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

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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.

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Authors and Affiliations

  1. Department of Physics, Konan University, 658-8501, Kobe, Japan

    Masao Ichida & Hiroaki Ando

  2. National Institute for Information and Communications Technology, 651-2492, Kobe, Japan

    Shingo Saito

  3. Department of Chemistry, Faculty of Science, Nagoya University, 464-8601, Nagoya, Japan

    Yasumitsu Miyata

  4. Department of Physics, Faculty of Science, Tokyo Metropolitan University, 192-0364, Tokyo, Japan

    Kazuhiro Yanagi

  5. Nanotechnology Research Institute, Advanced Industrial Science and Technology, 305-8562, Tsukuba, Japan

    Hiromichi Kataura

Authors
  1. Masao Ichida
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  2. Shingo Saito
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  3. Yasumitsu Miyata
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  4. Kazuhiro Yanagi
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  5. Hiromichi Kataura
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  6. Hiroaki Ando
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Corresponding author

Correspondence to Masao Ichida.

Additional information

Contribution to the Topical Issue “Excitonic Processes in Condensed Matter, Nanostructured and Molecular Materials”, edited by Maria Antonietta Loi, Jasper Knoester and Paul H. M. van Loosdrecht.

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Ichida, M., Saito, S., Miyata, Y. et al. Intra- and inter-tube exciton relaxation dynamics in high purity semiconducting and metallic single-walled carbon nanotubes. Eur. Phys. J. B 86, 45 (2013). https://doi.org/10.1140/epjb/e2012-30610-4

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  • DOI: https://doi.org/10.1140/epjb/e2012-30610-4

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