Raman scattering on the l=2 spheroidal mode of spherical nanoparticles (CROSBI ID 545141)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Ristić, Davor ; Ivanda, Mile ; Furić, Krešimir ; Montagna, M. ; Ferrari, M. ; Chiasera, A. ; Jestin, Y.
engleski
Raman scattering on the l=2 spheroidal mode of spherical nanoparticles
The Raman light to vibrations coupling coefficients C(ν ) of quadrupolar and symmetrical vibrational modes of spherical nanoparticles embedded in a matrix are calculated. In contrast to the symmetrical mode, the C(ν ) of the quadrupolar modes consists of the longitudinal and transversal sound velocity contributions. It is shown, that depending on the ratio of longitudinal and transverse sound velocity, these two contributions can interfere constructively or destructively resulting in enhancing or vanishing of some radial modes. Different peaks in the C(ν ) spectrum were attributed to transverse and longitudinal spheroidal modes and the longitudinal spheroidal modes were found to have a higher Raman intensity than the transverse modes. The theoretical model was tested on a sample of HfO2 nanoparticles in a silica matrix.
Raman scattering ; nanoparticles ; low frequency vibrational modes
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Podaci o prilogu
132-137.
2008.
objavljeno
10.4028/www.scientific.net/AST.55.132
Podaci o matičnoj publikaciji
Advances in Science and Technology (Volume 55) - Smart Optics
Vincenzini, Pietro ; Righini, Giancarlo Cesare
Trans Tech Publications
3-908158-21-4
Podaci o skupu
CIMTEC 2008
predavanje
08.05.2008-13.05.2008
Acireale, Italija