NANOSTRUCTURES IN GLASSES PROBED BY LOW-FREQUENCY RAMAN-SCATTERING

The interest of low-frequency Raman scattering for the study of materi als at the nanometric scale is demonstrated. The linear dependence bet ween the Raman shift and the inverse of the diameter of the nanostruct ures makes it a good tool to follow the kinetic of growth of crystalli ne inhomogeneities in semi-conductor quantum dots or in precursors of glass ceramics. In glasses it appears as one of the few ways to invest igate medium-range order and suggests a non-continuous structure. Exte nsion towards the study of phase transformations in semi-conductor nan ostructures or the evolution of the medium range order structure of gl ass with fictive temperature is in progress.