Size of Cd(S,Se) quantum dots in glasses: Correlation between measurements by highhyphen;resolution transmission electron microscopy, smallhyphen;angle xhyphen;ray scattering, and lowhyphen;frequency inelastic Raman scattering

摘要

The average sizes of Cd(S,Se) quantum dots in glasses have been measured for the same samples by using three methods: highhyphen;resolution transmission electron microscopy, lowhyphen;frequency inelastic Raman scattering, and smallhyphen;angle xhyphen;ray scattering. Three samples with crystal sizes of 5.5ndash;8, 9ndash;12, and 17 nm have been studied. For each method the interaction mode and the underlying assumptions in measuring the size are discussed. The correlation between the measurements is good and points out a narrow size distribution. The discrepancies observed for the smallest sizes are discussed with respect to the probe and the interactions used by each technique. They may be ascribed to structural effects.