| Abstract
| - In solution phase synthesis of nanoparticles, processes such as coarsening and aggregation can compete withnucleation and growth in modifying the particle size distribution in the system. We report on the synthesis ofZnO nanoparticles from Zn(CH3CO2)2, ZnBr2, and Zn(ClO4)2 in 2-propanol. For synthesis from Zn(CH3CO2)2 and ZnBr2, nucleation and growth are fast and are followed by diffusion-limited coarsening. For synthesisfrom Zn(ClO4)2, diffusion-limited coarsening is observed at shorter times whereas at longer times the particlesize increases more rapidly. The rate constant for coarsening at constant temperature increases in the orderBr-< CH3CO2-< ClO4- indicating that the rate is dependent on anion adsorption. The temperature dependenceof the rate constant for coarsening is due to the temperature dependence of the solvent viscosity and thetemperature dependence of the bulk solubility of ZnO.
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