期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 293, 期 -, 页码 517-526出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0022-3093(01)00769-4
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Nucleation and growth of CdTe1-xSx nanocrystals embedded in a borosilicate glass matrix and submitted to isothermal annealing were studied by small-angle X-ray scattering (SAXS). Two different sulfur contents (x = 0.3 and x = 0.7) were investigated. The formation and growth of the nanocrystals was studied in situ, maintaining the samples at a constant temperature (560 degreesC) inside a high-temperature cell. The effect of a nucleation pretreatment at 460 degreesC on the characteristics of nanocrystal formation and growth was also studied. The experimental results demonstrate that, in composites with high sulfur content (x = 0.7), nanocrystals grow during the isothermal annealing by coarsening of preformed small crystals. In glasses with low sulfur content (x = 0.3), nanocrystals grow by progressive diffusion of Cd, Te and S atoms initially dispersed in the glass matrix. (C) 2001 Elsevier Science B.V. All rights reserved.
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