Charge transfer in conjugated oligomers encapsulated into carbon nanotubes

Y. Almadori, L. Alvarez, R. Arenal, R. Babaa, T. Michel, R. Le Parc, J. L. Bantignies, B. Jouselme, S. Palacin, P. Hermet, J. L. Sauvajol

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

This study deals with a hybrid system consisting in quaterthiophene derivative encapsulated inside single-walled and multiwalled carbon nanotubes. Investigations of the encapsulation step are performed by transmission electron microscopy. Raman spectroscopy data point out different behaviors depending on the laser excitation energy with respect to the optical absorption of quaterthiophene. At low excitation energy (far from the oligomer resonance window) there is no significant modification of the Raman spectra before and after encapsulation. By contrast, at high excitation energy (close to the oligomer resonance window), Raman spectra exhibit a G-band shift together with an important RBM intensity loss, suggesting a significant charge transfer between the inserted molecule and the host nanotubes. Those results suggest a photo induced process leading to a significant charge transfer.

Original languageEnglish
Pages (from-to)2560-2563
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume248
Issue number11
DOIs
Publication statusPublished - Nov 2011

Keywords

  • Carbon nanotubes
  • Encapsulation
  • Quaterthiophene
  • Raman

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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