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@ARTICLE{Ktelhn:154829,
      author       = {Kätelhön, Enno and Mayer, Dirk and Banzet, Marko and
                      Offenhäusser, Andreas and Wolfrum, Bernhard},
      title        = {{N}anocavity crossbar arrays for parallel electrochemical
                      sensing on a chip},
      journal      = {Beilstein journal of nanotechnology},
      volume       = {5},
      issn         = {2190-4286},
      address      = {Frankfurt, Main},
      publisher    = {Beilstein-Institut zur Förderung der Chemischen
                      Wissenschaften},
      reportid     = {FZJ-2014-04097},
      pages        = {1137 - 1143},
      year         = {2014},
      abstract     = {We introduce a novel device for the mapping of redox-active
                      compounds at high spatial resolution based on a crossbar
                      electrode architecture. The sensor array is formed by two
                      sets of 16 parallel band electrodes that are arranged
                      perpendicular to each other on the wafer surface. At each
                      intersection, the crossing bars are separated by a ca. 65 nm
                      high nanocavity, which is stabilized by the surrounding
                      passivation layer. During operation, perpendicular bar
                      electrodes are biased to potentials above and below the
                      redox potential of species under investigation, thus,
                      enabling repeated subsequent reactions at the two
                      electrodes. By this means, a redox cycling current is formed
                      across the gap that can be measured externally. As the
                      nanocavity devices feature a very high current amplification
                      in redox cycling mode, individual sensing spots can be
                      addressed in parallel, enabling high-throughput
                      electrochemical imaging. This paper introduces the design of
                      the device, discusses the fabrication process and
                      demonstrates its capabilities in sequential and parallel
                      data acquisition mode by using a hexacyanoferrate probe.},
      cin          = {PGI-8 / JARA-FIT},
      ddc          = {620},
      cid          = {I:(DE-Juel1)PGI-8-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {423 - Sensorics and bioinspired systems (POF2-423)},
      pid          = {G:(DE-HGF)POF2-423},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000339286100001},
      doi          = {10.3762/bjnano.5.124},
      url          = {https://juser.fz-juelich.de/record/154829},
}