Fast humidity sensors based on CeO2 nanowires

被引：115

作者：

Fu, X. Q.

Wang, C.

Yu, H. C.

Wang, Y. G.

Wang, T. H. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

[2] Hunan Univ, Micro Nano Technol Res Ctr, Changsha 410082, Peoples R China

来源：

NANOTECHNOLOGY | 2007年 / 18卷 / 14期

关键词：

D O I：

10.1088/0957-4484/18/14/145503

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

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页数：4

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