Synthesis, characterization, and magnetic properties of uniform-sized MnO nanospheres and nanorods

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Park, Jongnam; Kang, Eun Ae; Bae, Che Jin; Park, Je-Geun; Noh, Han-Jin; Kim, Jae-Young; Park, Jae-Hoon; Park, Hyun Min; Hyeon, Taeghwan

Issue Date
American Chemical Society
Journal of Physical Chemistry B, Vol.108 No.36, pp.13594-13598
Uniform-sized MnO nanospheres and nanorods were fabricated by the thermal decomposition of Mn-surfactant complexes. The particle sizes of the nanospheres were varied. from 5 to 40 nm by changing the surfactant. The shape of the particles could be controlled by varying the experimental conditions. The synthesized MnO nanorods have diameters ranging from 7 to 10 nm, and lengths ranging from 30 to 140 nm. Structural characterization using X-ray powder diffraction, X-ray absorption spectroscopy, and high-resolution transmission electron microscopy revealed that the nanoparticles are core/shell structures with a MnO core and a thin Mn3O4 shell. The MnO nanoparticles exhibited very interesting magnetic properties. For example, the MnO nanorods with dimensions of 7 nm x 33 nm showed two blocking temperatures at 35 and 280 K, respectively.
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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