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Vibrational and thermal properties of pressure polymerized C60
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
1998 (English)In: Fullerenes: Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials, vol. 6: Proceedings of the 193rd Meeting of the Electrochemical Society, Symposium Fullerenes: Chemistry, Physics, and New Directions XI, San Diego 1998, Pennington, NJ: The Electrochemical Society , 1998, 769-779 p.Conference paper, Published paper (Refereed)
Abstract [en]

The kinetics of C60 polymerization were studied in the temperature range 450-500 K at pressures below 1 GPa by measurements of the time dependence of the thermal conductivity. The vibrational spectrum of polymerized C60 was studied by inelastic neutron scattering. We find drastic changes in the spectrum compared with the vibrational spectrum of pristine C60: hardening of intermolecular modes, appearance ofa new broad vibrational band at low energies, splitting and significant changes in the peak positions of intramolecular modes. The thermal conductivity, lambda, of polymerized C60 was measured in the temperature range 150-320 K and was found to increase with rising temperature, that reflects strong phonon scattering. The presence of polymeric chains of different length and a high degree of structural disorder in the crystalline lattice of the polymeric phase are the most probable factors responsible for the glass-lika behaviour of lambda(T).

Place, publisher, year, edition, pages
Pennington, NJ: The Electrochemical Society , 1998. 769-779 p.
Series
Electrochemical Society Proceedings, 98-8
Keyword [en]
Fullerenes, C60, fullerene polymers, high pressure synthesis, high pressure, thermal conductivity, inelastic neutron scattering, glass-like properties
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-23413ISBN: 1-56677-202-8 (print)OAI: oai:DiVA.org:umu-23413DiVA: diva2:223792
Note
Editors: Karl M. Kadish and Rodney S. Ruoff.Available from: 2009-06-15 Created: 2009-06-15 Last updated: 2010-01-26

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CiteExportLink to record
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