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Influence of the pressure-temperature treatment on the polymerization of C60 single crystals at 2 GPa - 700 K
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
2005 (English)In: Carbon, ISSN 0008-6223, Vol. 43, no 4, 709-16 p.Article in journal (Refereed) Published
Abstract [en]

X-ray diffraction and Raman spectroscopy have been used to characterize the structures obtained when C-60 single crystals are treated at 2GPa-700K. Two different experimental procedures have been applied: the temperature is raised before the pressure is applied, or the opposite. The "heating-then-pressing" path leads to the tetragonal polymer structure (P4(2)/mmc) together with a minor fraction of rhombohedral structure, which confirms previous results. In contrast, the "pressing-then-heating" path leads to a different state presenting similarities with both the rhombohedral and the disordered dimer structures. The results are discussed in light of the orientational and dynamical aspects of the C60 polymerization.

Place, publisher, year, edition, pages
2005. Vol. 43, no 4, 709-16 p.
Keyword [en]
C60, fullerenes, high pressure, polymers, orthorhombic, tetragonal, phase transformation, structural transformation, high pressure, high temperature, Raman spectroscopy, X-ray diffraction, XRD, dimers
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:umu:diva-12179DOI: doi:10.1016/j.carbon.2004.10.039OAI: oai:DiVA.org:umu-12179DiVA: diva2:151850
Available from: 2008-02-20 Created: 2008-02-20 Last updated: 2011-01-12Bibliographically approved

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Wågberg, ThomasSundqvist, Bertil

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