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Structure and dynamics of carbon buckyballs encapsulated into Single-Walled carbon Nanotubes

Published online by Cambridge University Press:  01 February 2011

Julien Cambedouzou ,
Stéphane Rols ,
Robert Almairac ,
Jean-Louis Sauvajol ,
H. Kataura  and
H. Schober
Julien Cambedouzou
Affiliation:
Groupe de Dynamique des Phases Condensées (UMR CNRS 5581), Université Montpellier II, F-34095, Montpellier Cedex 5, France.
Stéphane Rols
Affiliation:
Groupe de Dynamique des Phases Condensées (UMR CNRS 5581), Université Montpellier II, F-34095, Montpellier Cedex 5, France.
Robert Almairac
Affiliation:
Groupe de Dynamique des Phases Condensées (UMR CNRS 5581), Université Montpellier II, F-34095, Montpellier Cedex 5, France.
Jean-Louis Sauvajol
Affiliation:
Groupe de Dynamique des Phases Condensées (UMR CNRS 5581), Université Montpellier II, F-34095, Montpellier Cedex 5, France.
H. Kataura
Affiliation:
Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology Central 4, Higashi 1–1–1, Tsukuba, Ibaraki 305–8562, Japan.
H. Schober
Affiliation:
Institut Laue Langevin, F-38042 Grenoble, France.
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Abstract

The structural and dynamical properties of C60 chains inserted inside Single Walled carbon Nanotubes (SWNT) have been investigated by x-ray and neutron diffraction, and inelastic neutron scattering (INS). The measurements have been performed on a large mass of a very high quality carbon peapods sample. We showed that powder diffraction could hardly give definitive response on the way the C60s are bonded inside SWNT. However, the comparison of the neutron-derived generalized density of states (GDOS) of the inserted C60 peas with the GDOS of the same objects derived from lattice dynamics calculations led to unambiguous results. The observation of excitations in the 8–15 meV range is a clear evidence for the presence strong bonds between C60s in the sample. In the same time, the observation of a very weak quasi-elastic signal may be related to rotational motions of C60 monomers inside the SWNT. These results suggest that peapods are made of a mixed phase of C60 monomers and C60 n-mers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 858: Symposium HH – Functional Carbon Nanotubes , 2004 , HH8.2
Copyright
Copyright © Materials Research Society 2005

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References

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