Ag-doped WO3 nanostructure films for organic volatile gas sensor application
| Autor: | P. Sreedhara Reddy, G. Adilakshmi, R. Subba Reddy, Ch. Seshendra Reddy, A. Sivasankar Reddy |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Nanostructure Materials science Scanning electron microscope Energy-dispersive X-ray spectroscopy Condensed Matter Physics Microstructure 01 natural sciences Electron beam physical vapor deposition Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials X-ray photoelectron spectroscopy Chemical engineering 0103 physical sciences Electrical and Electronic Engineering Thin film Diffractometer |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 31:12158-12168 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-020-03762-4 |
| Popis: | A novel gas sensor based on Ag-doped WO3 nanostructures was successfully deposited on a glass substrate via electron beam evaporation technique. The microstructure, surface morphology, chemical composition, crystal structure, and optical properties of the pure and Ag-doped WO3 nanostructure thin films were studied by scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffractometer, and photoluminescence spectroscopy (PL). Gas-sensing tests revealed that the 15 wt% Ag-doped WO3 nanostructure possess excellent gas-sensing performance for ethanol. The sensitivity of the material toward 100 ppm ethanol was as high as 65 at an optimum operating temperature of 300 °C, which is higher than that of undoped WO3. The response/recovery times 9 s/11 s, great selectivity and outstanding long-term stability was obserevd for the 15 wt% Ag doped WO3 nanostructure sensor. The improvement of ethanol-sensing performance is related to the active space charge regions around the interface of Ag particles and WO3. |
| Databáze: | OpenAIRE |
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