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

Authors

  • Yong Gang DU
  • Hai Xia ZHENG
  • Hao NI

DOI:

https://doi.org/10.5755/j01.ms.22.2.12925

Keywords:

gas sensor, carbon nanotube, heterojunction

Abstract

We report a room-temperature (RT) hydrogen gas (H2) 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 H2 were measured. The experimental results reveal that the Pd-SWNTs/Si heterojunction exhibits high H2 response. After exposure to 0.02 %, 0.05 %, and 0.1 % H2 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.

DOI: http://dx.doi.org/10.5755/j01.ms.22.2.12925

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Published

2016-06-01

Issue

Vol. 22 No. 2 (2016)

Section

ELECTRONIC AND OPTICAL MATERIALS

License

 

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