Vibrations in Benzene and Toluene Monolayers on the Basal Plane of Graphite

  • R. Stockmeyer
  • M. Monkenbusch


The dynamics of an ordered (√7 × √7) layer of C6H6 on microcrystalline graphite (Grafoil, Carbopack) has been studied by neutron spectroscopy. A lattice dynamical calculation on the basis of currently used atom-atom interaction potentials was carried out which explains the experimental data. Similar experi- ments with C6H5 - CH3 in the incommensurate phase showed a strong quasi-elastic scattering intensity which is not present in the commensurate phase but which is also present in the case of a C6H5 - CD3 sample. According to distributions of scattered neutrons which have been computed for a 2-dimensional Debye lattice the quasi-elastic scattering intensity is attributed to acoustic modes in the incommensurate adlayer.


Dispersion Curve Scattered Neutron Lattice Mode Neutron Spectrum Graphite Surface 
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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • R. Stockmeyer
    • 1
  • M. Monkenbusch
    • 1
  1. 1.Institut für FestkörperforschungKernforschungsanlage Jülich GmbHJülichGermany

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