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Vibrational density of states in silicon carbide nanoparticles : experiments and numerical simulations

Abstract : The vibrational properties of silicon carbide nanoparticles (np-SiC) were investigated as function of the nanocrystal size (5-25 nm) and the features of their outermost surfaces. Raman experiments and numerical methods were conjugated to characterize the signatures from the active SiC normal modes and the vibrational density of states (VDOS). The Raman spectra of the nanopowders were marked by VDOS signals which correlate with the SiC amorphous fractions favoured by the high specific surfaces of the nanoparticles and their surface reconstruction. Quantitative interpretation of the experimental VDOS features, IR absorption and Raman scattering properties in nanosized SiC were carried out by means of numerical methods developed on SiC clusters with suitable structures and sizes.
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https://hal-unilim.archives-ouvertes.fr/hal-00916050
Contributeur : Johann Bouclé <>
Soumis le : lundi 9 décembre 2013 - 16:35:44
Dernière modification le : mercredi 25 mars 2020 - 09:21:00

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  • HAL Id : hal-00916050, version 1

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Malgorzata Makowska-Janusik, Abdelhadi Kassiba, Johann Bouclé, Jean-François Bardeau, S. Kodjikian, et al.. Vibrational density of states in silicon carbide nanoparticles : experiments and numerical simulations. Journal of Physics: Condensed Matter, IOP Publishing, 2005, 17, pp.5101-5110. ⟨hal-00916050⟩

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