Phonon confinement effect in calcium fluoride nanoparticles

Pier Carlo Ricci*, Alberto Casu, Giovanni De Giudici, Paolo Scardi, Alberto Anedda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Nanocrystalline CaF2 were obtained by ball-milled synthetic fluorite powders. Raman spectra of nanocrystals with average sizes of 10-25 nm are reported and the correlation between the band shape of the only allowed Raman mode at 322 cm-1 and the crystals dimensions is discussed. While in such systems local temperature and pressure effects play a minor role, variations in the shape of the Raman band can be correctly reproduced by a model based on the phonon confinement that effectively takes into account the anisotropy of the phonon dispersion curve.

Original languageEnglish (US)
Pages (from-to)145-148
Number of pages4
JournalChemical Physics Letters
Volume444
Issue number1-3
DOIs
StatePublished - Aug 17 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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