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@ARTICLE{Hske:150206,
      author       = {Hüske, Martin and Stockmann, Regina and Offenhäusser,
                      Andreas and Wolfrum, Bernhard},
      title        = {{R}edox cycling in nanoporous electrochemical devices},
      journal      = {Nanoscale},
      volume       = {6},
      number       = {1},
      issn         = {2040-3372},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {FZJ-2014-00285},
      pages        = {589 -598},
      year         = {2014},
      abstract     = {Nanoscale redox cycling is a powerful technique for
                      detecting electrochemically active molecules, based on fast
                      repetitive oxidation and reduction reactions. An ideal
                      implementation of redox cycling sensors can be realized by
                      nanoporous dual-electrode systems in easily accessible and
                      scalable geometries. Here, we introduce a multi-electrode
                      array device with highly efficient nanoporous redox cycling
                      sensors. Each of the sensors holds up to 209[thin space
                      (1/6-em)]000 well defined nanopores with minimal pore radii
                      of less than 40 nm and an electrode separation of
                      [similar]100 nm. We demonstrate the efficiency of the
                      nanopore array by screening a large concentration range over
                      three orders of magnitude with area-specific sensitivities
                      of up to 81.0 mA (cm−2 mM−1) for the redox-active probe
                      ferrocene dimethanol. Furthermore, due to the specific
                      geometry of the material, reaction kinetics has a unique
                      potential-dependent impact on the signal characteristics. As
                      a result, redox cycling experiments in the nanoporous
                      structure allow studies on heterogeneous electron transfer
                      reactions revealing a surprisingly asymmetric transfer
                      coefficient.},
      cin          = {ICS-8 / PGI-8 / JARA-FIT},
      ddc          = {600},
      cid          = {I:(DE-Juel1)ICS-8-20110106 / I:(DE-Juel1)PGI-8-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {423 - Sensorics and bioinspired systems (POF2-423) / 453 -
                      Physics of the Cell (POF2-453) / Helmholtz Young
                      Investigators Group (HGF-YoungInvestigatorsGroup)},
      pid          = {G:(DE-HGF)POF2-423 / G:(DE-HGF)POF2-453 /
                      G:(DE-HGF)HGF-YoungInvestigatorsGroup},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000328673000070},
      pubmed       = {pmid:24247480},
      doi          = {10.1039/c3nr03818a},
      url          = {https://juser.fz-juelich.de/record/150206},
}