Abstract
A new principle of producing nano-particles from ternary solutions is proposed and was demonstrated with the NaCl–KCl-water system. For this system, local high supersaturation with respect to KCl was created by dissolving the second solute (NaCl) in aqueous solutions that was saturated or slightly supersaturated with respect to the first solute (KCl). This high local supersaturation then induced spontaneous nucleation of the first solute in the vicinity of or at the surfaces of the dissolving second solute crystals. The following results were found that the less the amount of the second solute, the smaller the particle size, and the lower the temperature the smaller the size. The minimum average size observed was about 350 nm. Thus the particle size could well be controlled by the two factors such as the amount and the size of seeds particles and the operating temperature.
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