Stable BC2N nanostructures: Low-temperature production of segregated C/BN layered materials

Ph Kohler-Redlich, M. Terrones, C. Manteca-Diego, W. K. Hsu, H. Terrones, M. Rühle, H. W. Kroto, D. R.M. Walton

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

Stable filaments of nanometer dimensions with overall chemical stoichiometry close to BC2N were generated by pyrolysis of CH3CN·BCl3 over Co at 1000°C and, for the first time, their structures were investigated, at the nanometer level, using high spatial resolution electron energy-loss spectroscopy. Concentration profiles, along and across the filaments, revealed that B, C and N are not homogeneously distributed within the nanostructures but are separated into pure C and BN domains. Interestingly, pure h-BN layers are always sandwiched between graphite-like shells. A two-stage growth process is proposed involving: (a) initial extrusion of a pure carbon filament from the catalytic particle, followed by (b) subsequent thickening of the BN and C layers precipitated from the gas phase. This pyrolytic technique provides an alternative and efficient route to segregated BN/C nanomaterials, which may prove useful as robust nanocomposites and semiconductor nanodevices with enhanced resistance towards oxidation.

Original languageEnglish (US)
Pages (from-to)459-465
Number of pages7
JournalChemical Physics Letters
Volume310
Issue number5-6
DOIs
StatePublished - Sep 10 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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