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@ARTICLE{Felter:863489,
      author       = {Felter, Janina and Raths, Miriam and Franke, Markus and
                      Kumpf, Christian},
      title        = {{I}n-situ study of two-dimensional dendritic growth of
                      hexagonal boron nitride},
      journal      = {2D Materials},
      volume       = {6},
      number       = {4},
      issn         = {2053-1583},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2019-03543},
      pages        = {045005},
      year         = {2019},
      abstract     = {Hexagonal boron nitride, often entitled the "white
                      graphene" because of its large band gap, is one of the most
                      important two-dimensional (2D) materials and frequently
                      investigated in context with stacked arrays of single 2D
                      layers, so called van der Waals heterostructures. Here, we
                      concentrate on the growth of hBN on the coinage metal
                      surface Cu(111). Using low energy electron microscopy and
                      diffraction, we investigate the self-terminated growth of
                      the first layer in-situ and in real time. Most prominently,
                      we find dendritic structures with three strongly preferred
                      growth branches that are mostly well aligned with the
                      Cu(111) substrate and exhibit a three-fold symmetric shape.
                      The observation of dendritic structures is very surprising
                      since hBN was found to grow in compact, triangular-shaped
                      islands on many other metal substrates, in particular, on
                      transition metal surfaces where it shows a much stronger
                      interaction to the surface. We explain the unexpected
                      dendritic growth by an asymmetry of the bonding energy for
                      the two possible ways a borazine molecule can attach to an
                      existing hBN island, namely either with one of its boron or
                      one of its nitrogen atoms. We suggest that this asymmetry
                      originates from different dehydrogenation states of the
                      adsorbed borazine molecules and the hBN islands. We call
                      this mechanism "Dehydrogenation Limited Aggregation'' since
                      it is generic in the sense that it is merely based on
                      different dehydrogenation energies for the involved building
                      blocks forming the 2D layer.},
      cin          = {PGI-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-3-20110106},
      pnm          = {141 - Controlling Electron Charge-Based Phenomena
                      (POF3-141)},
      pid          = {G:(DE-HGF)POF3-141},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000476954200005},
      doi          = {10.1088/2053-1583/ab2926},
      url          = {https://juser.fz-juelich.de/record/863489},
}