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Article Dans Une Revue Journal of Physical Chemistry C Année : 2017

Pressure-Induced Disordering in SnO2 Nanoparticles

H. T. Girao
  • Fonction : Auteur
T. Cornier
  • Fonction : Auteur
S. Daniele
R. Debord
M. A. Caravaca
  • Fonction : Auteur
R. A. Casali
  • Fonction : Auteur
P. Melinon
  • Fonction : Auteur

Résumé

The high-pressure behavior of SnO2 nanoparticles (similar to 2.8 nm) was studied up to approximately 20 GPa using Raman spectroscopy in a diamond anvil cell and ab initio simulations. Above similar to 7 GPa, the disordering, initially located at the surface, was found to propagate to the core of nanoparticles, ultimately leading to amorphous-like spectra. This observation can be interpreted as a disordering of the oxygen sublattice sensitively probed by Raman spectroscopy in contrast to powder X-ray diffraction techniques. The low -frequency mode can'be related to the nanopartide vibration as an elastic isotropic sphere motion. The pressure-induced shift of this mode allows for the constraining of the mechanical properties data reported in the literature.
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Dates et versions

hal-01580215 , version 1 (01-09-2017)

Identifiants

Citer

H. T. Girao, T. Cornier, S. Daniele, R. Debord, M. A. Caravaca, et al.. Pressure-Induced Disordering in SnO2 Nanoparticles. Journal of Physical Chemistry C, 2017, 121 (28), pp.15463-15471. ⟨10.1021/acs.jpcc.7b04079⟩. ⟨hal-01580215⟩
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