Charge Transfer Evidence between Carbon Nanotubes and Encapsulated Conjugated Oligomers

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. Infrare...

Full description

Saved in:
Bibliographic Details
Published inJournal of physical chemistry. C Vol. 115; no. 24; pp. 11898 - 11905
Main Authors Alvarez, L, Almadori, Y, Arenal, R, Babaa, R, Michel, T, Le Parc, R, Bantignies, J-L, Jousselme, B, Palacin, S, Hermet, P, Sauvajol, J.-L
Format Journal Article
LanguageEnglish
Published American Chemical Society 23.06.2011
Subjects
C: Nanops and Nanostructures
Chemical Sciences
Material chemistry
FUNCTIONALIZATION
SERIES
END-CAPPED OLIGOTHIOPHENES
SPECTRA
RAMAN-SPECTROSCOPY
RENORMALIZATION
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp1121678