Fast humidity sensors based on CeO2 nanowires

Fast humidity sensors are reported that are based on CeO2 nanowires synthesized by a hydrothermal method. Both the response and recovery time are about 3 s, and are independent of the humidity. The sensitivity increases gradually as the humidity increases, and is up to 85 at 97% RH. The resistance d...

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Bibliographic Details
Published inNanotechnology Vol. 18; no. 14; pp. 145503 - 145503 (4)
Main Authors Fu, X Q, Wang, C, Yu, H C, Wang, Y G, Wang, T H
Format Journal Article
LanguageEnglish
Published IOP Publishing 11.04.2007
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Summary:Fast humidity sensors are reported that are based on CeO2 nanowires synthesized by a hydrothermal method. Both the response and recovery time are about 3 s, and are independent of the humidity. The sensitivity increases gradually as the humidity increases, and is up to 85 at 97% RH. The resistance decreases exponentially with increasing humidity, implying ion-type conductivity as the humidity sensing mechanism. A model based on the morphology and surface energy of the nanowires is given to explain these results further. Our experimental results indicate a pathway to improving the performance of humidity sensors.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/18/14/145503