Charge Transfer Evidence between Carbon Nanotubes and Encapsulated Conjugated Oligomers

Laurent Alvarez; Yann Almadori; Raul Arenal; Moulay-Rachid Babaa; Thierry Michel; Rozenn Le Parc; Jean-Louis Bantignies; Bruno Jousselme; Serge Palacin; Patrick Hermet; Jean-Louis Sauvajol

Charge Transfer Evidence between Carbon Nanotubes and Encapsulated Conjugated Oligomers

Laurent Alvarez ^{1, *} Yann Almadori ¹ Raul Arenal ² Moulay-Rachid Babaa ^{3, 4} Thierry Michel ¹ Rozenn Le Parc ¹ Jean-Louis Bantignies ¹ Bruno Jousselme ³ Serge Palacin ³ Patrick Hermet ¹ Jean-Louis Sauvajol ¹

* Corresponding author

1 L2C - Laboratoire Charles Coulomb

2 LEM - ONERA - CNRS - Laboratoire d'étude des microstructures [Châtillon]

3 LCSI - Laboratoire de Chimie des Surfaces et Interfaces

4 Chemical Engineering Department

Abstract : A hybrid system consisting of quaterthiophene derivative inserted into carbon nanotubes is studied. Encapsulation efficiency of the conjugated oligomers in the hollow core of nanotubes is investigated by transmission electron microscopy and spatial-resolved electron energy loss spectroscopy. Infrared spectroscopy showed evidence of a significant positive charge transfer on the inserted oligothiophene. Raman spectra display different behaviors depending on the excitation energy and correlated to the quaterthiophene optical absorption energy. At high excitation wavelength (far from the oligomer resonance), radial breathing modes exhibit a significant upshift consistent with an encapsulation effect. At low excitation wavelength (close to the oligomer resonance), both the G-band shift and the low-frequency modes vanishing suggest a significant charge transfer between the quaterthiophene and the nanotubes

Keywords : END-CAPPED OLIGOTHIOPHENES, RAMAN-SPECTROSCOPY, FUNCTIONALIZATION, RENORMALIZATION, SPECTRA, SERIES

Document type :

Journal articles

Domain :

Chemical Sciences / Material chemistry

Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/cea-00960683
Contributor : Serge Palacin <>
Submitted on : Tuesday, March 18, 2014 - 3:26:46 PM
Last modification on : Wednesday, May 29, 2019 - 9:46:13 AM

Charge Transfer Evidence between Carbon Nanotubes and Encapsulated Conjugated Oligomers

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Charge Transfer Evidence between Carbon Nanotubes and Encapsulated Conjugated Oligomers

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