Thermally-induced microstructural evolution in nanoparticle-based CuO, WO3 and CuO–WO3 thin films for hydrogen gas sensing

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F25%3A43975828" target="_blank" >RIV/49777513:23520/25:43975828 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23640/25:43975828
Result on the web
<a href="https://doi.org/10.1016/j.apsadv.2025.100768" target="_blank" >https://doi.org/10.1016/j.apsadv.2025.100768</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apsadv.2025.100768" target="_blank" >10.1016/j.apsadv.2025.100768</a>

Result language
angličtina
Original language name
Thermally-induced microstructural evolution in nanoparticle-based CuO, WO3 and CuO–WO3 thin films for hydrogen gas sensing
Original language description
This study systematically investigates the microstructural evolution of nanoparticle-based CuO, WO3, and composite CuO–WO3 thin films induced by their post-deposition annealing. The films were reactively deposited using a magnetron-based gas aggregation technique, with the composite films consisting of alternating monolayers of CuO and WO3 nanoparticles. After deposition, the films were annealed in synthetic air at temperatures ranging from 200 to 400 °C and characterized using scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy. Annealing of the CuO films led to the most pronounced changes associated with a gradual enhancement of crystallinity accompanied by significant particle growth with increasing annealing temperature, while the WO3 and CuO–WO3 films were more thermally stable to crystallization and particle growth. Notably, at 400 °C, the CuO–WO3 films crystallized into a novel 𝛾-CuWO4 phase. The annealed films were further evaluated for their gas-sensing performance upon H2 exposure, and the obtained results were analysed in relation to film properties and the microstructural evolution induced by annealing.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20506 - Coating and films

Project
<a href="/en/project/EH22_008%2F0004572" target="_blank" >EH22_008/0004572: Quantum materials for applications in sustainable technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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