethanol, formaldehyde, and toluene at low ppm concentrations.
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