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- W2901710133 abstract "Because of the flexoelectric effect, dielectric materials usually polarize in response to a strain gradient. Soft materials are good candidates for developing large strain gradient because of their good deformability. However, they always suffer from lower flexoelectric coefficients compared to ceramics. In this work, a flexoelectric-like effect is introduced to enhance the effective flexoelectricity of a polydimethylsiloxane (PDMS) bar. The flexoelectric-like effect is realized by depositing a layer of net charges on the middle plane of the bar to form an electret. Experiments show that the enhancement of the flexoelectricity depends on the density of inserted net charges. It is found that a charged layer with surface potential of -5723V results in 100 times increase of the material's flexoelectric coefficient. We also show that the enhancement is proportional to the thickness of electrets. This work provides a new way of enhancing flexoelectricity in soft materials and further prompt the application of soft materials in electromechanical transducers." @default.
- W2901710133 created "2018-11-29" @default.
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- W2901710133 date "2019-04-12" @default.
- W2901710133 modified "2023-10-16" @default.
- W2901710133 title "Flexoelectret: An Electret with a Tunable Flexoelectriclike Response" @default.
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- W2901710133 doi "https://doi.org/10.1103/physrevlett.122.148001" @default.
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