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@ARTICLE{Schusser:150594,
      author       = {Schusser, S. and Menzel, S. and Bäcker, M. and Leinhos, M.
                      and Poghossian, A. and Wagner, P. and Schöning, M. J.},
      title        = {{D}egradation of thin poly(lactic acid) films:
                      {C}haracterization by capacitance–voltage, atomic force
                      microscopy, scanning electron microscopy and contact-angle
                      measurements.},
      journal      = {Electrochimica acta},
      volume       = {113},
      issn         = {0013-4686},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2014-00643},
      pages        = {779 - 784},
      year         = {2013},
      abstract     = {For the development of new biopolymers and implantable
                      biomedical devices with predicted biodegradability, simple,
                      non-destructive, fast and inexpensive techniques capable for
                      real-time in situ testing of the degradation kinetics of
                      polymers are highly appreciated. In this work, a capacitive
                      field-effect electrolyte–insulator–semiconductor (EIS)
                      sensor has been applied for real-time in situ monitoring of
                      degradation of thin poly(d,l-lactic acid) (PDLLA) films over
                      a long-time period of one month. Generally, the
                      polymer-modified EIS (PMEIS) sensor is capable of detecting
                      any changes in the bulk, surface and interface properties of
                      the polymer (e.g., thickness, coverage, dielectric constant,
                      surface potential) induced by degradation processes. The
                      time-dependent capacitance–voltage (C–V) characteristics
                      of PMEIS structures were used as an indicator of the polymer
                      degradation. To accelerate the PDLLA degradation,
                      experiments were performed in alkaline buffer solution of pH
                      10.6. The results of these degradation measurements with the
                      EIS sensor were verified by the detection of lactic acid
                      (product of the PDLLA degradation) in the degradation
                      medium. In addition, the micro-structural and morphological
                      changes of the polymer surface induced by the polymer
                      degradation have been systematically studied by means of
                      scanning-electron microscopy, atomic-force microscopy,
                      optical microscopy, and contact-angle measurements.},
      cin          = {PGI-8 / JARA-FIT / ICS-8},
      ddc          = {540},
      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:000330491500099},
      doi          = {10.1016/j.electacta.2013.08.025},
      url          = {https://juser.fz-juelich.de/record/150594},
}