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@ARTICLE{Oliveira:904356,
      author       = {Oliveira, Danilo A. and Molinnus, Denise and Beging, Stefan
                      and Siqueira, José R. and Schöning, Michael J.},
      title        = {{B}iosensor {B}ased on {S}elf‐{A}ssembled {F}ilms of
                      {G}raphene {O}xide and {P}olyaniline {U}sing a
                      {F}ield‐{E}ffect {D}evice {P}latform},
      journal      = {Physica status solidi / A},
      volume       = {218},
      number       = {13},
      issn         = {0031-8965},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2021-05926},
      pages        = {2000747 -},
      year         = {2021},
      abstract     = {A new functionalization method to modify capacitive
                      electrolyte–insulator–semiconductor (EIS) structures
                      with nanofilms is presented. Layers of polyallylamine
                      hydrochloride (PAH) and graphene oxide (GO) with the
                      compound
                      polyaniline:poly(2-acrylamido-2-methyl-1-propanesulfonic
                      acid) (PANI:PAAMPSA) are deposited onto a p-Si/SiO2 chip
                      using the layer-by-layer technique (LbL). Two different
                      enzymes (urease and penicillinase) are separately
                      immobilized on top of a five-bilayer stack of the
                      PAH:GO/PANI:PAAMPSA-modified EIS chip, forming a biosensor
                      for detection of urea and penicillin, respectively.
                      Electrochemical characterization is performed by constant
                      capacitance (ConCap) measurements, and the film morphology
                      is characterized by atomic force microscopy (AFM) and
                      scanning electron microscopy (SEM). An increase in the
                      average sensitivity of the modified biosensors
                      (EIS–nanofilm–enzyme) of around $15\%$ is found in
                      relation to sensors, only carrying the enzyme but without
                      the nanofilm (EIS–enzyme). In this sense, the nanofilm
                      acts as a stable bioreceptor onto the EIS chip improving the
                      output signal in terms of sensitivity and stability.},
      cin          = {IBI-3},
      ddc          = {530},
      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:000613842900001},
      doi          = {10.1002/pssa.202000747},
      url          = {https://juser.fz-juelich.de/record/904356},
}