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Ligand effect on the growth and the digestion of Co nanocrystals
Anna C S Samia1, Kylee Hyzer, John A Schlueter
1Chemistry Division, Materials Science Division, and Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Abstract:
The reaction product of cobalt carbonyl decomposition depends on the concentration of the oleic acid ligand. With a low concentration of ligand, nanocrystals nucleate and grow to large ferromagnetic particles through the process of Ostwald ripening and coalescence coarsening. With a high concentration of ligand, stable cluster complexes are formed. Addition or removal of ligand from the reaction products can interchange the formation of cluster complexes and nanocrystals.

