@article{KuenstlerGerhard1998,
  author    = {K{\"u}nstler, Wolfgang and Gerhard, Reimund},
  title     = {Charge profiles in corona- or electrode-charged fluoropolymers},
  year      = {1998},
  language  = {en}
}
@article{WegenerWirgesRichteretal.2001,
  author    = {Wegener, Michael and Wirges, Werner and Richter, Kristin and K{\"u}nstler, Wolfgang and Gerhard, Reimund},
  title     = {Charge stability and piezoelectric properties of porous fluoro-polymer space-charge electrets in layer systems},
  year      = {2001},
  language  = {en}
}
@book{HinrichsenRabeKuenstler1999,
  author    = {Hinrichsen, G. and Rabe, J. P. and K{\"u}nstler, Wolfgang},
  title     = {European Conference on Macromolecular Physics : molecular orientation in polymers ; generation, characterisation, application},
  series = {Europhysics conference abstracts},
  volume    = {23H},
  journal   = {Europhysics conference abstracts},
  editor    = {Gerhard, Reimund},
  publisher = {European Physical Society},
  address   = {Geneva [u.a.]},
  pages     = {XIII, 151 S.},
  year      = {1999},
  language  = {en}
}
@article{WegenerKuenstlerRichteretal.2002,
  author    = {Wegener, Michael and K{\"u}nstler, Wolfgang and Richter, Kristin and Gerhard, Reimund},
  title     = {Ferroelectric polarization in stretched piezo- and pyroelectric poly(vinylidene fluoride-hexafluoropropylene) copolymer films},
  year      = {2002},
  language  = {en}
}
@article{GerhardKuenstlerEberleetal.1998,
  author    = {Gerhard, Reimund and K{\"u}nstler, Wolfgang and Eberle, G. and Eisenmenger, E. and Yang, G. M.},
  title     = {High space densities in the bulk of fluoropolymer elctrets detected with piezoelectrically generated pressure steps},
  year      = {1998},
  language  = {en}
}
@article{XiaGerhardKuenstleretal.1999,
  author    = {Xia, Zhongfu and Gerhard, Reimund and K{\"u}nstler, Wolfgang and Wedel, Armin and Danz, Rudi},
  title     = {High surface-charge stability of porous polytetrafluoroethylene electret films at room and elvated temperatures},
  year      = {1999},
  language  = {en}
}
@article{GerhardWegenerKuenstleretal.2000,
  author    = {Gerhard, Reimund and Wegener, Michael and K{\"u}nstler, Wolfgang and Wirges, Werner and G{\"o}rne, Thomas and Urayama, D. and Neher, Dieter},
  title     = {Inverse piezoelectricity of porous PTFE films with bipolar space charge},
  year      = {2000},
  language  = {en}
}
@article{WegenerKuenstlerGerhard2004,
  author    = {Wegener, Michael and K{\"u}nstler, Wolfgang and Gerhard, Reimund},
  title     = {Piezo-, pyro- and ferroelectricity in poly (vinylidene fluoride-hexafluoropropylene) copolymer films},
  year      = {2004},
  abstract  = {Thin films of poly(vinylidene fluoride-hexafluoropropylene) P(VDF-HFP) show significant electroactive properties, such as piezoelectricity, pyroelectricity and electrostriction. Suitable polar P(VDF-HFP) copolymer films can be prepared by melt-pressing or solution-casting. Dipolar orientation causes the macroscopic polarization and thus also the symmetry breaking necessary for electroactive properties. We discuss the polarization build-up in thin, stretched and non-stretched, films of P(VDF-HFP) copolymer with a HFP content of 15\%. Poling currents measured in-situ during electric poling are analyzed and the polarization is calculated. Suitable electric poling leads to hysteresis phenomena of the polarization as a function of the electric field as well as to significant polarization during switching experiments. Our results indicate dipolar orientation also in non-stretched P(VDF-HFP) films},
  language  = {en}
}
@article{ZhongFuShanShanJiaQianetal.2003,
  author    = {Zhong-Fu, X. and Shan-Shan, M. and Jia-Qian, Z. and Xun-Lin, Q. and Ye-Wen, Z. and Gerhard, Reimund and K{\"u}nstler, Wolfgang},
  title     = {Piezoelectric activity and its stability of polytetrafluoroethylene (PTFE) films},
  year      = {2003},
  language  = {en}
}
@article{KuenstlerXiaWeinholdetal.2000,
  author    = {K{\"u}nstler, Wolfgang and Xia, Zhongfu and Weinhold, Till and Pucher, Andreas and Gerhard, Reimund},
  title     = {Piezoelectricity of porous polytetrafluoroethylene single- and multiple-film electrets containing high charge densities of both polarities},
  year      = {2000},
  language  = {en}
}