摘要 |
<p>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 Fe<SUB>3</SUB>O<SUB>4</SUB>, Cr<SUB>2</SUB>O<SUB>3</SUB>, MnO, Co<SUB>3</SUB>O<SUB>4</SUB>, NiO, ZnO, SnO<SUB>2</SUB>, and In<SUB>2</SUB>O<SUB>3</SUB>, 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.</p> |