Structural characterization of cup-stacked-type nanofibers with an entirely hollow core

M. Endo, Y. A. Kim, T. Hayashi, Y. Fukai, K. Oshida, M. Terrones, T. Yanagisawa, S. Higaki, M. S. Dresselhaus

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352 Scopus citations


Straight long carbon nanofibers with a large hollow core obtained by a floating reactant method show a stacking morphology of truncated conical graphene layers, which in turn exhibit a large portion of open edges on the outer surface and also in the inner channels. Through a judicious choice of oxidation conditions, nanofibers with increased active edge sites are obtained without disrupting the fiber's morphology. A graphitization process induces a morphological change from a tubular type to a reversing saw-toothed type and the formation of loops along the inner channel of the nanofibers, accompanied by a decrease in interlayer spacing.

Original languageEnglish (US)
Pages (from-to)1267-1269
Number of pages3
JournalApplied Physics Letters
Issue number7
StatePublished - Feb 18 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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