Intermolecular bond stability of C60 dimers and 2D pressure-polymerized C60

Details Intermolecular bond stability of C60 dimers and 2D pressure-polymerized C60 Intermolecular bond stability of C60 dimers and 2D pressure-polymerized C60

1998-04-22

arxiv.org/abs/cond-mat/9804240v1

Physics

Condensed Matter

to be published in: proceedings of Winterschool in Kirchberg on Molecular Nanostructures

Scientific paper

10.1063/1.56455

The thermal stability of C60 dimers and 2D pressure-polymerized C60 is studied using high-resolution capacitance dilatometry. The transformation of both the dimer and the polymer phases back to 'normal' C60 is excellently described by a simple thermally activated process, with activation energies of 1.75 1 0.1 eV (dimer) and 1.9 1 0.2 eV (polymer). These results are compared to previous data of 1D-polymerized C60 and photo-polymerized C60. The thermal expansivity of the 2D-polymer phase is as much as a factor of ten smaller than that of pure C60 and approaches values for diamond.

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