Thermal treatment-dependent chemical composition of ternary CdS_(1-x)Se_x nanocrystals grown in borosilicate glass

摘要

Variation of the chemical composition of ternary CdS_(1-x)Se_x nanocrystals grown in borosilicate glass depending on the thermal treatment is studied by resonant Raman spectroscopy. It is shown that only for the nanocrystals with roughly equal content of substitutive S and Se chalcogen atoms (0.4 < x < 0.6) the nanocrystal composition is independent of the thermal treatment parameters. In other cases an increase of the thermal treatment temperature (625-700℃) and duration (2-12 h) results in a considerable increase of the predominant chalcogen content in the nanocrystals.