Phonon confinement effect in calcium fluoride nanoparticles

Pier Carlo Ricci; Alberto Casu; Giovanni De Giudici; Paolo Scardi; Alberto Anedda

doi:10.1016/j.cplett.2007.06.135

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 journal › Article › peer-review

7 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 language	English (US)
Pages (from-to)	145-148
Number of pages	4
Journal	Chemical Physics Letters
Volume	444
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2007.06.135
State	Published - Aug 17 2007
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Phonon confinement effect in calcium fluoride nanoparticles",

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.",

author = "Ricci, {Pier Carlo} and Alberto Casu and Giudici, {Giovanni De} and Paolo Scardi and Alberto Anedda",

year = "2007",

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doi = "10.1016/j.cplett.2007.06.135",

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journal = "Chemical Physics Letters",

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T1 - Phonon confinement effect in calcium fluoride nanoparticles

AU - Ricci, Pier Carlo

AU - Casu, Alberto

AU - Giudici, Giovanni De

AU - Scardi, Paolo

AU - Anedda, Alberto

PY - 2007/8/17

Y1 - 2007/8/17

N2 - 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.

AB - 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.

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DO - 10.1016/j.cplett.2007.06.135

M3 - Article

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VL - 444

SP - 145

EP - 148

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-3

ER -

Phonon confinement effect in calcium fluoride nanoparticles

Abstract

ASJC Scopus subject areas

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