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Published on: March 20, 2012
A TPD-based determination of the graphite interlayer cohesion energy
Jürgen Weippert1, Jakob Hauns1, Julian Bachmann1
1Institute of Physical Chemistry, KIT, Fritz-Haber-Weg 2, D-76131 Karlsruhe, Germany.
Abstract:
Temperature Programmed Desorption (TPD) spectroscopy was used to determine the binding energies of polycyclic aromatic hydrocarbons C H (22 ≤ n ≤ 60) with highly oriented pyrolytic graphite. These energies were then used to estimate the dispersive graphite interlayer cohesion by means of a refined extrapolation method proposed by Björk et al. This yields a cohesion energy of 44.0 ± 3.8 meV per carbon atom. We discuss some limits of the TPD-based approach and contrast our values with previous determinations of the interlayer cohesion energy of graphite.
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