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@ARTICLE{Wagner:201037,
      author       = {Wagner, Christian and Fournier, Norman and Ruiz, Victor G.
                      and Li, Chen and Müllen, Klaus and Rohlfing, Michael and
                      Tkatchenko, Alexandre and Temirov, Ruslan and Tautz, Frank
                      Stefan},
      title        = {{N}on-additivity of molecule-surface van der {W}aals
                      potentials from force measurements},
      journal      = {Nature Communications},
      volume       = {5},
      issn         = {2041-1723},
      address      = {London},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2015-03347},
      pages        = {5568},
      year         = {2014},
      abstract     = {Van der Waals (vdW) forces act ubiquitously in condensed
                      matter. Despite being weak on an atomic level, they
                      substantially influence molecular and biological systems due
                      to their long range and system-size scaling. The difficulty
                      to isolate and measure vdW forces on a single-molecule level
                      causes our present understanding to be strongly theory
                      based. Here we show measurements of the attractive potential
                      between differently sized organic molecules and a metal
                      surface using an atomic force microscope. Our choice of
                      molecules and the large molecule-surface separation cause
                      this attraction to be purely of vdW type. The experiment
                      allows testing the asymptotic vdW force law and its validity
                      range. We find a superlinear growth of the vdW attraction
                      with molecular size, originating from the increased
                      deconfinement of electrons in the molecules. Because such
                      non-additive vdW contributions are not accounted for in most
                      first-principles or empirical calculations, we suggest
                      further development in that direction.},
      cin          = {PGI-3 / JARA-FIT},
      ddc          = {500},
      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:000345914100003},
      pubmed       = {pmid:25424490},
      doi          = {10.1038/ncomms6568},
      url          = {https://juser.fz-juelich.de/record/201037},
}