Electrical Characterization of Hydrothermally Synthesized Manganese Dioxide Nanowires with Regard to NO<inf>2</inf> Adsorption/Desorption Thermodynamics †
Self-assembled MnO2 nanowires were hydrothermally synthesized and electrically characterized under different conditions. The nanowires were approximately 3–10 µm long and about 20–100 nm in diameter. Single nanowires were aligned perpendicularly across two parallel gold electrode transducers by mean...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/351434 |
| Acceso en línea: | http://hdl.handle.net/10261/351434 https://api.elsevier.com/content/abstract/scopus_id/85186472547 |
| Access Level: | acceso abierto |
| Palabra clave: | Arrhenius plot | defect structure | gas sensing | ion mobility | manganese dioxide | nanowires | nitrogen dioxide | structural instability | variable oxidation state |
| Sumario: | Self-assembled MnO2 nanowires were hydrothermally synthesized and electrically characterized under different conditions. The nanowires were approximately 3–10 µm long and about 20–100 nm in diameter. Single nanowires were aligned perpendicularly across two parallel gold electrode transducers by means of the dielectrophoresis (DEP) technique. Resistivity changes in synthetic air, nitrogen, and NO2 were tested in a range from 100 °C up to 300 °C. The resistivity changes were observed to account for the oxygen reduction on the NWs’ surface as the electrons were moving from the NWs to the oxygen. The resistivity was explored through a constant current arrangement test. Based on the resistivity changes, electrical properties, such as activation energy and type of semiconductor, were estimated. |
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