A general, reproducible, and simple synthetic method that employs readily available chemicals permits control of the size, shape, and size distribution of metal oxide nanocrystals. The synthesis entails reacting a metal fatty acid salt, the corresponding fatty acid, and a hydrocarbon solvent, with the reaction product being pyrolyzed to the metal oxide. Nearly monodisperse oxide nanocrystals of Fe3O4, Cr2O3, MnO, Co3O4, NiO, ZnO, SnO2, and In2O3, in a large size range (3-50 nm), are described. Size and shape control of the nanocrystals is achieved by varying the reactivity and concentration of the precursors.
Chemistry and Biochemistry
Board of Trustees of the University of Arkansas (Little Rock, AR)
Peng, Xiaogang; Chen, Yongfen; Jana, Nikhil; and Narayanaswamy, Arun, "Synthetic control of metal oxide nanocrystal sizes and shapes" (2009). Patents Granted. 91.