Advanced Materials

A Facile Synthetic Route for the Preparation of Superparamagnetic Iron Oxide Nanorods and Nanorices with Tunable Surface Functionality


  • Financial support of this work from CSIC-I3 (200 660I192) and MEC (MAT2005-03 179 and NANO2004-08 805-C04-01) are gratefully acknowledged. A.F.R. and O.B. acknowledge fellowships from the MEC and the I3P postdoctoral programs. Supporting Information is available online from Wiley InterScience or from the author.


A simple procedure is used to prepare anisometric iron oxide nanoparticlesexhibiting superparamagnetic behavior. The figure shows the nanorod/nanorice morphology of these novel structures. Superparamagnetism is engineered in these structures by favoring thermally activated processes by adopting small particle sizes, introducing defects, and doping with cations. Positively and negatively charged particles are obtained by varying the surface coating.

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