Abstract
The hydrogen sensing behavior of ZnO thin films decorated with Pt nanoparticles (PtNPs@ZnO) that were fabricated by sequential sputtering and annealing at 600 °C is reported. The structural, morphological, and compositional properties of these thin films were investigated using various analytical techniques. The H2 sensing performance of the PtNPs@ZnO sensor was investigated as a function of both the gas concentration and the operating temperature. It was found that the PtNPs@ZnO sensor shows high response and excellent repeatability at low hydrogen concentration. The effect of the Pt density (number of Pt nanoparticles per unit area) on the gas sensing properties of PtNPs@ZnO sensors was also investigated. The H2 sensing performance of sensors decorated with Ag and Au nanoparticles was investigated to clarify the electrical and chemical sensing mechanisms. It was found that the electrical mechanism dominates the improvement in the H2 sensing behavior.
| Original language | English |
|---|---|
| Pages (from-to) | 12378-12384 |
| Number of pages | 7 |
| Journal | Ceramics International |
| Volume | 42 |
| Issue number | 10 |
| DOIs | |
| State | Published - 1 Aug 2016 |
Bibliographical note
Publisher Copyright:© 2016 Elsevier Ltd and Techna Group S.r.l.
Keywords
- Electrical and chemical sensing mechanisms
- Hydrogen gas sensor
- Pt nanoparticles
- Thin films
- ZnO
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry
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