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C60 one- and two-di...
C60 one- and two-dimensional polymers, dimers, and hard fullerite: Thermal expansion, anharmonicity, and kinetics of depolymerization
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Nagel, Peter (author)
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Pasler, Volker (author)
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Lebedkin, Sergei (author)
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Soldatov, Alexander (author)
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Meingast, Christoph (author)
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- Sundqvist, Bertil (author)
- Umeå universitet,Institutionen för fysik
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- Persson, Per-Axel (author)
- Umeå universitet,Institutionen för fysik
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Tanaka, T. (author)
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Komatsu, K. (author)
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Buga, Sergei (author)
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Inaba, Akira (author)
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(creator_code:org_t)
- American Physical Society, 1999
- 1999
- English.
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In: Physical Review B. Condensed Matter and Materials Physics. - : American Physical Society. - 1098-0121 .- 1550-235X. ; 60:24, s. 16920-16927
- Related links:
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http://link.aps.org/...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
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- We report on high-resolution thermal expansion measurements of high-temperature-pressure treated C60 [one-dimensional (1D) and (2D) polymers and “hard fullerite”], as well as of C60 dimers and single crystal monomer C60 between 10 and 500 K. Polymerization drastically reduces the thermal expansivity from the values of monomeric C60 due to the stronger and less anharmonic covalent bonds between molecules. The expansivity of the “hard” material approaches that of diamond. The large and irreversible volume change upon depolymerization between 400 and 500 K makes it possible to study the kinetics of depolymerization, which is described excellently by a simple activated process, with activation energies of 1.9±0.1 eV (1D and 2D polymers) and 1.75±0.05 eV (dimer). Although the activation energies are very similar for the different polymers, the depolymerization rates differ by up to four orders of magnitude at a given temperature, being fastest for the dimers. Preliminary kinetic data of C70 polymers are presented as well.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Fullerenes
- C60
- C70
- fullerene polymers
- high pressure synthesis
- thermal depolymerization
- thermal expansion
- activation energy
- dimers
- linear polymer chains
- two-dimensional polymers
- hard fullerite
- orthorhombic polymer
- tetragonal polymer
- diamond
- Condensed matter physics
- Kondenserade materiens fysik
- fysik
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Nagel, Peter
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Pasler, Volker
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Lebedkin, Sergei
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Soldatov, Alexan ...
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Meingast, Christ ...
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Sundqvist, Berti ...
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show more...
-
Persson, Per-Axe ...
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Tanaka, T.
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Komatsu, K.
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Buga, Sergei
-
Inaba, Akira
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
- Articles in the publication
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Physical Review ...
- By the university
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Umeå University
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Luleå University of Technology