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@ARTICLE{AlShakran:828439,
      author       = {Al-Shakran, Mohammad and Kibler, Ludwig A. and Jacob, Timo
                      and Ibach, Harald and Beltramo, Guillermo and Giesen,
                      Margret},
      title        = {{R}epulsive interactions induced by specific adsorption:
                      {A}nomalous step diffusivity and inadequacy of
                      nearest-neighbor {I}sing model},
      journal      = {Surface science},
      volume       = {651},
      issn         = {0039-6028},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {FZJ-2017-02398},
      pages        = {84 - 93},
      year         = {2016},
      abstract     = {This is Part I of two closely related papers, where we show
                      that the specific adsorption of anions leads to a failure of
                      the nearest-neighbor Ising model to describe island
                      perimeter curvatures on Au(100) electrodes in dilute KBr,
                      HCl and H2SO4 electrolytes and the therewith derived step
                      diffusivity vs. step orientation. This result has major
                      consequences for theoretical studies aiming at the
                      understanding of growth, diffusion and degradation
                      phenomena. Part I focuses on the experimental data.As shown
                      theoretically in detail in Part II
                      (doi:10.1016/j.susc.2016.03.022), a set of nearest-neighbor
                      and next-nearest-neighbor interaction energies (ϵNN, ϵNNN)
                      can uniquely be derived from the diffusivity of steps along
                      〈100〉 and 〈110〉. We find strong repulsive
                      next-nearest neighbor (NNN) interaction in KBr and HCl,
                      whereas NNN interaction is negligibly for H2SO4. The NNN
                      repulsive interaction energy ϵNNN therefore correlates
                      positively with the Gibbs adsorption energy of the anions.
                      We find furthermore that ϵNNN increases with increasing
                      Br− and Cl− coverage.The results for ϵNN and ϵNNN are
                      quantitatively consistent with the coverage dependence of
                      the step line tension. We thereby establish a sound
                      experimental base for theoretical studies on the energetics
                      of steps in the presence of specific adsorption.},
      cin          = {PGI-6 / PGI-3 / ICS-7},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-6-20110106 / I:(DE-Juel1)PGI-3-20110106 /
                      I:(DE-Juel1)ICS-7-20110106},
      pnm          = {522 - Controlling Spin-Based Phenomena (POF3-522)},
      pid          = {G:(DE-HGF)POF3-522},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000379105500013},
      doi          = {10.1016/j.susc.2016.03.021},
      url          = {https://juser.fz-juelich.de/record/828439},
}