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@PHDTHESIS{Li:58756,
author = {Li, Zhihai},
title = {{S}elf-assembly and {L}ocal {F}unctionality at
{A}u/{E}lectrolyte {I}nterfaces: {A}n in-situ {S}canning
{T}unneling {M}icroscopy {A}pproach},
volume = {16},
school = {RWTH Aachen},
type = {Dr. (Univ.)},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {PreJuSER-58756},
isbn = {978-3-89336-482-4},
series = {Schriften des Forschungszentrums Jülich. Reihe
Informationstechnik / Information Technology},
pages = {VIII, 135 S.},
year = {2007},
note = {Record converted from VDB: 12.11.2012; RWTH Aachen, Diss.,
2007},
abstract = {The integration of molecular structures in electronic
circuits is currently an active field of fundamental
research inspired by the visionary concepts of moleculebased
electronics. The bottom-up approach, based on the
self-assembly of functional molecular building blocks into
more complex architectures, represents an attractive
alternative to silicon-based nanoelectronics. Basic concepts
and strategies of twodimensional self-assembly and electron
transport in tailored nanostructures can be also addressed
and explored at electrified solid/liquid interfaces
employing the electrolyte as an “electrochemical gate”.
In this dissertation, we applied electrochemical
$\underline{S}$canning $\underline{T}$unneling
$\underline{M}$icroscopy and $\underline{S}$pectroscopy (STM
and STS) in combination with $\underline{C}$yclic
$\underline{V}$oltammetry (CV) and $\underline{S}$urface
$\underline{E}$nhanced $\underline{I}$nfrared
$\underline{R}$eflection $\underline{A}$bsorption
$\underline{S}$pectroscopy (SEIRAS) to investigated the
two-dimensional (2D) assembly of aromatic carboxylic acids
triggered by directional hydrogen bond and
substrate–adsorbate coordination, and structure as well as
electron transfer properties of redox-active
thioalkylviologen derivatives at electrified gold/aqueous
electrolyte interfaces. First, the steady state and kinetic
processes of self-assembled adlayers of carboxylic acids
were investigated on Au(111)/electrolyte interfaces. The
target molecules include trimesic acid (TMA), isophthalic
acid (IA), terephthalic acid (TA) and benzoic acid (BA).
Five distinctly different 2D self-assembled nanostructures
of TMA were created by tuning the applied electrode
potential. The properties of these adlayers have been
elucidated at the molecular level by in situ STM. Four
different ordered adlayers of planar-oriented molecules,
which are labeled as honeycomb structures, a ribbon-type
phase, a herringbone-type phase and hydrogen-bonded dimers
were found in the potential range -0.250 V ≤ E ≤ 0.400
V, i.e. at an uncharged or slightly negatively charged
Au(111) electrode. The structure transitions are in all
cases triggered by increasing the electrode potential.
Further increase of the electrode potential to positive
charge densities, i.e. E > 0.400 V, causes an orientation
change from planar to upright. An initially disordered
[...]},
cin = {IBN-3 / CNI / JARA-FIT},
ddc = {620},
cid = {I:(DE-Juel1)VDB801 / I:(DE-Juel1)VDB381 /
$I:(DE-82)080009_20140620$},
pnm = {Grundlagen für zukünftige Informationstechnologien},
pid = {G:(DE-Juel1)FUEK412},
typ = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
url = {https://juser.fz-juelich.de/record/58756},
}