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@ARTICLE{Schusser:150598,
      author       = {Schusser, S. and Poghossian, A. and Bäcker, M. and
                      Leinhos, M. and Wagner, P. and Schöning, M. J.},
      title        = {{C}haracterization of biodegradable polymers with
                      capacitive field-effect sensors.},
      journal      = {Sensors and actuators / B},
      volume       = {187},
      issn         = {0925-4005},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2014-00647},
      pages        = {2 - 7},
      year         = {2013},
      abstract     = {In vitro studies of the degradation kinetic of biopolymers
                      are essential for the design and optimization of implantable
                      biomedical devices. In the presented work, a field-effect
                      capacitive sensor has been applied for the real-time and in
                      situ monitoring of degradation processes of biopolymers for
                      the first time. The polymer-covered field-effect sensor is,
                      in principle, capable to detect any changes in bulk, surface
                      and interface properties of the polymer induced by
                      degradation processes. The feasibility of this approach has
                      been experimentally proven by using the commercially
                      available biomedical polymer poly(d,l-lactic acid) (PDLLA)
                      as a model system. PDLLA films of different thicknesses were
                      deposited on the Ta2O5-gate surface of the field-effect
                      structure from a polymer solution by means of spin-coating
                      method. The polymer-modified field-effect sensors have been
                      characterized by means of capacitance–voltage and
                      impedance-spectroscopy method. The degradation of the PDLLA
                      was accelerated by changing the degradation medium from
                      neutral (pH 7.2) to alkaline (pH 9) condition, resulting in
                      drastic changes in the capacitance and impedance spectra of
                      the polymer-modified field-effect sensor.},
      cin          = {PGI-8 / JARA-FIT / ICS-8},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-8-20110106 / $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)ICS-8-20110106},
      pnm          = {423 - Sensorics and bioinspired systems (POF2-423) / 453 -
                      Physics of the Cell (POF2-453)},
      pid          = {G:(DE-HGF)POF2-423 / G:(DE-HGF)POF2-453},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000324298300002},
      doi          = {10.1016/j.snb.2012.07.099},
      url          = {https://juser.fz-juelich.de/record/150598},
}