Pressure-Induced Disordering in SnO2 Nanoparticles
Source abstract
Abstract
The high-pressure behavior of SnO 2 nanoparticles (∼2.8 nm) was studied up to approximately 20 GPa using Raman spectroscopy in a diamond anvil cell and ab initio simulations. Above ∼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 nanoparticle 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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Mechanical and Optical Resonators · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Université de Lyon, F-69000 Lyon, France
Institut Lumière Matière, CNRS, UMR 5306, Université Lyon 1, F-69622 Villeurbanne, France
IRCELYON, CNRS-UMR 5256, Universite̋ Lyon 1, 2 Avenue A. Einstein, 69626 Villeurbanne Cedex, France
Departamento de Física y Química, Facultad de Ingeniería, UNNE, Avenida Las Heras 727, C.P. 3500 Resistencia, Argentina
Departamento de Física, Facultad de Ciencias Exactas y Naturales y Agrimensura, UNNE, Avenida Libertad 5600, C.P. 3400 Corrientes, Argentina
Funding
Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico
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