Synthesis of Magnetite Nanoparticles of Different Size and Shape by Interplay of Two Different Surfactants
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Given the central role that nanoparticle size and shape play in many fundamental applications for designing functional materials, fine control of the synthesis has been intensively pursued. A simple one-step method for obtaining monodisperse nanoparticles over a large size range with shape control has not yet been reported. Here, we propose a simple method to control the morphology of magnetite nanoparticles by regulating the amount of non-selective binding surfactant by simply altering the ratio of oleylamine and fatty acid. With this approach, we were able to synthesize magnetite nanoparticles with sizes ranging between 6 ± 1 and 176 ± 20 nm and to select between more rounded or faceted shapes.
KeywordsNanoparticle Magnetite Thermal decomposition
The authors thank the financial support from MINECO (Spain, project MAT2010-19236), INCT-FCx, and the Brazilian agencies CNPq, CAPES, FAPESP, and Fundação Araucária. V.M. Lenart also acknowledges fellowship from CAPES (Proc. n° 2263-13-0).
Conflict of Interest
The authors declare that they have no conflict of interest.
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