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- Title
Enhanced Field Emission and Low-Pressure Hydrogen Sensing Properties from Al–N-Co-Doped ZnO Nanorods.
- Authors
Tu, Youqing; Qian, Weijin; Dong, Mingliang; Chen, Guitao; Quan, Youlong; Huang, Weijun; Dong, Changkun
- Abstract
ZnO nanostructures show great potential in hydrogen sensing at atmospheric conditions for good gas adsorption abilities. However, there is less research on low-pressure hydrogen sensing performance due to its low concentration and in-homogeneous distributions under low-pressure environments. Here, we report the low-pressure hydrogen sensing by the construction of Al–N-co-doped ZnO nanorods based on the adsorption-induced field emission enhancement effect in the pressure range of 10−7 to 10−3 Pa. The investigation indicates that the Al–N-co-doped ZnO sample is the most sensitive to low-pressure hydrogen sensing among all ZnO samples, with the highest sensing current increase of 140% for 5 min emission. In addition, the increased amplitude of sensing current for the Al–N-co-doped ZnO sample could reach 75% at the pressure 7 × 10−3 Pa for 1 min emission. This work not only expands the hydrogen sensing applications to the co-doped ZnO nanomaterials, but also provides a promising approach to develop field emission cathodes with strong low-pressure hydrogen sensing effect.
- Subjects
FIELD emission; NANORODS; ZINC oxide; GAS absorption &; adsorption; HYDROGEN; WEATHER; GLOW discharges
- Publication
Nanomaterials (2079-4991), 2024, Vol 14, Issue 10, p863
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano14100863