Structural properties of carbon peapods under extreme conditions studied using in situ x-ray diffraction
- Laboratoire des Colloiedes, Verres et Nanomateriaux (UMR CNRS 5587), Universite Montpellier II, 34095 Montpellier Cedex 5 (France)
Structural properties of carbon peapods, C{sub 60}, trapped into single-walled carbon nanotubes (SWNT), have been studied under high-pressure/high-temperature conditions (HPHT) by in situ x-ray diffraction. The C{sub 60} chain structure together with the influence of the filling on the SWNT change under HPHT treatment is investigated. Synthesis of a one-dimensional polymer chain of C{sub 60} inside the single-walled carbon nanotubes is evidenced. At 4 GPa, increasing the temperature up to 1023 deg. C leads to a progressive C{sub 60} polymerization that is associated to a shortening of C{sub 60}-C{sub 60} distance down to 8.7 A. Back to ambient conditions, the C{sub 60} chain remains polymerized, emphasizing the high stability of this material. In addition, our data strongly suggest a symmetry change of the two-dimensional bunde lattice under pressure.
- OSTI ID:
- 20853895
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 74, Issue 20; Other Information: DOI: 10.1103/PhysRevB.74.205425; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DISTANCE
FULLERENES
NANOTUBES
ONE-DIMENSIONAL CALCULATIONS
PHASE STABILITY
POLYMERIZATION
POLYMERS
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
SYMMETRY
SYNTHESIS
TEMPERATURE DEPENDENCE
TRAPPING
TWO-DIMENSIONAL CALCULATIONS
X-RAY DIFFRACTION