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@ARTICLE{Kleimann:201043,
author = {Kleimann, Christoph and Stadtmüller, Benjamin and
Schröder, Sonja and Kumpf, Christian},
title = {{E}lectrostatic {I}nteraction and {C}ommensurate {R}egistry
at the {H}eteromolecular {F} $_{16}$ {C}u{P}c–{C}u{P}c
{I}nterface},
journal = {The journal of physical chemistry / C},
volume = {118},
number = {3},
issn = {1932-7455},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2015-03353},
pages = {1652 - 1660},
year = {2014},
abstract = {Tailoring the properties of molecular thin films and
interfaces will have decisive influence on the success of
future organic electronic devices. This is equally true for
metal–organic and hetero–organic contacts as they occur,
for example, in donor–acceptor systems. Here, we report on
the structure formation and interaction across such a
heteromolecular interface. It is formed by monolayers of
F16CuPc and CuPc stacked on a Ag(111) surface. We
investigated the lateral and vertical structure using
spot-profile analysis low energy electron diffraction and
normal incidence X-ray standing waves, and performed pair
potential calculations to understand the driving forces for
the structure formation. Most surprisingly, for one phase we
found a commensurate registry between the two organic
layers, usually a sign for a strong (chemisorptive)
interaction often involving metallic states of the surface.
However, because the organic bilayer is not commensurate
with the underlying Ag substrate in our case, the dominating
factor must be the intermolecular interaction. Pair
potential calculations suggest a site-specific adsorption
that leads to a commensurate registry at the heteromolecular
interface. The adsorbate system was further characterized by
measuring adsorption heights, indicating flat-lying
molecules and a CuPc–F16CuPc layer spacing of 3.06 Å.},
cin = {PGI-3 / JARA-FIT},
ddc = {540},
cid = {I:(DE-Juel1)PGI-3-20110106 / $I:(DE-82)080009_20140620$},
pnm = {422 - Spin-based and quantum information (POF2-422)},
pid = {G:(DE-HGF)POF2-422},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000330252600028},
doi = {10.1021/jp411289j},
url = {https://juser.fz-juelich.de/record/201043},
}