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- W3088797584 abstract "Non-conductive materials like rubbers, plastics, ceramics, and even semiconductors have the property of flexoelectricity, which means that they can generate electricity when bent and twisted. However, an irregular shape or a peculiar load has been the necessary condition to realize flexoelectricity, and the weight-specific ratios of flexoelectricity of solids are limited. Here, we report the ultrahigh flexoelectric response of porous polydimethylsiloxane (PDMS). The porous PDMS with 3D micron-scale interconnected structures exhibits two orders of magnitude higher weight-specific flexoelectric response than that of the solid truncated pyramid PDMS. Due to their diverse and irregular internal micro-structures, the porous materials can exhibit flexoelectricity under arbitrary loading forms. The flexoelectric signal was found linearly proportional to the applied strain, the microstructural size and the frequency, which makes the porous material promising for flexible, ultralight, sensitive and multi-functional passive sensor applications without external applied electric power. As one example of applications, we designed bending and shock absorption sensors, and demonstrated their stable and accurate responses. Our work highlights the new potential of porous structured materials with a significant flexoelectric effect in the fields of sensing, actuating, energy harvesting, and biomimetics as light-weight passive materials." @default.
- W3088797584 created "2020-10-01" @default.
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- W3088797584 date "2020-09-08" @default.
- W3088797584 modified "2023-09-27" @default.
- W3088797584 title "Ultrahigh flexoelectricity of 3D interconnected porous PDMS" @default.
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- W3088797584 hasPublicationYear "2020" @default.
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