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@ARTICLE{Wei:1005152,
      author       = {Weiß, Lennart JK and Lubins, Georg and Music, Emir and
                      Rinklin, Philipp and Banzet, Marko and Peng, Hu and Terkan,
                      Korkut and Mayer, Dirk and Wolfrum, Bernhard},
      title        = {{S}ingle-{I}mpact {E}lectrochemistry in {P}aper-{B}ased
                      {M}icrofluidics},
      journal      = {ACS sensors},
      volume       = {7},
      number       = {3},
      issn         = {2379-3694},
      address      = {Washington, DC},
      publisher    = {ACS Publications},
      reportid     = {FZJ-2023-01340},
      pages        = {884-892},
      year         = {2022},
      abstract     = {Microfluidic paper-based analytical devices (μPADs) have
                      experienced an unprecedented story of success. In
                      particular, as of today, most people have likely come into
                      contact with one of their two most famous examples─the
                      pregnancy or the SARS-CoV-2 antigen test. However, their
                      sensing performance is constrained by the optical readout of
                      nanoparticle agglomeration, which typically allows only
                      qualitative measurements. In contrast, single-impact
                      electrochemistry offers the possibility to quantify species
                      concentrations beyond the pM range by resolving collisions
                      of individual species on a microelectrode. Within this work,
                      we investigate the integration of stochastic sensing into a
                      μPAD design by combining a wax-patterned microchannel with
                      a microelectrode array to detect silver nanoparticles
                      (AgNPs) by their oxidative dissolution. In doing so, we
                      demonstrate the possibility to resolve individual
                      nanoparticle collisions in a reference-on-chip
                      configuration. To simulate a lateral flow architecture, we
                      flush previously dried AgNPs along a microchannel toward the
                      electrode array, where we are able to record nanoparticle
                      impacts. Consequently, single-impact electrochemistry poses
                      a promising candidate to extend the limits of lateral
                      flow-based sensors beyond current applications toward a fast
                      and reliable detection of very dilute species on site.},
      cin          = {IBI-3},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBI-3-20200312},
      pnm          = {5241 - Molecular Information Processing in Cellular Systems
                      (POF4-524)},
      pid          = {G:(DE-HGF)POF4-5241},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {35235291},
      UT           = {WOS:000785008500023},
      doi          = {10.1021/acssensors.1c02703},
      url          = {https://juser.fz-juelich.de/record/1005152},
}