Synthesis, structure, and superconducting properties of NbC nanorods and nanoparticles

Akihiko Fukunaga, Shaoyan Chu, Michael E. McHenry, Michihiko Nagumo

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5 Citations (Scopus)

Abstract

NbC nanorods and nanoparticles have been synthesized using a vapor-solid reaction path starting with carbon nanotube precursors. Their structures are studied using XRD, TEM, and HRSEM. Their superconducting properties of nanoparticles were also characterized using a SQUID magnetometer. For reactions at lower temperatures, NbC nanorods (10 - 20 nm) which replicate the precursor carbon nanotubes are observed. For reactions at higher temperature, coarsened NbC nanoparticles (100 - 500 nm) are observed which have spherical or faceted morphologies. A morphological Rayleigh instability can be applied as initiating the transition from NbC nanorod to nanoparticle morphologies. NbC nanoparticles with a little larger lattice parameter show a higher Tc than stoichiometric bulk NbC.

Original languageEnglish
Pages (from-to)118-122
Number of pages5
JournalMaterials Transactions, JIM
Volume40
Issue number2
DOIs
Publication statusPublished - 1999 Jan 1

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ASJC Scopus subject areas

  • Engineering(all)

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