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Université Jean Monnet – Saint-Etienne |  |
Journal articles
Changes in the Chemical and Structural Properties of Nanocomposite Ag:TiO2 Films during Photochromic Transitions
Abstract : This study focuses on changes in the oxidation state of silver and in the crystalline phase of TiO2 occurring during the photochromic transitions of amorphous nanocomposite mesoporous Ag:TiO2 films exposed to ultraviolet and visible laser light. The chemical and phase transformations have been investigated by ultraviolet–visible spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, high-angle annular dark field scanning transmission electron microscopy, and high-resolution transmission electron microscopy. The results bring to the fore the presence of both silver nanoparticles in face-centered cubic and hexagonal crystalline phases during the photochromic transitions and a large amount of oxidized silver nanoparticles after visible light exposure, along with nucleation of some TiO2 crystals despite the very low intensity used.
https://hal-ujm.archives-ouvertes.fr/ujm-01076550
Contributor : Nicolas Crespo-Monteiro <>
Submitted on : Wednesday, October 22, 2014 - 2:39:26 PM
Last modification on : Wednesday, July 8, 2020 - 12:42:39 PM
Contributor : Nicolas Crespo-Monteiro <>
Submitted on : Wednesday, October 22, 2014 - 2:39:26 PM
Last modification on : Wednesday, July 8, 2020 - 12:42:39 PM