Diminished Band-Gap Transitions of Single-Walled Carbon Nanotubes in Complexation with Aromatic Molecules
Journal of the American Chemical Society2004Vol. 126(33), pp. 10234–10235
Citations Over TimeTop 10% of 2004 papers
K. A. Shiral Fernando, Yi Lin, Wei Wang, Satish Kumar, Bing Zhou, Su‐Yuan Xie, LaShonda T. Cureton, Ya‐Ping Sun
Abstract
The near-IR absorption spectrum of semiconducting single-walled carbon nanotubes is characterized by the transitions associated with the first (S11) and second (S22) pairs of van Hove singularities in the electronic density of states. We report that a significant effect on the transitions can be caused by non-covalent complexation of the nanotube with planar aromatic molecules such as pyrenes in solution, resulting in the absence of S11 and S22 bands in the near-IR absorption spectrum. Since the complexation is reversible, the characteristic absorption bands can be turned on and off with the complexation in a reversible fashion.
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