A Room-temperature Hydrogen Gas Sensor Using Palladium-decorated Single-Walled Carbon Nanotube/Si Heterojunction

作者：Du, Yong Gang^*; Zheng, Hai Xia; Ni, Hao

来源：Materials Science-Medziagotyra, 2016, 22(2): 209-212.

DOI：10.5755/j01.ms.22.2.12925

• gas sensor
• carbon nanotube
• heterojunction

We report a room-temperature (RT) hydrogen gas (H-2) sensor based on palladium-decorated single-walled carbon nanotube/Si (Pd-SWNTs/Si) heterojunction. The current-voltage (I-V) curves of the Pd-SWNTs/Si heterojunction in different concentrations of H-2 were measured. The experimental results reveal that the Pd-SWNTs/Si heterojunction exhibits high H-2 response. After exposure to 0.02 %, 0.05 %, and 0.1 % H-2 for 10 min, the resistance of the heterojunction increases dramatically. The response is 122 %, 269 % and 457 %, respectively. A simple interfacial theory is used to understand the gas sensitivity results. This approach is a step toward future CNTs-based gas sensors for practical application.

• 出版日期2016
• 单位中国石油大学（北京）