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Título: | Aerosol-assisted CVD-grown WO₃ nanoneedles decorated with copper oxide nanoparticles for the selective and humidity-resilient detection of H₂S |
Autor: | Annanouch, Fatima E; Haddi, Zouhair; Vallejos, Stella; Umek, Polona; Guttmann, Peter; Bittencourt, Carla; Llobet, Eduard | Palabras clave: | aerosol-assisted CVD; functionalization; gas sensor; nanoneedles; nanoparticles | Fecha de publicación: | 1-abr-2015 | Editor: | American Chemical Society | Citación: | ACS Applied Materials and Interfaces | Resumen: | A gas-sensitive hybrid material consisting of Cu2O nanoparticle-decorated WO3 nanoneedles is successfully grown for the first time in a single step via aerosol-assisted chemical vapor deposition. Morphological, structural, and composition analyses show that our method is effective for growing single-crystalline, n-type WO3 nanoneedles decorated with p-type Cu2O nanoparticles at moderate temperatures (i.e., 380 °C), with cost effectiveness and short fabrication times, directly onto microhot plate transducer arrays with the view of obtaining gas sensors. The gas-sensing studies performed show that this hybrid nanomaterial has excellent sensitivity and selectivity to hydrogen sulfide (7-fold increase in response compared with that of pristine WO3 nanoneedles) and a low detection limit (below 300 ppb of H2S), together with unprecedented fast response times (2 s) and high immunity to changes in the background humidity. These superior properties arise because of the multiple p-n heterojunctions created at the nanoscale in our hybrid nanomaterial. | Versión del editor: | 10.1021/acsami.5b00411 | URI: | http://hdl.handle.net/10261/345711 | DOI: | 10.1021/acsami.5b00411 | ISSN: | 19448244 |
Aparece en las colecciones: | (IMB-CNM) Artículos |
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Aerosolassisted-CVDgrown-WOsub3sub-nanoneedles-decorated-with-copper-oxide-nanoparticles-for-the-selective-and-humidityresilient-detection-of-Hsub2subSACS-Applied-Materials-and-Interfaces.pdf | Artículo principal | 5,23 MB | Adobe PDF | Visualizar/Abrir |
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