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@PHDTHESIS{Kowalzik:14153,
      author       = {Kowalzik, Peter},
      title        = {{S}ubstituted coronenes for molecular electronics: {F}rom
                      supramolecular structures to single molecules},
      volume       = {16},
      school       = {RWTH Aachen},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich},
      reportid     = {PreJuSER-14153},
      isbn         = {978-3-89336-679-8},
      series       = {Schriften des Forschungszentrums Jülich. Reihe Information
                      / Information},
      pages        = {IX, 149 S.},
      year         = {2010},
      note         = {Record converted from JUWEL: 18.07.2013; RWTH Aachen,
                      Diss., 2010},
      abstract     = {The ongoing miniaturization of silicon integrated circuits
                      makes the understanding of the electronic properties of
                      nanoscale structures and the exploration of novel materials
                      and device concepts more and more important. One promising
                      approach to construct future electronic systems is the usage
                      of organic molecules and utilizing their ability to
                      self-assemble and/or taking advantage of the possibility to
                      achieve various electronic functions just by modifying their
                      chemical structures. This thesis explores a highly
                      conjugated molecular system, namely dodecakis(arylthio)-
                      coronenes (DATCs), with a view to potential applications as
                      molecular electronic building blocks. The techniques of
                      scanning tunneling microscopy and spectroscopy are applied
                      to characterize the structural and the electronic properties
                      of monolayers of these molecules on metal surfaces.
                      Variations of the substituents allowed to specifically
                      affect the self-assembly of the molecules. Supramolecular
                      structures with different orientations of the molecules
                      relative to the substrate and with different intermolecular
                      interactions are obtained. The growth of highly ordered
                      supramolecular chains is observed in the case of the basic
                      molecular building block dodecakis(phenylthio)coronene
                      (Cor-H) on Au(111) surfaces. The formation of delocalized
                      electronic states along the chains suggests the potential of
                      this system as a basis for novel organic materials with
                      anisotropic charge transport properties. Substituents with
                      varying electron-accepting or electron-donating ability are
                      used to modify Cor-H and enhance or prevent the molecular
                      stacking. Assemblies of molecules with molecular quantum dot
                      behavior can also be obtained in this way. The tailored
                      functionalization allows a decoupling of the aromatic system
                      of the molecules from the substrate states, which in turn
                      leads to the occurrence of single electron tunneling
                      effects. Different substitutions of the DATC system can thus
                      be used to create desired electronic functions. Furthermore,
                      several fabrication routs for nanoscale electrode structures
                      were worked out to “wire up” single molecules in a
                      device-like configuration and to investigate their
                      electrical properties. In particular, the technique of
                      electron-beam lithography in conjunction with unconventional
                      nanofabrication methods like electromigration were utilized
                      to fabricate nanometer-spaced metal electrodes. Such
                      nanopatterns additionally allowed to characterize the charge
                      transport through embedded single molecules.},
      cin          = {IFF-6 / JARA-FIT},
      ddc          = {500},
      cid          = {I:(DE-Juel1)VDB786 / $I:(DE-82)080009_20140620$},
      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/14153},
}