Morphologically Templated Growth of Aligned Spinel CoFe2O4 Nanorods


  • This work was supported by the Office of Basic Energy Sciences, US Department of Energy. The Oak Ridge National Laboratory is managed by UT-Battelle, LLC for the US Department of Energy under Contract DE-AC05-00OR22725. This research was supported in part by an appointment for Z.T.Z. to the ORNL Research Associates Program, administered jointly by ORNL and the Oak Ridge Institute for Science and Education.


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Uniaxially aligned CoFe2O4 nanorods (see Figure) are obtained by coprecipitation of Co2+, Fe2+, and C2O42– ions in a microemulsion solution, and subsequent high-temperature decomposition of CoFe2(C2O4)3. Each nanorod is made up of a “tectonic” assembly of CoFe2O4 nanocrystals. Magnetization of such CoFe2O4 materials may lead to their use in high-density magnetic recording media and high-performance electromagnetic and spintronic devices.