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Media type:
E-Article
Title:
Repulsion between molecules on a metal: Monolayers and submonolayers of hexa-peri-hexabenzocoronene on Au(111)
Contributor:
Wagner, C.
[Author];
Kasemann, D.
[Author];
Golnik, C.
[Author];
Forker, R.
[Author];
Esselinger, M.
[Author];
Müllen, K.
[Author];
Fritz, T.
[Author]
imprint:
APS, 2010
Published in:Physical review / B 81(3), 035423 (2010). doi:10.1103/PhysRevB.81.035423
Language:
English
DOI:
https://doi.org/10.1103/PhysRevB.81.035423
ISSN:
1098-0121
Keywords:
Origination:
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
We investigate the growth of hexa-peri-hexabenzocoronene (HBC) on Au(111) for monolayer (ML) and sub-ML coverage by scanning tunneling microscopy and low-energy electron diffraction. A transition from a disordered isotropic phase at low coverage to a highly ordered phase with a coverage-dependent lattice constant at higher coverage is found and attributed to a repulsive intermolecular force. To deduce the origin of this repulsion a model is set up, containing the Coulomb interaction between molecules and between localized dipoles from the push-back effect, as well as the intermolecular van der Waals potential. The modeling of the van der Waals interaction is done on a force field level. We find that the observed repulsion can only be explained when assuming a certain screening of the attractive London forces by the presence of the metal substrate.