Abstract
Numerical simulation has been performed for the process of nucleation and growth of nanoparticles in the presence of surfactants. Surfactant molecules are adsorbed on the surface of nanoparticles and decelerate their growth in supersaturated solutions. It has been assumed that nanoparticles are completely blocked after a certain degree of surface coverage is achieved, and they cease to grow. It has been demonstrated that, at low concentrations, surfactants influence the average size and the width of the size distribution of nanoparticles; i.e., the average particle size decreases and the distribution becomes narrower with the growth of surfactant concentration. At high concentrations, the effect of surfactants is more dramatic; namely, the particle size distribution becomes bimodal. At high surfactant concentrations, the periodic supply of a precursor, which serves as a source of monomers (metal atoms), may result in the formation of polymodal ensembles of the nanoparticles.
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Original Russian Text © E.Yu. Bol’shagin, V.I. Roldughin, 2012, published in Kolloidnyi Zhurnal, 2012, Vol. 74, No. 6, pp. 680–686.
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Bol’shagin, E.Y., Roldughin, V.I. Kinetics of nucleation and growth of metal nanoparticles in the presence of surfactants. Colloid J 74, 649–654 (2012). https://doi.org/10.1134/S1061933X12060038
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DOI: https://doi.org/10.1134/S1061933X12060038