Interactions between conjugated polymers and single-walled carbon nanotubes

David W. Steuerman, Alexander Star, Riccardo Narizzano, Hyeon Choi, Ryan S. Ries, Claudio Nicolini, J. Fraser Stoddart, James R. Heath*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

224 Scopus citations

Abstract

The chemical interactions between single walled carbon nanotubes (SWNTs) and two structurally similar polymers, poly{(m-phenylenevinylene)-co-[(2,5-dioctyloxy-p-phenylene)vinylene]}, or PmPV, and poly{(2,6-pyridinylenevinylene)-co-[(2,5-dioctyloxy-p-phenylene)vinylene]}, or PPyPV, are investigated. The fundamental difference between these two polymers is that PPyPV is a base and is readily protonated via the addition of HCl. Both polymers promote chloroform solubilization of SWNTs. We find that the SWNT/PPyPV interaction lowers the pKa of PPyPV. Optoelectronic devices, fabricated from single polymer-wrapped SWNT structures, reveal a photogating effect on charge transport which can rectify or amplify current flow through the tubes. For PmPV wrapped tubes, the wavelength dependence of this effect correlates to the absorption spectrum of PmPV. For PPyPV, the wavelength dependence correlates with the absorption spectrum of protonated PPyPV, indicating that SWNTs assist in charge stabilization.

Original languageEnglish (US)
Pages (from-to)3124-3130
Number of pages7
JournalJournal of Physical Chemistry B
Volume106
Issue number12
DOIs
StatePublished - Mar 28 2002

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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