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@PHDTHESIS{Frielinghaus:150421,
      author       = {Frielinghaus, Robert Detrich},
      title        = {{S}tructural influences on electrical transport in
                      nanostructures},
      volume       = {60},
      school       = {Universität Duisburg},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2014-00480},
      isbn         = {978-3-89336-867-9},
      series       = {Schriften des Forschungszentrums Jülich. Reihe
                      Schlüsseltechnologien / Key Technologies},
      pages        = {VIII, 190 S.},
      year         = {2013},
      note         = {Universität Duisburg, Diss., 2013},
      abstract     = {The interplay between the molecular configuration and the
                      electrical and optical properties of various individual
                      nanostructures is studied in this thesis. These are carbon
                      nanotubes (CNTs), tetramanganese-decorated carbon nanotubes,
                      and InAs nanowires that are investigated on the
                      single-device level with high-resolution transmission
                      electron microscopy and spectroscopy (HR-TEM), Raman
                      scattering, and low-temperature quantum transport
                      measurements. These techniques probe complementary material
                      properties and can jointly provide a comprehensive
                      characterization of the individual nanostructure. This
                      correlation is achieved on a novel sample design developed
                      in the course of this thesis. It combines various
                      lithographic steps on a TEM membrane and is compatible with
                      many (self-assembled) nanostructures. It decouples the
                      device from the substrate, leading to clean transport
                      properties. An individual triple-walled carbon nanotube, as
                      identified using HR-TEM, is investigated with Raman
                      spectroscopy and room-temperature electrical transport. The
                      optical response and the transport channel can be assigned
                      to the individual walls. Quantum transport experiments are
                      performed on two additional carbon nanotube devices,
                      identified with the HR-TEM as a two-fold bundle of
                      single-walled CNTs and a triplewalled CNT, respectively. The
                      stability diagrams exhibit complex features as avoided
                      crossings, Fano-shaped coulomb peaks, and regular saw tooth
                      patterns. Their origin is only found with the detailed
                      knowledge of about the atomic structure. More precisely,
                      these features can be modeled with capacitive and molecular
                      interactions between the various elements of the devices and
                      the environment. Universal conductance fluctuations and the
                      phase-coherence length of four individual InAs nanowire
                      transport devices are likewise studied. Two different
                      temperature dependences can be measured. They are not
                      related to a crystal phase mixing because all four nanowires
                      are statistically identical in these terms as determined by
                      a HR-TEM measurement. The properties of carbon nanotubes can
                      be modified by chemical functionalization. The route
                      proposed in this thesis is the decoration with a
                      tetramanganese molecular antiferromagnet via a carboxylate
                      ligand exchange with the carbon nanotube. The degree of
                      functionalization can be controlled with the oxidation of
                      the CNT. The decoration is monitored with bright- and dark
                      field HR-TEM as well as energy-dispersive X-ray and electron
                      energy loss spectroscopy that show the repartition of the Mn
                      on the carbon nanotubes. Raman spectroscopy and SQUID
                      measurements provide further evidence of a successful
                      decoration and show the integrity of the hybrids. Transport
                      experiments on functionalized carbon nanotube networks
                      demonstrate the integrability of such structures into
                      single-hybrid quantum transport devices. In conclusion, the
                      developed sample layout has a great potential to investigate
                      the impact of specific structural modifications on optical
                      and electrical properties of individual nanostructures. This
                      is an important ingredient for the comparison of theoretical
                      predictions and experimental results.},
      keywords     = {Dissertation (GND)},
      cin          = {PGI-6},
      ddc          = {537.6226},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {422 - Spin-based and quantum information (POF2-422)},
      pid          = {G:(DE-HGF)POF2-422},
      typ          = {PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/150421},
}