Particle formation by the dilution method using a miscible non-solvent

Particle formation by mixing a solution containing nucleated monomers with a miscible non-solvent, a procedure known as the dilution method, has been investigated in order to check the validity of our previous model of homoge neous nucleation where the growth rate of nuclei is controlled by the diffu sion of monomers. Two types of experiments have been carried out: (i) prepa ration of sulfur particles by mixing a sulfur solution with pure water (whi ch is a miscible nonsolvent for sulfur) and (ii) generation of lead chlorid e particles by mixing a lead chloride solution with ethanol (a miscible non -solvent for lead chloride). In both cases, the experimentally measured par ticle number concentration and mean volume diameter are in good agreement w ith the predictions of the model. Our model can thus be applied also to par ticle preparation by the dilution method.