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@MASTERSTHESIS{Wang:828407,
      author       = {Wang, Junmiao},
      title        = {{S}urface {P}otential of {M}etallic {S}urfaces and
                      {S}elf-{A}ssembling {O}rganic {M}onolayers in {V}arious
                      {E}lectrolytes},
      volume       = {137},
      school       = {RWTH Aachen},
      type         = {MS},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2017-02368},
      isbn         = {978-3-95806-188-0},
      series       = {Schriften des Forschungszentrums Jülich. Reihe
                      Schlüsseltechnologien / Key Technologies},
      pages        = {II, 58 S.},
      year         = {2016},
      note         = {RWTH Aachen, Masterarbeit, 2016},
      abstract     = {The aim of this thesis is to systematically investigate the
                      ζ potential of different surfaces (polypropylene,
                      borosilicate glass, Pt and Au thin films, and
                      self-assembling monolayer) in different chloride
                      electrolytes XCl (X = Li, Na, or K), focusing on the pH- and
                      concentration-dependent ζ potential and the surface
                      treatment with oxygen. The experiments were performed with a
                      modified “SurPASS Electrokinetic Analyzer” using the
                      streaming potential and streaming current methods. The
                      pH-dependent ζ potential analysis of borosilicate glass,
                      Pt, and Au shows that, Pt possesses the highest ζ
                      potential, followed by borosilicate glass and Au for all
                      chloride electrolytes. The impact of the different
                      electrolytes on the ζ potential is more complex. The oxygen
                      activation of the metallic surfaces seems to lead to the
                      formation of a thin oxide layer, which seems to be less
                      stable for Pt than for Au, whereas we obtained a stable
                      oxygen activation for the oxide borosilicate glass. At large
                      Debye length (i.e. low electrolyte concentration), the ζ
                      potential changes linearly with decreasing Debye length down
                      to a “critical” Debye length. The “critical” Debye
                      length is different for the different surfaces: 0.7 – 0.9
                      nm for borosilicate glass, 0.5 – 1.2 nm for Pt, and 1.35
                      – 2 nm for APTES. Below the “critical” Debye length,
                      the ζ potential drops strongly. We explain the unusual and
                      transient streaming current-pressure correlation in this
                      regime by a complex adsorption/desorption process for the
                      ions at the surface. As a result, the classic electrical
                      double layer model has to be modified for high electrolyte
                      concentrations. For organic layers this is even more
                      complex, since several surface contributions arising from
                      the molecules and the carrier have to be taken into
                      account.},
      cin          = {PGI-8 / ICS-8},
      cid          = {I:(DE-Juel1)PGI-8-20110106 / I:(DE-Juel1)ICS-8-20110106},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)19},
      url          = {https://juser.fz-juelich.de/record/828407},
}