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@ARTICLE{Liang:865139,
      author       = {Liang, Yuanying and Brings, Fabian and Maybeck, Vanessa and
                      Ingebrandt, Sven and Wolfrum, Bernhard and Pich, Andrij and
                      Offenhäusser, Andreas and Mayer, Dirk},
      title        = {{T}uning {C}hannel {A}rchitecture of {I}nterdigitated
                      {O}rganic {E}lectrochemical {T}ransistors for {R}ecording
                      the {A}ction {P}otentials of {E}lectrogenic {C}ells},
      journal      = {Advanced functional materials},
      volume       = {29},
      number       = {29},
      issn         = {1616-3028},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2019-04691},
      pages        = {1902085 -},
      year         = {2019},
      abstract     = {Organic electrochemical transistors (OECTs) have emerged as
                      versatile electrophysiological sensors due to their high
                      transconductance, biocompatibility, and transparent channel
                      material. High maximum transconductances are demonstrated
                      facilitating the extracellular recording of signals from
                      electrogenic cells. However, this requires large channel
                      dimensions and thick polymer films. These large channel
                      dimensions lead to low transistor densities. Here,
                      interdigitated OECTs (iOECTs) are introduced, which feature
                      high transconductances at small device areas. A superior
                      device performance is achieved by systematically optimizing
                      the electrode layout regarding channel length, number of
                      electrode fingers and electrode width. Interestingly, the
                      maximum transconductance (gmax) does not straightforwardly
                      scale with the channel width‐to‐length ratio, which is
                      different from planar OECTs. This deviation is caused by the
                      dominating influence of the source–drain series resistance
                      Rsd for short channel devices. Of note, there is a critical
                      channel length (15 µm) above which the channel resistance
                      Rch becomes dominant and the device characteristics converge
                      toward those of planar OECTs. Design rules for engineering
                      the performance of iOECTs are proposed and tested by
                      recording action potentials of cardiomyocyte‐like HL‐1
                      cells with high signal‐to‐noise ratios. These results
                      demonstrate that interdigitated OECTs meet two requirements
                      of bioelectronic applications, namely, high device
                      performance and small channel dimensions.},
      cin          = {ICS-8},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-8-20110106},
      pnm          = {523 - Controlling Configuration-Based Phenomena (POF3-523)},
      pid          = {G:(DE-HGF)POF3-523},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000478629500020},
      doi          = {10.1002/adfm.201902085},
      url          = {https://juser.fz-juelich.de/record/865139},
}