1. Synthesis, Characterization, and Magnetic Properties of Uniform-sized MnO Nanospheres and Nanorods Jongnam Park,† Eunae Kang,† Che Jin Bae,‡ Je-Geun Park,‡ Han-Jin Noh,§ Jae-Young Kim,§ Jae-Hoon Park,§ Hyun Min Park,| and Taeghwan Hyeon*, National CreatiVe Research InitiatiVe Center for Oxide Nanocrystalline Materials and School of Chemical Engineering, Seoul National UniVersity, Seoul , Korea, Department of Physics and Institute of Basic Sciences, Sungkyunkwan UniVersity, Suwon Korea, Department of Physics and Pohang Acceleration Laboratory, Pohang UniVersity of Science and Technology, Pohang, Kyungbuk , Korea, and New Material EValuation Center, Korea Research Institute of Standards and Science, Taejon , Korea ReceiVed: April 22, 2004; In Final Form: July 5, 2004
報告人：許祐元
指導教授：王聖璋
J. Phys. Chem. B 2004, 108,

2. Introduction
MnO2 is currently under extensive investigations for its capacitance properties.
manganese oxide nanostructures for their potential applications such as catalysis, rechargeable batteries, ionsieves and supercapacitors
the synthesis of MnO nanospheres and nanorods from the thermal decomposition of Mn-surfactant complexes

3. Experimental complex Stirring At 300℃ for 1hr Mn2(CO)10 Stirring 0.2 g
Trioctylphosphine(TOP)
10 mL
complex
Oleylamine
2 mL
Triphenylphosphine(TPP)
10 mL
J. Phys. Chem. B 2004, 108,

4. Results and discussion
Inject TPP
Inject TOP
Inject TOP
At 100℃ for 2 days
Figure 1. Transmission electron micrograph of 5-, 10-, and 40-nm
monodisperse MnO nanoparticles.
J. Phys. Chem. B 2004, 108,

5. Figure 2. Low-resolution transmission electron micrographs of
Inject TOP
At 330℃
Inject TPP
At 330℃
Figure 2. Low-resolution transmission electron micrographs of
(a) 7 x 33 nm and (b) 8 x 140 nm sized MnO nanorods,
(c) high-resolution transmissionelectron micrograph, and
(d) electron diffraction pattern of nm sized MnO nanorods.
J. Phys. Chem. B 2004, 108,

6. Figure 4. The powder X-ray diffraction (XRD) pattern of 8 140
MnO (JCPDS, )
MnO (JCPDS, )
M3O4 (JCPDS, )
Figure 4. The powder X-ray diffraction (XRD) pattern of
nm sized MnO nanorods.

7. Conclusion
we synthesized uniform-sized MnO nanospheres with particle sizes ranging from 5 to 40 nm from the thermal decomposition of Mn-surfactant complexes.
When TOP and TPP were employed as the surfactants, MnO nanorods with sizes of 7 nm (diameter) x 33 nm (length) and 8 nm (diameter) x 140 nm (length) were produced

8. Thanks for your attention