| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1673964 | Thin Solid Films | 2008 | 4 Pages |
Abstract
SnO2 hollow nanospheres have been synthesized by heat treatment of a mixture composed of SnCl4 and carbon microspheres. The SnO2 nanospheres are 100 nm in size and composed of large amount of SnO2 nanocrystals with diameters of ~ 6 nm, which is close to two times of the Debye length of SnO2. It was found that the sensitivity to 1000 ppm ethanol obtained with SnO2 hollow nanosphere-based sensors is as high as 75. The response and recovery time are only 4 and 10 s, respectively. Such excellent sensing properties can be ascribed to the small-size nanocrystals and porous structure of SnO2 hollow nanospheres, which lead to large diffusion constant.
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Physical Sciences and Engineering
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Authors
Yu Tan, Chengchao Li, Yong Wang, Jianfeng Tang, Xicheng Ouyang,