Screening of excitons in single, suspended carbon nanotubes

Andrew G. Walsh, A. Nickolas Vamivakas, Yan Yin, Stephen B. Cronin, M. Selim Ünlü, Bennett B. Goldberg, Anna K. Swan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

76 Scopus citations


Resonant Raman spectroscopy of single carbon nanotubes suspended across trenches displays red-shifts of up to 30 meV of the electronic transition energies as a function of the surrounding dielectric environment. We develop a simple scaling relationship between the exciton binding energy and the external dielectric function and thus quantify the effect of screening. Our results imply that the underlying particle interaction energies change by hundreds of meV.

Original languageEnglish (US)
Pages (from-to)1485-1488
Number of pages4
JournalNano letters
Issue number6
StatePublished - Jun 2007

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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