| Adsorption-controlled transition of the electrical properties realized in Hematite（alpha-Fe2O3） nanorods ethanol sensing |
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| 引用本文： | 王翀,王菲菲,付星球,张恩迪,许志. Adsorption-controlled transition of the electrical properties realized in Hematite（alpha-Fe2O3） nanorods ethanol sensing[J]. 中国物理 B, 2011, 20(5): 50701-050701 |
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| 作者姓名： | 王翀 王菲菲 付星球 张恩迪 许志 |
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| 作者单位： | School of Opto-electronic Information Science and Technology,Yantai University School of Physics,Ludong University Mathematics and Physics Department,North China Electric Power University Micro-Nano Technologies Research Center,Hunan University |
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| 基金项目： | Project supported by the National Basic Research Program of China (Grant No. 2007CB310500), the National Natural Science Foundation of China (Grant No. 90606009), the Funds for Doctor of Yantai University, China (Grant No. WL08B8), the Funds for Doctor of |
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| 摘 要： | Alpha-Fe2O3 nanorods are synthesized through a hydrothermal method with no surfactant introduced and ethanol sensors are fabricated from these nanorods.The device can respond to ethanol vapour in a concentration range from 1 to 1500 parts per million and shows both p-type and n-type responding characteristics during the investigation of the ethanol sensing.The sensor displays a p-type characteristic when the ethanol concentration is low and converted into an n-type characteristic as the concentration exceeds a certain value.Such a phenomenon is attributed to the chemisorbed oxygen,which leads to different modifications of the energy band at the surface,namely,depletion layer or inversion layer.
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| 关 键 词： | adsorption sensing depletion oxygen |
| 收稿时间： | 2010-10-16 |
Adsorption-controlled transition of the electrical properties realized in Hematite (alpha-Fe2O3) nanorods ethanol sensing |
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| Wang Chong,Wang Fei-Fei,Fu Xing-Qiu,Zhang En-Di and Xu Zhi. Adsorption-controlled transition of the electrical properties realized in Hematite (alpha-Fe2O3) nanorods ethanol sensing[J]. Chinese Physics B, 2011, 20(5): 50701-050701 |
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| Authors: | Wang Chong Wang Fei-Fei Fu Xing-Qiu Zhang En-Di Xu Zhi |
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| Affiliation: | School of Opto-electronic Information Science and Technology, Yantai University, Yantai 264005, China;School of Physics, Ludong University, Yantai 264025, China;Mathematics and Physics Department, North China Electric Power University, Beijing 102206, China;Micro-Nano Technologies Research Center, Hunan University, Changsha 410082, China;Micro-Nano Technologies Research Center, Hunan University, Changsha 410082, China |
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| Abstract: | Alpha-Fe2O3 nanorods are synthesized through a hydrothermal method with no surfactant introduced and ethanol sensors are fabricated from these nanorods. The device can respond to ethanol vapour in a concentration range from 1 to 1500 parts per million and shows both p-type and n-type responding characteristics during the investigation of the ethanol sensing. The sensor displays a p-type characteristic when the ethanol concentration is low and converted into an n-type characteristic as the concentration exceeds a certain value. Such a phenomenon is attributed to the chemisorbed oxygen, which leads to different modifications of the energy band at the surface, namely, depletion layer or inversion layer. |
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| Keywords: | adsorption sensing depletion oxygen |
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