Abstract
This paper describes specific features of supercritical hydrothermal synthesis method of nanoparticles. In the method, metal salt aqueous solution is mixed with high temperature water to rapidly increase the temperature of the metal salt solution and thus reduce the reactions and crystallizations during the heating up period. By using this method, we succeeded in the continuous and rapid production of nano meter size single crystals. Specific features of this method is l) rapid nanoparticles production, 2) morphology control with a little change of temperature or pressure, 3) control of oxidation state by introducing oxygen or hydrogen gas, and 4) highly crystallized single crystal formation. By introducing organic reagents in the reaction atmosphere, organic-inorganic fused materials could be synthesized. For the rational design of this process, a thermo^fluid model combined with nucleation and particle growth theory has been developed.
