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Charge Transfer Evidence between Carbon Nanotubes and Encapsulated Conjugated Oligomers

Alvarez, Laurent and Almadouri, Yan and Arenal, Raoul and Babaa, Moualy Rachid and Michel, Theiry and Le Park, Rozen and Bantignies, Jean-Louis and Jousselme, Bruno and Hermet, P and Palacin, Serge and Sauvajol, Jean-Louis (2011) Charge Transfer Evidence between Carbon Nanotubes and Encapsulated Conjugated Oligomers. Journal of Physical Chemistry C, 115 . pp. 11898-11905. ISSN Print Edition ISSN: 1932-7447, Web Edition ISSN: 1932-7455. 2010 Impact Factor: 4.520

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Official URL: http://pubs.acs.org/journal/jpccck

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.

Item Type:Article
Subjects:Q Science > QD Chemistry
Q Science > QC Physics
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:5786
Deposited By: Dr Moulay Rachid Babaa
Deposited On:02 Aug 2011 04:03
Last Modified:02 Aug 2011 04:03

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