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Intra- and inter-tube exciton relaxation dynamics in high purity semiconducting and metallic single-walled carbon nanotubes

Author

Listed:
  • Masao Ichida
  • Shingo Saito
  • Yasumitsu Miyata
  • Kazuhiro Yanagi
  • Hiromichi Kataura
  • Hiroaki Ando

Abstract

We have measured the exciton and carrier dynamics in the high purity semiconducting (S-) and metallic (M-) single-walled carbon nanotubes (SWNTs) in the isolated and aggregated (bundled) forms. The exciton relaxation decay times are measured by using the pump-probe spectroscopy. For bundled samples, the relaxation time becomes shorter than that for isolated SWNTs sample, because of the existence of inter-tube relaxation. We estimate the relaxation rates from S-SWNT to S-SWNT and S-SWNT to M-SWNT using the decay times for isolated SWNTs, high purity S-SWNTs bundle, and doped S-SWNTs in high purity M-SWNTs bundle. For S-SWNTs, inter-tube relaxation plays an important role in the relaxation dynamics. However, for M-SWNTs, the inter-tube relaxation is not so important, and the transition energy and intensity of exciton in M-SWNTs is strongly affected by the photoexcited carriers which plays like as photo doping. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Suggested Citation

  • Masao Ichida & Shingo Saito & Yasumitsu Miyata & Kazuhiro Yanagi & Hiromichi Kataura & Hiroaki Ando, 2013. "Intra- and inter-tube exciton relaxation dynamics in high purity semiconducting and metallic single-walled carbon nanotubes," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 86(2), pages 1-5, February.
    • Handle: RePEc:spr:eurphb:v:86:y:2013:i:2:p:1-5:10.1140/epjb/e2012-30610-4
    DOI: 10.1140/epjb/e2012-30610-4
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