Relation between peak structures of loss functions of single double-walled carbon nanotubes and interband transition energies

Yohei Sato, Masami Terauchi, Yahachi Saito, Kentaro Sato, Riichiro Saito

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Electron energy-loss spectra of single double-walled carbon nanotubes (DWCNTs) were compared with calculated joint density of states (jDOSs) obtained by a simple tight-binding (STB) and an extended tight-binding (ETB) method. From the comparisons, interband transition energies of ETB calculations show better agreement with peak positions of the experimental spectra than those of STB results. From a further comparison among calculated jDOS, real and imaginary parts of a dielectric function and a loss function Im[-1/ε], it was confirmed that the peak energies in a spectrum of single DWCNTs are almost equal to those of the optical absorption spectrum ε2.

Original languageEnglish
Pages (from-to)129-132
Number of pages4
JournalJournal of Electron Microscopy
Volume57
Issue number4
DOIs
Publication statusPublished - 2008 Aug 1

Keywords

  • Carbon nanotubes
  • Electron energy-loss spectroscopy
  • Extended tight-binding calculation

ASJC Scopus subject areas

  • Instrumentation

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