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Published March 2006 | public
Journal Article

Room Temperature Solvent-Free Synthesis of Monodisperse Magnetite Nanocrystals


We have successfully demonstrated a facile, solvent-free synthesis of highly crystalline and monodisperse Fe_3O_4 nanocrystallites at ambient temperature avoiding any heating. Solid state reaction of inorganic Fe(II) and Fe(III) salts with NaOH was found to produce highly crystalline Fe_3O_4 nanoparticles. The reaction, if carried out in the presence of surfactant such as oleic acid–oleylamine adduct, generated monodisperse Fe_3O_4 nanocrystals extractable directly from the reaction mixture. The extracted nanoparticles were capable of forming self-assembled, two-dimensional and uniform periodic array. The new process utilizes inexpensive and nontoxic starting materials, and does not require a use of high boiling point and toxic solvents, thus is amenable to an environmentally desirable, large-scale synthesis of nanocrystals.

Additional Information

© 2006 American Scientific Publishers. Received: 26 July 2005; Revised/Accepted: 13 November 2005. The authors acknowledge support of the work by Iwama Endowed Fund at UC San Diego (for S.Jin) and Dupont (for J.B.T albot). The HRTEM work was carried out at EMSL of Pacific Northwest National Laboratory.

Additional details

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