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@ARTICLE{Stampfer:828686,
      author       = {Stampfer, Christoph and Reichardt, Sven},
      title        = {{C}orrespondence: {O}n the nature of strong
                      piezoelectricity in graphene on {S}i{O}$_{2}$},
      journal      = {Nature Communications},
      volume       = {7},
      issn         = {2041-1723},
      address      = {London},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2017-02578},
      pages        = {11570 -},
      year         = {2016},
      abstract     = {Spatially resolved Raman spectroscopy and piezoresponse
                      force microscopy are very interesting and useful tools for
                      investigating properties of graphene and other
                      two-dimensional materials. In a recent article published in
                      Nature Communications, da Cunha Rodrigues et al.1 used both
                      methods to investigate single-layer graphene deposited on
                      SiO2 grating substrates. Interestingly, the authors report
                      on strong piezoelectricity and on high in-plane strain
                      values of $3–5\%$ in the supported graphene regions. It is
                      argued that the in-plane strain originates from the strong
                      interaction of the carbon atoms with the oxygen atoms of the
                      SiO2 substrate. Their finding of high in-plane strain is
                      crucial, as it is considered to be of the same origin as the
                      observed strong piezoelectricity in graphene on SiO2.
                      Unfortunately however, a major correction is needed. The
                      strain values reported by da Cunha Rodrigues et al. appear
                      to be more than a factor 50 too large, that is, the actual
                      strain in their investigated samples is only on the order of
                      $0.06–0.10\%$ or lower.},
      cin          = {PGI-9 / JARA-FIT},
      ddc          = {500},
      cid          = {I:(DE-Juel1)PGI-9-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {521 - Controlling Electron Charge-Based Phenomena
                      (POF3-521)},
      pid          = {G:(DE-HGF)POF3-521},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000375939200001},
      doi          = {10.1038/ncomms11570},
      url          = {https://juser.fz-juelich.de/record/828686},
}