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15 Oct 2012

Volume 101, Issue 16, Articles (16xxxx)

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Appl. Phys. Lett. 101, 161105 (2012); http://dx.doi.org/10.1063/1.4744947 (4 pages)

Nan Niu, Tsung-Li Liu, Igor Aharonovich, Kasey J. Russell, Alexander Woolf, Thomas C. Sadler, Haitham A. R. El-Ella, Menno J. Kappers, Rachel A. Oliver, and Evelyn L. Hu
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Advances for dielectric elastomer generators: Replacement of high voltage supply by electret

C. Jean-Mistral, T. Vu Cong, and A. Sylvestre

Appl. Phys. Lett. 101, 162901 (2012); http://dx.doi.org/10.1063/1.4761949 (5 pages) | Cited 1 time

Online Publication Date: 19 October 2012

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Dielectric generators require an external circuit with a high bias voltage source to polarize them. To drastically reduce this circuit and to avoid external polarization, we propose here original transducers combining electrets and dielectric elastomer. Two operating modes have been studied and electromechanical analytical models have been developed from the combination of electrets theory and dielectric model. These concepts are applied on e-textile application: scavenging energy during human motion. An energy density around 6 mJ g−1 is expected on an optimal load of 10 MΩ. More generally, the flexibility, the lightness, the absence of high-voltage supply open many fields of applications beyond e-textiles.
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85.50.-n Dielectric, ferroelectric, and piezoelectric devices
07.07.Mp Transducers
77.84.Cg PZT ceramics and other titanates
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