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@ARTICLE{Stadtmller:201036,
      author       = {Stadtmüller, Benjamin and Gruenewald, Marco and Peuker,
                      Julia and Forker, Roman and Fritz, Torsten and Kumpf,
                      Christian},
      title        = {{M}olecular {E}xchange in a {H}eteromolecular
                      {PTCDA}/{C}u{P}c {B}ilayer {F}ilm on {A}g(111)},
      journal      = {The journal of physical chemistry / C},
      volume       = {118},
      number       = {49},
      issn         = {1932-7455},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2015-03346},
      pages        = {28592 - 28602},
      year         = {2014},
      abstract     = {The future success of organic semiconductors in electronic
                      or spintronic devices depends crucially on the ability to
                      control the properties of molecular thin films. Metal
                      contacts as well as interfaces formed by different organic
                      materials are of equal importance in this context. A model
                      system contributing to the improvement of the fundamental
                      understanding of such interfaces is the heteromolecular
                      bilayer film formed by
                      3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) grown
                      on a well ordered CuPc monolayer on Ag(111). Using
                      complementary experimental techniques, we are able to reveal
                      a molecular exchange across this heteromolecular interface.
                      At the initial stage of the PTCDA deposition, some of these
                      molecules diffuse into the CuPc layer and displace CuPc
                      molecules to the second layer. This inhibits the formation
                      of a smooth interface between both species and results in a
                      structurally disordered heteromolecular CuPc-PTCDA film in
                      the first and randomly arranged CuPc molecules as well as
                      ordered PTCDA islands in the second layer. While the second
                      organic layer is electronically decoupled from the
                      underlying layer, the first layer, although disordered,
                      shows a charge reorganization and an adsorption height
                      alignment of CuPc and PTCDA as it is known for highly
                      ordered heteromolecular monolayer structures on Ag(111). The
                      molecular exchange, which we consistently find in all our
                      experimental data, is the result of a lower adsorption
                      energy gain of PTCDA on Ag(111) compared to CuPc on
                      Ag(111).},
      cin          = {PGI-3 / JARA-FIT},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-3-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {422 - Spin-based and quantum information (POF2-422)},
      pid          = {G:(DE-HGF)POF2-422},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000346321700030},
      doi          = {10.1021/jp5078104},
      url          = {https://juser.fz-juelich.de/record/201036},
}