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VO2 nanostructures based chemiresistors for low power energy consumption hydrogen sensing |
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| Authors: | Aline Simo Bonex Mwakikunga Bertrand T. Sone Basil Julies Reginaldt Madjoe Malik Maaza |
| Affiliation: | 1. Nanosciences African Network (NANOAFNET), Materials Research Department, iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West 7129, PO Box 722, Somerset West, Western Cape Province, South Africa;2. Physics Dept., University of Western Cape, Bellville, 7535 Cape Town, South Africa;3. National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, PO Box 395, Pretoria 0001, South Africa;4. UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk ridge, PO Box 392, Pretoria, South Africa |
| Abstract: | Mott-type VO2 oxide nanobelts are demonstrated to be effective hydrogen gas sensors at room temperature. These nanobelts, synthesized by hydrothermal process and exhibiting the VO2 (A) crystallographic phase, display room temperature H2 sensitivity as low as 0.17 ppm. The nanobelts (ultralong belt-like) nanostructures could be an ideal system for fully understanding dimensionally confined transport phenomena in functional oxides and for building functional devices based on individual nanobelts. |
| Keywords: | Hydrogen gas sensing Vanadium dioxide nanobelts Mott type oxides Size effects Surface-interface Low power consumption |
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