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Issue 39, 2009
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Cobalt nanofibers encapsulated in a graphite shell by an electrospinning process

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Abstract

As cobalt is an important ferromagnetic material and the nanofibrous shape greatly improves the magnetic properties, we are introducing cobalt nanofibers encapsulated in graphite shell to gain the advantages of the nanofibrous shape as well as to produce protected materials. An electrospun nanofiber mat consisting of cobalt acetate and poly(vinyl alcohol) has been calcined in argon atmosphere at 850 °C. Calcination of cobalt acetate in an inert atmosphere leads to the production of pure cobalt which strongly enhanced graphitization of the utilized polymer to form a graphite shell. Physicochemical characterization analyses indicated that the final product was pure cobalt nanofibers enveloped in a 10 nm thick graphite shell. The graphite shell did not affect the magnetic properties of the synthesized graphite-encapsulated cobalt nanofibers compared with the bare ones which reveal preeminent magnetic characteristics; moreover the shell modifies some of these properties to be temperature independent.

Graphical abstract: Cobalt nanofibers encapsulated in a graphite shell by an electrospinning process

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Publication details

The article was received on 06 Mar 2009, accepted on 27 Jul 2009 and first published on 20 Aug 2009


Article type: Paper
DOI: 10.1039/B904669K
Citation: J. Mater. Chem., 2009,19, 7371-7378
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    Cobalt nanofibers encapsulated in a graphite shell by an electrospinning process

    N. A. M. Barakat, B. Kim, S. J. Park, Y. Jo, M. Jung and H. Y. Kim, J. Mater. Chem., 2009, 19, 7371
    DOI: 10.1039/B904669K

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