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@PHDTHESIS{Kisner:845764,
      author       = {Kisner, Alexandre},
      title        = {{U}ltrathin gold nanowires - {C}hemistry, electrical
                      characterization and application to sense cellular biology},
      volume       = {24},
      school       = {RWTH Aachen},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2018-02973},
      isbn         = {978-3-89336-824-2},
      series       = {Schriften des Forschungszentrums Jülich. Reihe Information
                      / Information},
      pages        = {176 S : Ill., graph. Darst},
      year         = {2012},
      note         = {RWTH Aachen, Diss., 2012},
      abstract     = {The recent advances in the field of nanoscience and
                      nanotechnology have motivated andchallenged the fabrication
                      of nanomaterials that can be assembled into functional
                      networks.Based on this, ultrathin metal nanowires are
                      considered essential building blocks that can be usedto
                      construct nanoelectronic devices for applications in
                      sensors, photonics, and waveguides. Inthis thesis, we have
                      endeavored to produce and understand the synthesis of
                      ultrathin gold (Au)nanowires with diameter of ≈ 2 nm and
                      lengths of up to 8 μm (aspect ratio of about 4,000).
                      Thenanowires could be synthesized employing a simple wet
                      chemical approach using the organicmolecule cis-oleylamine
                      and AuCl as a metal precursor. Cis-oleylamine acted
                      simultaneously asa surfactant, stabilizing and reducing
                      agent of Au(I) ions, avoiding in this case the addition
                      offurther chemicals into the reaction. The influence of
                      relativistic effects in the liquid phasesolution of Au ions
                      in an oxidation state +1 was investigated and demonstrated
                      that these Au(I)species can form complexes with oleylamine.
                      These complexes, which are believed to be formedthrough
                      aurophilic interactions can induce as demonstrated from a
                      series of spectroscopictechniques, the formation of such
                      ultrathin nanowires.Electrical resistors based on Au
                      nanowire devices were produced through the assembly ofthese
                      nanowires over silicon/silicon dioxide surfaces having
                      lithographically produced metalelectrodes to electrically
                      contact the nanowires. Electrical characterization showed
                      that theultrathin Au nanowires present an increase in
                      electrical resistance that was predicted by sizeeffects.
                      Additionally, correlating with observations from analysis of
                      high-resolution transmissionelectron microscopy, which
                      showed that the surface of the nanowires after the synthesis
                      wascovered with oleylamines molecules, the influence of
                      contact resistance in the junctionnanowires-metal electrodes
                      was investigated. Measurements of resistance dependent
                      ontemperature demonstrated that the junction resistances
                      were dominant and the linear electricalconduction presented
                      an activation energy only near room temperature. Surface
                      modification ofnanowires with alkanethiols presenting
                      functional groups with different charges when ionizedshowed
                      that the electrical resistance of nanowires can readily be
                      affected by minute amounts ofthese molecules on their
                      surface. Besides, I–V curves of these devices in solution
                      demonstratedthat the ionic charges of functional groups of
                      alkanethiols can promote re-arrangements inelectrical double
                      layer, and this can directly influence the electrical
                      transport on the nanowires.Finally, it was shown that these
                      devices were biocompatible and neuronal cells werenicely
                      grown on their top. Attempts to electrically stimulate and
                      record ionic currents from thesecells were performed and
                      demonstrated promising results to application of such
                      nanowires inelectrophysiological experiments with high
                      spatial resolution.},
      keywords     = {Nanodraht (gnd) / Gold (gnd) / Siliciumdioxid (gnd) /
                      Metalloberfläche (gnd) / Widerstand (gnd) /
                      Elektrophysiologie (gnd)},
      cin          = {ICS-8 / PGI-8-PT},
      ddc          = {500},
      cid          = {I:(DE-Juel1)ICS-8-20110106 / I:(DE-Juel1)PGI-8-PT-20110228},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/845764},
}