Luminescence properties of individual empty and water-filled single-walled carbon nanotubes

Sofie Cambré, Silvia M. Santos, Wim Wenseleers, Ahmad R.T. Nugraha, Riichiro Saito, Laurent Cognet, Brahim Lounis

研究成果: Article査読

59 被引用数 (Scopus)

抄録

The influence of water filling on the photoluminescence (PL) properties of SWCNTs is studied by ensemble and single-molecule PL spectroscopy. Red-shifted PL and PL excitation spectra are observed upon water filling for 16 chiralities and can be used to unambiguously distinguish empty SWCNTs from filled ones. The effect of water filling on the optical transitions is well-reproduced by a continuum dielectric constant model previously developed to describe the influence of the nanotube outer environment. Empty nanotubes display narrower luminescence lines and lower inhomogeneous broadening, signatures of reduced extrinsic perturbations. The radial breathing mode phonon sideband is clearly observed in the PL spectrum of small diameter empty tubes, and a strong exciton-phonon coupling is measured for this vibration. Biexponential PL decays are observed for empty and water-filled tubes, and only the short-living component is influenced by the water filling. This may be attributed to a shortening of the radiative lifetime of the bright state by the inner dielectric environment.

本文言語English
ページ(範囲)2649-2655
ページ数7
ジャーナルACS Nano
6
3
DOI
出版ステータスPublished - 2012 3 27

ASJC Scopus subject areas

  • 材料科学(全般)
  • 工学(全般)
  • 物理学および天文学(全般)

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