Pump-probe spectroscopy of exciton dynamics in (6,5) carbon nanotubes

Zipeng Zhu, Jared Crochet, Michael S. Arnold, Mark C. Hersam, Hendrik Ulbricht, Daniel Resasco, Tobias Hertel

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92 Citations (Scopus)

Abstract

We investigate exciton dynamics in isopycnically enriched (6,5) nanotube-DNA suspensions using femtosecond time-resolved pump-probe spectroscopy. The ground state recovery is characterized by a t -0.45 ± 0.03 power law behavior, indicative of a one-dimensional diffusion-limited reaction that is tentatively attributed to subdiffusive trapping of dark excitons. Spectral transients of bright 0A0- singlet excitons within the E11 and E22 manifolds exhibit a photobleach (PB) and a photoabsorption (PA) signal of similar strength. The PA is blue-shifted with respect to the PB-signal by 7.5 meV and is attributed to a transition from the dark singlet exciton 0A0+ to a 0A 0- + 0A0+ state within the two exciton E11 manifold.

Original languageEnglish
Pages (from-to)3831-3835
Number of pages5
JournalJournal of Physical Chemistry C
Volume111
Issue number10
DOIs
Publication statusPublished - Mar 15 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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    Zhu, Z., Crochet, J., Arnold, M. S., Hersam, M. C., Ulbricht, H., Resasco, D., & Hertel, T. (2007). Pump-probe spectroscopy of exciton dynamics in (6,5) carbon nanotubes. Journal of Physical Chemistry C, 111(10), 3831-3835. https://doi.org/10.1021/jp0669411