Berlin 2008 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 5: New Materials
CPP 5.3: Vortrag
Montag, 25. Februar 2008, 10:30–10:45, C 230
PbTiO3/P(VDF-TrFE) nanocomposites for flexible skin — •Markus Krause1, Norbert Gaar1, Reinhard Schwödiauer1, Simona Bauer-Gogonea1, Siegfried Bauer1, Bernd Ploss2, Ingrid Graz3, Stephanie P. Lacour3, Martin Zirkl4, Barbara Stadlober4, Jian-Zhang Chen5, and Sigurd Wagner5 — 1Soft Matter Physics, Johannes Kepler University, Linz, Austria — 2SciTec, University of Applied Sciences, Jena, Germany — 3Nanoscience Centre, University of Cambridge, U.K — 4Institute of Nanostructured Materials and Photonics, Joanneum Research, Weiz, Austria — 5Department of Electrical Engineering, Princeton University, Princeton NJ, USA
Flexible electronics is often inspired by nature, for example by the feasibility of skin to sense touch and temperature changes. Mimicking such features of living systems is a challenge in macroelectronics research. Here we show that composites of ferroelectric ceramics and copolymers can be tailored to exhibit exclusively piezoelectric or pyroelectric responses depending on the poling procedure applied. They are therefore suitable for the development of smart skin applications.
0-3 composites of 70/30 P(VDF-TrFE) and 30% PbTiO3 nanopowder inclusions have been prepared and polarized to exhibit either piezo- or pyroelectric functionalities. Such elements on a single foil have been combined with flexible electronic components based on amorphous silicon and organic field-effect transistors. The generated signals are used to alter the conductance of the drain-source channel of the field effect transistors, and enable the demonstration of pressure and temperature sensors, by way of design. Work partially supported by the FWF.