Magnetic Fe catalyst particles in the vapor-phase-grown multi-walled carbon nanotubes

Jae Won Jang, Kyu Won Lee, I. H. Oh, E. M. Lee, I. M. Kim, Cheol Eui Lee, C. J. Lee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Control of the magnetic Fe catalyst particle size encapsulated in multi-walled carbon nanotubes (MWNTs) was obtained by means of the vapor-phase growth employing different reaction gas flow rates. According to our structural and magnetic investigation, the magnetic encapsulation in the MWNTs consists of α-Fe core particles and interfacial Fe3C surrounding them. Characteristic α-Fe particle size dependence of the coercivity was revealed, and the coercivity as well as the anisotropy were shown to be dictated by the interfacial Fe3C.

Original languageEnglish
Pages (from-to)561-564
Number of pages4
JournalSolid State Communications
Issue number11-12
Publication statusPublished - 2008 Mar

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation (User Program of Proton Engineering Frontier Project and M60504000021-05B0400-02110 (Joint Korean-Israeli Research Grant 3-2217)) and by the Korea Research Foundation (Grant No. KRF-2004-005-C00060 and KRF-2007-314-C00129). This work was also supported by the Seoul Research and Business Development Program (Grant No. 10583). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.


  • A. Magnetically ordered materials
  • A. Nanostructures
  • B. Nanofabrications

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry


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