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High dielectric constant polymer nano-composites actuator materials

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5 Author(s)
C. Huang ; Dept. of Electr. Eng. & Mater. Res. Inst., Pennsylvania State Univ., University Park, PA, USA ; K. Ren ; S. Zhang ; F. Xia
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Charge transport plays very important role in many electronic materials. Recently, making use of the delocalized electrons in conjugated π-electrons in organics, several all-polymer composites have been developed which exhibited dielectric constant higher than 1,000 and high electromechanical responses with much reduced electric field (for example, 14% strain induced under 25 MV/m with an elastic energy density of 0.85 J/cm3). This talk will discuss these developments, including the significant enhancement of the dielectric and electromechanical responses in these composites when the inclusion size is reduced from sub-microns to nanometers. The interfacial polarization exchange effect and local field fluctuations in these nano-composites play very important role in enhancing the dielectric and electromechanical responses.

Published in:

2005 12th International Symposium on Electrets

Date of Conference:

11-14 Sept. 2005