Phase transition study in strongly correlated VO 2 based sensing systems
| Autor: | K. Kaviyarasu, A. Simo, Malik Maaza, R. Madjoe, Bonex W. Mwakikunga, A Gibaud |
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| Rok vydání: | 2017 |
| Předmět: |
Diffraction
Phase transition Materials science Nanostructure Inorganic chemistry Analytical chemistry 02 engineering and technology 01 natural sciences Metal chemistry.chemical_compound 0103 physical sciences Acetone Physical and Theoretical Chemistry Spectroscopy 010302 applied physics Radiation 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry visual_art visual_art.visual_art_medium Methanol 0210 nano-technology Selectivity Monoclinic crystal system |
| Zdroj: | Journal of Electron Spectroscopy and Related Phenomena. 216:23-32 |
| ISSN: | 0368-2048 |
| DOI: | 10.1016/j.elspec.2017.01.011 |
| Popis: | Intermediate phase monoclinic M2 was observed by inducing in situ X-ray thermo diffraction on VO2 (M) nanoplatelets. The solid-solid phase transition occurs at around 65 °C assisted with the percolative transition metal-insulator. The existence of an intermediate crystalline phase with room temperature insulator phase and high temperature metallic phase across MIT in VO2 could be of relevance to understand structural contributions to the phase transition dynamics. In addition, pellet of VO2 nanostructures have shown to present good sensing properties to various alcohols vapors at room temperature and good selectivity of methanol with 5.54% sensitivity and limit detection below 5 ppm, compared to isopropanol 3.2% and acetone 2.4% respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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