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@ARTICLE{Wei:904343,
      author       = {Weiß, Lennart J. K. and Music, Emir and Rinklin, Philipp
                      and Straumann, Lea and Grob, Leroy and Mayer, Dirk and
                      Wolfrum, Bernhard},
      title        = {{E}ngineering {E}lectrostatic {R}epulsion of {M}etal
                      {N}anoparticles for {R}educed {A}dsorption in
                      {S}ingle-{I}mpact {E}lectrochemical {R}ecordings},
      journal      = {ACS applied nano materials},
      volume       = {4},
      number       = {8},
      issn         = {2574-0970},
      address      = {Washington, DC},
      publisher    = {ACS Publications},
      reportid     = {FZJ-2021-05913},
      pages        = {8314 - 8320},
      year         = {2021},
      abstract     = {Stochastic impact electrochemistry is a promising concept
                      to detect ultralow concentrations of nanoparticles in
                      solution. However, statistically reliable sensor outputs
                      require an appropriate number of observed nanoparticle
                      collision events. Here, arrays of individually addressable
                      electrodes allow increasing the effective detection area,
                      and thereby the number of collision events, without
                      sacrificing the signal-to-noise ratio. At the same time,
                      however, these measurements typically increase the
                      surface-to-volume ratio of the system, leading to a stronger
                      influence of adsorption on the number of available
                      particles. We address this issue of nanoparticle adsorption
                      by controlling the electrode–electrolyte interface close
                      to the detection electrodes. We use a direct nanoimpact
                      experiment to demonstrate that a negatively charged surface
                      leads to electrostatic repulsion, which results in a
                      2.5-fold increase in the number of detected collision
                      events. Adding to this improved sensor performance, a
                      tunable shield electrode offers a versatile tool to study
                      nanoparticle adsorption at the solid–liquid interface.},
      cin          = {IBI-3},
      ddc          = {540},
      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},
      UT           = {WOS:000692034900073},
      doi          = {10.1021/acsanm.1c01507},
      url          = {https://juser.fz-juelich.de/record/904343},
}