TY - JOUR
T1 - Elastic vibrations of spheroidal nanometric particles
AU - Hernández-Rosas, Juan
AU - Picquart, Michel
AU - Haro-Poniatowski, Emmanuel
AU - Kanehisa, Makoto
AU - Jouanne, Michel
AU - Morhange, Jean François
PY - 2003/11/12
Y1 - 2003/11/12
N2 - Particles of nanometric size show low-frequency vibrational modes that can be observed by Raman spectroscopy. These modes involve the collective motion of large numbers of atoms and it is possible to calculate their frequency using elasticity theory. In this work a simple model for oblate-shaped nanoparticles is developed and compared with experimental results obtained in bismuth nanoparticles. It is found that the agreement between theory and experiment is improved in comparison to the spherical model usually employed. However for the smallest particles the elastic model is no longer valid and lattice discreteness has to be considered.
AB - Particles of nanometric size show low-frequency vibrational modes that can be observed by Raman spectroscopy. These modes involve the collective motion of large numbers of atoms and it is possible to calculate their frequency using elasticity theory. In this work a simple model for oblate-shaped nanoparticles is developed and compared with experimental results obtained in bismuth nanoparticles. It is found that the agreement between theory and experiment is improved in comparison to the spherical model usually employed. However for the smallest particles the elastic model is no longer valid and lattice discreteness has to be considered.
UR - http://www.scopus.com/inward/record.url?scp=0345283357&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/15/44/004
DO - 10.1088/0953-8984/15/44/004
M3 - Artículo
SN - 0953-8984
VL - 15
SP - 7481
EP - 7487
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 44
ER -