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Mitronika, M., Profili, J., Goullet, A., Stafford, L., Granier, A. & Richard-Plouet, M. (2020) Modification of the optical properties and nano-crystallinity of anatase TiO2nanoparticles thin film using low pressure O2 plasma treatment. Thin Solid Films, 709 138212.
Added by: Richard Baschera (2020-11-17 13:20:19) Last edited by: Richard Baschera (2020-11-17 14:02:26) |
| Type de référence: Article DOI: 10.1016/j.tsf.2020.138212 Numéro d'identification (ISBN etc.): 00406090 Clé BibTeX: Mitronika2020 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, PCM Créateurs: Goullet, Granier, Mitronika, Profili, Richard-Plouet, Stafford Collection: Thin Solid Films |
Consultations : 1/357
Indice de consultation : 6% Indice de popularité : 1.5% |
| Liens URLs https://linkinghub ... /S0040609020304211 |
| Résumé |
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TiO2 nanoparticles (NPs) thin films with a thickness of 50 nm and a core-shell nanostructure were prepared using the spin coating technique and were treated using an inductively coupled O-2 plasma at low pressure. While no significant features were observed during pumping, two kinetics can be identified during plasma processing using in situ spectroscopic ellipsometry. For very short plasma treatment times, the removal of solvent-based organic moieties surrounding TiO2 nanoparticles produces a densification of the inorganic TiO2 films. Such mineralization effect by the O-2 plasma treatment was confirmed by X-ray photoelectron microscopy. For larger time scales, the average size of TiO2 NPs rises and significant changes of the optical properties occur. While no significant changes in the film nanostructure were observed by Scanning Electron Microscopy, a rise in the crystallite size and an increase in the agglomeration of TiO2 nanoparticles were confirmed by Transmission Electron Microscopy and Atomic Force Microscopy, respectively. The mechanisms involved in such plasma-induced modification of nanostructured TiO2 thin films are discussed in line with the energy fluxes of plasma-generated species.
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