5 years ago

Pressure-Induced Disordering in SnO2 Nanoparticles

Pressure-Induced Disordering in SnO2 Nanoparticles
Régis Debord, Helainne T. Girão, Denis Machon, Maria A. Caravaca, Stéphane Daniele, Patrice Mélinon, Ricardo A. Casali, Thibaut Cornier
The high-pressure behavior of SnO2 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.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b04079

DOI: 10.1021/acs.jpcc.7b04079

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.