@article{ZhangZhangYouetal.2014,
  author    = {Zhang, Xiaoqing and Zhang, Xinwu and You, Qiong and Sessler, Gerhard M.},
  title     = {Low- cost, large- area, stretchable piezoelectric films based on irradiation- crosslinked poly ( propylene)},
  series = {Macromolecular materials and engineering},
  volume    = {299},
  journal   = {Macromolecular materials and engineering},
  number    = {3},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1438-7492},
  doi       = {10.1002/mame.201300161},
  pages     = {290 -- 295},
  year      = {2014},
  abstract  = {Low cost, large area, lightweight, stretchable piezoelectric films, based on space-charge electret with a foam structure (i.e., ferroelectrets or piezoelectrets), have been fabricated by using commercially available irradiation cross-linked poly(propylene) (IXPP) foam sheets. Piezoelectric d(33) coefficients are as high as 100pCN(-1). The piezoelectric performance in such IXPP films is well preserved for repeated strains of less than 10\%. Piezoelectric d(33) coefficients are frequency independent in the range from 2 to 100Hz. Such new class materials may be applied in sensory skins, smart clothing, bio-inspired systems, microenergy harvesters, and so on.},
  language  = {en}
}
@article{QiuWegenerWirgesetal.2005,
  author    = {Qiu, X. L. and Wegener, Michael and Wirges, Werner and Zhang, X. Q. and Hillenbrand, J. and Xia, Zhongfu and Gerhard, Reimund and Sessler, G. M.},
  title     = {Penetration of sulfur hexafluoride into cellular polypropylene films and its effect on the electric charging and electromechanical response of ferroelectrets},
  issn      = {0022-3727},
  year      = {2005},
  abstract  = {Cellular polypropylene (PP) films were treated with sulfur hexafluoride (SF6) gas in order to study the SF6 penetration behaviour and optimize the electric charging conditions. There were differences in the penetration of SF6 for different cellular PP materials, depending on the microscopic properties, which manifest themselves in the voided structure as well as in the mechanical stiffnesses of the cellular films. The penetration of SF6 after long-term pressure treatment is confirmed in strongly inflated cellular PP films with a low mechanical stiffness of about 1 MPa. No SF6 penetration occurs for slightly inflated cellular PP films with smaller void sizes and higher mechanical stiffnesses of around 5.8 MPa. The observed thickness variations, the higher charging fields during corona charging because of SF6 penetration and the SF6 environment, as well as the resulting electromechanical properties are discussed},
  language  = {en}
}
@article{BauerGerhardSessler2004,
  author    = {Bauer, Siegfried and Gerhard, Reimund and Sessler, G. M.},
  title     = {Ferroelectrets : soft electroactive foams for transducers},
  year      = {2004},
  language  = {en}
}
@article{GerhardSessler1996,
  author    = {Gerhard, Reimund and Sessler, G. M.},
  title     = {A tribute to Professor Bernhard Gross},
  year      = {1996},
  language  = {en}
}