Ideal dipole approximation fails to predict electronic coupling and energy transfer between semiconducting single-wall carbon nanotubes

Cathy Y. Wong, Carles Curutchet, Sergei Tretiak, Gregory D. Scholes

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

The electronic coupling values and approximate energy transfer rates between semiconductor single-wall carbon nanotubes are calculated using two different approximations, the point dipole approximation and the distributed transition monopole approximation, and the results are compared. It is shown that the point dipole approximation fails dramatically at tube separations typically found in nanotube bundles (∼12-16 Å) and that the disagreement persists at large tube separations (>100 Å, over ten nanotube diameters). When used in Förster resonance energy transfer theory, the coupling between two point transition dipoles is found to overestimate energy transfer rates. It is concluded that the point dipole approximation is inappropriate for use with elongated systems such as carbon nanotubes and that methods which can account for the shape of the particle are more suitable.

Original languageEnglish (US)
Article number081104
JournalJournal of Chemical Physics
Volume130
Issue number8
DOIs
StatePublished - 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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