Porous nanotubes of Co3O4: Synthesis, characterization, and magnetic properties

Stoichiometric Co3O4 porous nanotubes have been synthesized through a simple modified microemulsion method. The structural and the chemical information of the as-grown nanotubes have been investigated by means of x-ray diffraction, electron microscopy, electron energy loss spectroscopy, and dynamic...

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Bibliographic Details
Published in:Applied physics letters 2004-09, Vol.85 (11), p.2080-2082
Main Authors: Wang, R. M., Liu, C. M., Zhang, H. Z., Chen, C. P., Guo, L., Xu, H. B., Yang, S. H.
Format: Article
Language:English
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Summary:Stoichiometric Co3O4 porous nanotubes have been synthesized through a simple modified microemulsion method. The structural and the chemical information of the as-grown nanotubes have been investigated by means of x-ray diffraction, electron microscopy, electron energy loss spectroscopy, and dynamic force microscopy. The results reveal that the as-grown materials are formed by concentric stacking of Co3O4 (111) planes or weaved porous nanotubes with diameters ranging from tens to ∼200nm and sidewall thickness ranging from 2to∼20nm. Magnetic property of the sample demonstrates a magnetic transition temperature at 8.4K, indicating macroscopic quantum confinement effects from the sidewall thickness of the porous nanotube.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1789577