Morphological and structural evolution of gas-phase synthesized vanadium nanoparticle films induced by thermal treatment

0572148 - FZÚ 2024 RIV NL eng J - Článek v odborném periodiku
Hanková, A. - Košutová, T. - Hanuš, J. - Kuzminova, A. - Pleskunov, P. - Červená, M. - Zeman, P. - Khomiakova, N. - Hájek, František - Kylián, O.
Morphological and structural evolution of gas-phase synthesized vanadium nanoparticle films induced by thermal treatment.
Materials Chemistry and Physics. Roč. 301, June (2023), č. článku 127587. ISSN 0254-0584. E-ISSN 1879-3312
Institucionální podpora: RVO:68378271
Klíčová slova: gas aggregation source * nanoparticles * annealing * vanadium pentoxide
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 4.6, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.matchemphys.2023.127587

Temperature-driven genesis of morphology and structure of vanadium nanoparticle films fabricated by magnetron-based gas aggregation sources has been investigated. Three temperature regions were identified. Above 200 °C, the vanadium nanoparticles undergo rapid oxidation, which is accompanied by an abrupt change in their mass, crystallinity, morphology, and optical properties (absorbance, photoluminescence). According to XRD, an orthorhombic V2O5 phase becomes the only detectable crystalline phase in the films in this temperature range. Furthermore, the individual nanoparticles start to coalesce, rapidly forming rod-like structures. The size of such formed structures, as well as the size of crystallites, rapidly increases with the temperature. This lowers the specific surface area of the coatings and causes a shift in the optical band gap from 2.68 eV to 2.48 eV.

Trvalý link: https://hdl.handle.net/11104/0350423