| Téléchargement | - Voir le manuscrit accepté : Copper tungstate thin-films for nitric oxide sensing (PDF, 663 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1016/j.snb.2012.06.067 |
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| Auteur | Rechercher : Gonzalez, C. M.1; Rechercher : Du, X.1; Rechercher : Dunford, J. L.1; Rechercher : Post, M. L.1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut de technologie des procédés chimiques et de l'environnement du CNRC
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| Format | Texte, Article |
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| Sujet | Electrochemical sensors; Conductometric sensors; Gas sensors; NOx sensors; Gas-phase pollutants; Environment monitoring technologies; Thin-films; Semiconducting metal-oxides |
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| Résumé | CuWO4 thin-films prepared by the pulsed laser deposition technique were studied for monitoring nitric oxide (NO) in the concentration range of 10 < [NO] < 400 ppm under synthetic air. The thin-film films were characterized by X-ray diffraction (XRD), depth-profilometry and electron transport measurements. The CuWO4 thin-film response to O2 confirmed an n-type conductivity. Monitoring the thin-film conductometric response to NO at both 300 and 500 °C revealed the operation of a temperature-dependent mechanism for detection. At 300 °C, increasing [NO] produced a consistent increment in thin-film resistance, while at 500 °C the thin-film resistance decreased with [NO]. At 500 °C, a transient response was systematically observed. The chemical origin of the transient is discussed. The estimation of response factors to NO exposure in the presence of high [O2] indicates a significantly higher selectivity to NO. Extensive conductometric measurements show that the thin-films feature good electronic and thermal stability over time. |
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| Date de publication | 2012-07-08 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro du CNRC | NRCC 53072 |
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| Numéro NPARC | 21022826 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 91216a28-404e-4d8c-809a-1dc56372b15f |
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| Enregistrement créé | 2012-11-23 |
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| Enregistrement modifié | 2020-04-21 |
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