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@ARTICLE{Braatz:280923,
author = {Braatz, C. R. and Esat, T. and Wagner, C. and Temirov, R.
and Tautz, Frank Stefan and Jakob, P.},
title = {{S}witching orientation of adsorbed molecules: {R}everse
domino on a metal surface},
journal = {Surface science},
volume = {643},
issn = {0039-6028},
address = {Amsterdam},
publisher = {Elsevier},
reportid = {FZJ-2016-00634},
pages = {98 - 107},
year = {2016},
abstract = {A thus far unknown phase of
1,4,5,8-naphthalene-tetracarboxylic dianhydride (NTCDA) on
Ag(111), characterized by an all perpendicular orientation
of the planar molecules and bound to the Ag substrate
through the carboxyl oxygen atoms has been identified using
infrared absorption spectroscopy and scanning tunneling
microscopy. Its formation process requires second layer
NTCDA to squeeze into empty spaces between relaxed monolayer
NTCDA molecules. Remarkably, this process causes initially
parallel oriented NTCDA to likewise adopt the new, highly
inclined adsorption geometry. According to our SPA-LEED and
STM findings, the new phase displays a distinct long range
order and shows a pronounced tendency to form 1D rows or
narrow islands. We suggest that extra NTCDA preferentially
transforms into the upright configuration close to existing
islands and attaches to them, i.e. the transformation
process proceeds in a directed and recurrent manner (reverse
domino scenario). Identical processing starting with a
compressed NTCDA/Ag(111) monolayer leads to a purely
parallel oriented bilayer, that is, the NTCDA monolayer
phase is retained and merely acts as a passive template for
bilayer NTCDA. The new vertical NTCDA phase represents an
unusual molecular system with π–orbitals oriented
parallel to a metal surface. A substantially reduced
coupling of these orbitals to Ag(111) electronic levels is
conjectured, which will have a major impact on
intermolecular couplings and electronically excited state
lifetimes.},
cin = {PGI-3},
ddc = {540},
cid = {I:(DE-Juel1)PGI-3-20110106},
pnm = {141 - Controlling Electron Charge-Based Phenomena
(POF3-141)},
pid = {G:(DE-HGF)POF3-141},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000366790700017},
doi = {10.1016/j.susc.2015.06.016},
url = {https://juser.fz-juelich.de/record/280923},
}