Energetics of single-wall carbon nanotubes as revealed by calorimetry and neutron scattering

Andrey A. Levchenko, Alexander I. Kolesnikov, Olga Trofymluk, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Bundles of (10,10) single-wall carbon nanotubes (SWCNTs) have been studied by high-temperature oxidation calorimetry and inelastic neutron scattering to obtain standard formation enthalpies and entropies at 298 K. SWCNTs are found to be only moderately less stable than graphite, and are significantly more stable than their fullerene counterparts. They are 7 kJ mol-1 metastable in terms of enthalpy relative to graphite, and just 5 kJ mol-1 less stable than diamond. Despite striking differences in vibrational dynamics of carbon atoms in SWCNTs and graphite, their thermodynamic properties at room and higher temperatures are dominated by the same set of high energy vibrations, reflected in very similar vibrational entropies. However, the energetics of SWCNTs are governed by the diameter-dependent enthalpic contributions, but not the specifics of phonon density of states.

Original languageEnglish (US)
Pages (from-to)949-954
Number of pages6
JournalCarbon
Volume49
Issue number3
DOIs
StatePublished - Mar 2011
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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