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@ARTICLE{Krause:187933,
      author       = {Krause, Kay J. and Kätelhön, Enno and Lemay, Serge G. and
                      Compton, Richard G. and Wolfrum, Bernhard},
      title        = {{S}ensing with nanopores – the influence of asymmetric
                      blocking on electrochemical redox cycling current},
      journal      = {The analyst},
      volume       = {139},
      number       = {21},
      issn         = {1364-5528},
      address      = {Cambridge},
      publisher    = {Soc.},
      reportid     = {FZJ-2015-01443},
      pages        = {5499 - 5503},
      year         = {2014},
      abstract     = {Nanoporous redox cycling devices are highly efficient tools
                      for the electrochemical sensing of redox-active molecules.
                      By using a redox-active mediator, this concept can be
                      exploited for the detection of molecular binding events via
                      blocking of the redox cycling current within the nanopores.
                      Here, we investigate the influence of different blocking
                      scenarios inside a nanopore on the resulting redox cycling
                      current. Our analysis is based on random walk simulations
                      and finite element calculations. We distinguish between
                      symmetric and asymmetric pore blocking and show that the
                      current decrease is more pronounced in the case of
                      asymmetric blocking reflecting the diffusion-driven pathway
                      of the redox-active molecules. Using random walk
                      simulations, we further study the impact of pore blocking in
                      the frequency domain and identify relevant features of the
                      power spectral density, which are of particular interest for
                      sensing applications based on fluctuation analysis.},
      cin          = {PGI-8 / JARA-FIT},
      ddc          = {540},
      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:000343003700025},
      doi          = {10.1039/C4AN01401D},
      url          = {https://juser.fz-juelich.de/record/187933},
}