Effect of annealing on nanoparticle-based composite CuO-WO3 thin films for gas sensing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F24%3A43972657" target="_blank" >RIV/49777513:23520/24:43972657 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of annealing on nanoparticle-based composite CuO-WO3 thin films for gas sensing

Popis výsledku v původním jazyce

Conductometric gas sensors based on metal oxide semiconductors often require high operating temperatures to achieve adequate sensing responses without catalyst. Understanding the impact of temperature on the microstructure and fundamental processes within the sensor is hence crucial. In this study, we investigated the effect of annealing on individual thin films composed of n-WO3 and p-CuO nanoparticles (NPs), as well as on a layered composite of n-WO3/p-CuO NPs synthesized using a magnetron-based gas aggregation source. The films were annealed under synthetic air conditions in a furnace at high temperatures, followed by characterization studies. An increase in crystallinity and grain size were observed with annealing for the CuO and WO3 NP-based thin films. However, the composite sample exhibited a distinctive microstructural evolution with notable thermal stability, and completely crystallized into the CuWO4 phase at 550 °C. Subsequently, the effect of microstructural evolution on hydrogen sensing characteristics is also investigated.

Název v anglickém jazyce

Effect of annealing on nanoparticle-based composite CuO-WO3 thin films for gas sensing

Popis výsledku anglicky

Conductometric gas sensors based on metal oxide semiconductors often require high operating temperatures to achieve adequate sensing responses without catalyst. Understanding the impact of temperature on the microstructure and fundamental processes within the sensor is hence crucial. In this study, we investigated the effect of annealing on individual thin films composed of n-WO3 and p-CuO nanoparticles (NPs), as well as on a layered composite of n-WO3/p-CuO NPs synthesized using a magnetron-based gas aggregation source. The films were annealed under synthetic air conditions in a furnace at high temperatures, followed by characterization studies. An increase in crystallinity and grain size were observed with annealing for the CuO and WO3 NP-based thin films. However, the composite sample exhibited a distinctive microstructural evolution with notable thermal stability, and completely crystallized into the CuWO4 phase at 550 °C. Subsequently, the effect of microstructural evolution on hydrogen sensing characteristics is also investigated.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20506 - Coating and films

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů