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@ARTICLE{Krger:826074,
      author       = {Kröger, Ingo and Stadtmüller, Benjamin and Kumpf,
                      Christian},
      title        = {{S}ubmonolayer and multilayer growth of
                      titaniumoxide-phthalocyanine on {A}g(111)},
      journal      = {New journal of physics},
      volume       = {18},
      number       = {11},
      issn         = {1367-2630},
      address      = {[Bad Honnef]},
      publisher    = {Dt. Physikalische Ges.},
      reportid     = {FZJ-2017-00334},
      pages        = {113022-1 - 113022-20},
      year         = {2016},
      abstract     = {For exploiting the full potential of organic materials for
                      future organic electronic devices it is of crucial
                      importance to understand structural and electronic
                      properties of metal-organic interfaces and adsorbate
                      systems, in particular electronic interactions and growth
                      mechanisms. Phthalocyanine molecules represent one class of
                      materials which are very frequently discussed in this
                      context. They feature an appealing tunability in terms of
                      structural, electronic and magnetic properties, simply by
                      exchanging the central (metal) atom or group of atoms. Here
                      we present a comprehensive study of one of the model systems
                      in this field, TiOPc on Ag(111). We discuss structure
                      formation and growth from submonolayer to multilayer films,
                      based on results obtained by electron diffraction, scanning
                      tunneling microscopy, electron energy loss spectroscopy,
                      x-ray standing waves, photoelectron spectroscopy and pair
                      potential calculations. Similar to related
                      metal-phthalocyanine adsorbate systems we find three
                      distinct phases in the submonolayer regime, a disordered
                      gas-like 'g-phase', a commensurate 'c2-phase' at low
                      temperature, and a 'p.o.l.-phase' consisting of a series of
                      point-on-line structures with continuously shrinking unit
                      cells. For the latter a uniform TiO-up configuration (Ti–O
                      group pointing towards vacuum) was found. Hence, the
                      first-layer molecules form a strong dipole layer, the dipole
                      moment of which is compensated by molecules adsorbing in the
                      second layer at hollow-sites in TiO-down geometry (Ti-O
                      group pointing towards the surface). The Coulomb interaction
                      between the dipole moments in the first and second layer
                      stabilizes this bilayer structure and causes a
                      bilayer-by-bilayer growth mode of molecular films above a
                      thickness of 2 ML. We report the structural properties
                      (vertical adsorption heights, inter-layer distances, inplane
                      orientations and positions) of the molecules in all phases
                      in detail, and discuss the effect of inelastic dynamical
                      charge transfer. Our results contribute to a comprehensive
                      understanding of this interesting adsorbate system and, in
                      comparison with earlier studies on CuPc, H2Pc and SnPc on
                      Ag(111), we shine new light on the interesting interplay of
                      molecule-molecule and molecule-substrate interactions.},
      cin          = {PGI-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-3-20110106},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000388515200005},
      doi          = {10.1088/1367-2630/18/11/113022},
      url          = {https://juser.fz-juelich.de/record/826074},
}