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@ARTICLE{Li:46889,
author = {Li, Z. and Han, B. and Wan, L. J. and Wandlowski, Th.},
title = {{S}upramolecular {N}anostructures of
1,3,5-{B}enzene-tricarboxylic {A}cid at {E}lectrified
{A}u(111)/0.05 {M} {H}2{SO}4 {I}nterfaces - {A}n in-situ
{S}canning {T}unneling {M}icroscopy {S}tudy},
journal = {Langmuir},
volume = {21},
issn = {0743-7463},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {PreJuSER-46889},
pages = {6915 - 6928},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {The potential-induced adsorption and self-assembly of
1,3,5-benzene-tricarboxylic acid (TMA) was investigated at
the electrified Au(111)/0.05 M H2SO4 interface by in-situ
scanning tunneling microscopy (STM) and surface enhanced
infrared reflection absorption spectroscopy (SEIRAS) in
combination with electrochemical techniques. Depending on
the applied electric field, TMA forms five distinctly
different, highly ordered supramolecular adlayers on Au(111)
surfaces. We have elucidated their real-space structures at
the molecular scale. In the potential range -0.25 V < E <
0.20 V, planar-oriented TMA molecules form a hexagonal
open-ring honeycomb structure, Ia, a hydrogen-bonded
ribbon-type phase, Ib, and a herringbone-type phase, Ic,
stabilized by directional hydrogen bonding and weak
substrate-adsorbate interactions. Interfacial water
molecules are being replaced. In 0.20 V < or = E < 0.40 V,
e.g., around the potential of zero charge, and at slightly
higher coverages, a close-packed physisorbed adlayer of
hydrogen-bonded TMA dimers, II, was observed. Further
increase of the electrode potential to positive charge
densities causes an orientation change from planar to
upright. An initially disordered phase, IIIa, transforms
into an ordered, stripelike chemisorbed adlayer, IIIb, of
perpendicularly oriented TMA molecules. One carboxylate
group per molecule is bound to the electrode surface, while
the two other protonated carboxyl groups are directed toward
the electrolyte and act as structure-determining components
of a hydrogen-bonded two-dimensional ladder-type network.
Structural transitions between the various types of ordered
molecular adlayers are attributed to (hole) nucleation and
growth processes.},
keywords = {J (WoSType)},
cin = {ISG-3 / CNI},
ddc = {670},
cid = {I:(DE-Juel1)VDB43 / I:(DE-Juel1)VDB381},
pnm = {Materialien, Prozesse und Bauelemente für die Mikro- und
Nanoelektronik},
pid = {G:(DE-Juel1)FUEK252},
shelfmark = {Chemistry, Multidisciplinary / Chemistry, Physical /
Materials Science, Multidisciplinary},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:16008404},
UT = {WOS:000230507400037},
doi = {10.1021/la0507737},
url = {https://juser.fz-juelich.de/record/46889},
}