Abstract
In order to elucidate the mechanism of the CdS fine particles formation in microemulsions, the time courses of the spectra of CdS fine particles were measured both in the microemulsion and in the aqueous phase. The spectra of CdS fine particles in microemulsions depend on the water-pool size of the microemulsions. The rate of spectra change in microemulsions was much slower than that in the aqueous phase. At the initial stage of fine particle formation, the particle size changes reversibly. The behaviour cannot be interpreted by some models for the growth of the particles. It is inferred that the behaviours are caused by the surfactants in the microemulsions, but the role of surfactant in the formation cannot be proved.
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