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Nano LettersVolume 5, Issue 11, November 2005, Pages 2310-2313

Nanoscale optical imaging of excitons in single-walled carbon nanotubes(Article)

  • aInstitute of Physical and Theoretical Chemistry, University of Tuebingen, Tuebingen, Germany
  • bInstitute of Optics, University of Rochester, Rochester, NY 14627, United States

Abstract

We present simultaneous near-field photoluminescence (PL) and Raman imaging of single-walled carbon nanotubes (SWNTs) with a spatial resolution better than 15 nm. Highly localized excitation is used to visualize the spatial extent of the contributing excited states. For SWNTs on glass, we typically observe highly confined PL from short segments of about 20 nm in length. The PL from micelle-encapsulated SWNTs on mica is extended along the tube up to several hundreds of nanometers. We find that near-field enhancement is much stronger for photoluminescence than for Raman scattering, an observation that is explained by the low intrinsic quantum yield of SWNTs. © 2005 American Chemical Society.

Indexed keywords

Engineering uncontrolled termsNear-field photoluminescenceOptical imagingQuantum yieldSingle-walled carbon nanotubes
Engineering controlled terms:Electric excitationExcitonsImage enhancementImaging systemsNanotechnologyPhotoluminescenceRaman scattering
Engineering main heading:Carbon nanotubes
  • ISSN: 15306984
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1021/nl051775e
  • Document Type: Article

  Hartschuh, A.; Institute of Physical and Theoretical Chemistry, University of Tuebingen, Germany;
© Copyright 2011 Elsevier B.V., All rights reserved.

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