Abstract
Water-soluble CdSe nanoparticles have been synthesized from aqueous solution of selenosulfate by using mercaptocarboxylic acid as stabilizer. A comprehensive investigation is presented on the growth mechanism of CdSe nanoparticles and the factors determining the size. The growth mechanism of CdSe nanoparticles composed two kinds of growth mode, aggregation and Ostwald ripening. The growth rate and product properties can be controlled by changing the reaction conditions. The best conditions, for synthesis of CdSe nanoparticles in the current system, are the pH value in the range of 9-10 and a large excess of the cadmium precursor. The structure of CdSe nanoparticles has been studied by using XRD, TEM, and HRTEM.
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