Size effects in the vibrational spectrum of 10-A selenium particles
Bogomolov V. N., Poborchii V. V., Kholodkevich S. V.
Raman spectra of ensembles of isolated and bound 10-A clusters of Se (a three-dimensional network) have been measured over the range 10-300 cm-1. Size effects have been discovered: discrete structure in the vibrational spectrum of an isolated cluster and an increase in the matrix element for Raman scattering by low-frequency modes. These size effects are seen for clusters of both types.