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@ARTICLE{PichardoPedrero:56024,
      author       = {Pichardo-Pedrero, E. and Giesen, M.},
      title        = {{C}omparative {STM} {S}tudies on island equilibrium shapes,
                      shape fluctuations and island coalescence on {A}u(001)
                      electrodes in chloric and sulfuric acid solutions},
      journal      = {Electrochimica acta},
      volume       = {52},
      issn         = {0013-4686},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PreJuSER-56024},
      pages        = {5659 - 5668},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We present scanning tunneling microscopy data on the
                      dynamics of monatomic high islands on gold electrodes in
                      different electrolytes. From a statistical analysis of the
                      island fluctuations around the equilibrium shape and from
                      the investigation of the local perimeter curvature of the
                      latter we determine the step line tension and the kink
                      energy of gold islands on an Au(0 0 1) surface as a function
                      of the electrode potential. We find that in chloric acid the
                      step line tension is smaller than for Au(0 0 1) in sulfuric
                      acid, however, the kink energy is much higher which leaves
                      us with the puzzling result that island fluctuations are
                      large, however, island edges are comparatively straight.
                      Both energies show merely a weak dependence on the electrode
                      potential in contrast to our previous findings in sulfuric
                      acid. Furthermore, by analyzing the relaxation time of
                      island coalescence events we determine the dominant mass
                      transport on the Au(0 0 1) electrode to be terrace diffusion
                      where the time limiting step of the migration process is the
                      creation of transport species at the island edge rather than
                      the hopping of species on the surface. This is in apparent
                      contradiction to previous results from island decay studies
                      where a diffusion limited terrace diffusion was found. All
                      results can be explained if one assumes that the relevant
                      mass transport species on Au(0 0 1) in chloride containing
                      electrolytes are larger (linear) structure units rather than
                      single adatoms. Possible candidates for these units are
                      Au-Cl complexes. (c) 2006 Elsevier Ltd. All rights
                      reserved.},
      keywords     = {J (WoSType)},
      cin          = {IBN-4},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB802},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK414},
      shelfmark    = {Electrochemistry},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000246655300018},
      doi          = {10.1016/j.electacta.2006.10.061},
      url          = {https://juser.fz-juelich.de/record/56024},
}