کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1668049 | 1008862 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Gas sensors based on doped-CNT/SnO2 composites for NO2 detection at room temperature Gas sensors based on doped-CNT/SnO2 composites for NO2 detection at room temperature](/preview/png/1668049.png)
For the first time nitrogen or boron doped carbon nanotubes were added into a SnO2 matrix to develop a new hybrid CNTs/SnO2 gas sensors. The hybrid sensor is utilised to detect low ppb concentrations of NO2 in air, by measuring resistance changes of thin CNTs/SnO2 films. The tests are performed at room temperature. For comparison, pure SnO2 and N or B-substituted CNT sensors are also examined. Comparative gas sensing results reveal that the CNTs/SnO2 hybrid sensors exhibit much higher response towards NO2, at least by a factor of 10, and good baseline recovery properties at room temperature than the blank SnO2 and the N or B-substituted CNT sensors. This finding shows that doping SnO2 with low quantity of CNTs doped with heteroatoms can dramatically improve sensitivity.
Journal: Thin Solid Films - Volume 520, Issue 3, 30 November 2011, Pages 966–970