Robotic Materials

Cellular Ferroelectrets for Electroactive Polymer Hybrid Systems: Soft Matter Integrated Devices with Advanced Functionality

2008

Conference Paper

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Thin polymer foams with a closed cell void-structure can be internally charged by silent or partial discharges within the voids. The resulting material, which carries positive and negative charges on the internal void surfaces is called a ferroelectret. Ferroelectrets behave like typical ferroelectrics, hence they provide a novel class of ferroic materials. The soft foams are strongly piezoelectric in the 3-direction, but show negligible piezoelectric response in the transverse direction. This, together with a very low pyroelectric coefficient, make ferroelectrets highly suitable for flexible electroactive transducer element which can be integrated in thin bendable organic electronic devices. Here we describe some fundamental characteristics of cellular ferroelectrets and present a number of promising examples for a possible combination with various functional polymer systems. Our examples focus on flexible ferroelectret field-effect transistor systems for large-area sensor skins and microphones, flexible large-array position detectors (touchpad), and stretchable large-array pressure sensors.

Author(s): Reinhard Schwödiauer and Ingrid Graz and Martin Kaltenbrunner and Christoph Keplinger and Petr Bartu and Gerda Buchberger and Christoph Ortwein and Siegfried Bauer
Book Title: Proceedings of the SPIE Vol. 6927
Pages: 69270Q 1-10
Year: 2008
Month: April
Department(s): Robotic Materials
Bibtex Type: Conference Paper (inproceedings)
Paper Type: Conference
DOI: 10.1117/12.779363
Address: San Diego, USA
State: Published

BibTex 

@inproceedings{Keplinger08-SSMNEHM-Ferroelectrets,
  title = {Cellular Ferroelectrets for Electroactive Polymer Hybrid Systems: Soft Matter Integrated Devices with Advanced Functionality},
  author = {Schw{\"o}diauer, Reinhard and Graz, Ingrid and Kaltenbrunner, Martin and Keplinger, Christoph and Bartu, Petr and Buchberger, Gerda and Ortwein, Christoph and Bauer, Siegfried},
  booktitle = {Proceedings of the SPIE Vol. 6927 },
  pages = {69270Q 1-10},
  address = {San Diego, USA},
  month = apr,
  year = {2008},
  doi = { 10.1117/12.779363},
  month_numeric = {4}
}