Investigation of a metal-organic interface – realization and understanding of a molecular switch
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Beschreibung
The field of molecular organic electronics is an emerging and very dynamic area. The
continued trend to miniaturisation, combined with increasing complexity and cost of
production in conventional semiconductor electronics, forces companies to turn their attention
to alternatives that promise the next levels of scale at significantly lower cost. After consumer
electronic devices based on organic transistors, such as TVs and book readers, have already
been presented, molecular electronics is expected to offer the next breakthrough in feature
size.
Unfortunately, most of the organic/metal interfaces contain intrinsic defects that break the
homogeneity of the interface properties. In this thesis, the electronic and structural properties
of such defects were examined in order to understand the influence of the inhomogeneities on
the quality of the interface layer. However, the main focus of this work was the investigation
of the local properties of a single molecule. Taking advantage of the Scanning Tunnelling
lar switch was realized
and studied. Moreover, in close collaboration with theory groups, the underlying mechanism
driving the switching process was identified and described. Besides the investigation of the
switching process, the ability of the STM to build nanostructures of different shapes from
large organic molecules was shown.
Knowing the parameters for realization and control of the switching process and for building
the molecular corrals, the results of this investigation enable the reconstruction of the studied
molecular ensemble and its deployment in electric molecular circuits, constituting a next step
towards further miniaturization of electronic devices.
Autor*in
Olga Neucheva
Themen in »Investigation of a metal-organic interface – realization and understanding of a molecular switch«
PTCDA MODEL PTCDA/AG(111) Switch