Abstract
Our previous model for simultaneous homogeneous and heterogeneous nucleation, which was successfully tested for silver particle generation by a chemical reduction method, is extended to the case of slow reaction rate. Nucleation in a system containing seed particles in the case where the reaction rate is slow occurs according to the following rule: homogeneous nucleation is predominant when np/n0*,>1 (np is the seed number concentration, and n0* the number concentration of homogeneously nucleated particles without seed particles), and heterogeneous nucleation is predominant when np/n0*<1. This theoretical prediction is in good agreement with the experimental results obtained for zinc sulfide particles generated by homogeneous precipitation.
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