期刊
JOURNAL OF APPLIED SPECTROSCOPY
卷 75, 期 4, 页码 576-582出版社
SPRINGER
DOI: 10.1007/s10812-008-9074-x
关键词
nanocrystal; cadmium sulfide; sol-gel technology; optical and luminescent properties; quantum size effect; dispersion; stabilizer
类别
Based on analysis of optical absorption data for CdS nanocrystals obtained by sol-gel technology in gelatin, we have studied the effect of technological factors (reagent concentrations, gelatin concentration) on the growth process and size distribution of the synthesized nanocrystals. Depending on the reagent concentration, we synthesized CdS nanocrystals with mean radii in the range (r) over bar = 1.9-2.4 nm. We have shown that for a low gelatin content (1%), nanocrystals of different sizes are formed (1.7 nm and 2.6 nm). With an increase in the gelatin concentration, the size dispersion decreases and nanocrystals of a single mean radius (2.3 nm) are formed. We have established a correlation between the size dispersion and the shape of the photoluminescence spectrum of the CdS nanocrystals.
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