Crystal-encapsulation-induced band-structure change in single-walled carbon nanotubes: Photoluminescence and Raman spectra

Lain-Jong Li*, Tsung Wu Lin, J. Doig, I. B. Mortimer, J. G. Wiltshire, R. A. Taylor, J. Sloan, M. L.H. Green, R. J. Nicholas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

We report studies of the modification of the band structure of single-walled carbon nanotubes through encapsulation of the inorganic material manganese ditelluride (Mn Te2). Using photoluminescence excitation mapping we show that this leads to a global reduction of their first and second band gap energies by a similar percentage (up to 3.8%). We interpret this as due to the additional screening which causes a change in the internal dielectric constant and a possible lowering of the carbon-carbon transfer integrals. The shifts increase with increasing tube diameter due to the increased quantity of filled materials.

Original languageEnglish (US)
Article number245418
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number24
DOIs
StatePublished - Dec 20 2006

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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