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    soft elastomers tagged posts

    The Powerhouse Future is Flexoelectric

    June 4, 2021, Categories  Health/Medical, Physics, Technology/Electronics

    pacemaker
    Pacemakers implanted in human hearts and utilizing lithium batteries could instead be self-powered as natural movement generates electrical power.

    ‘Giant flexoelectricity’ breakthrough in soft elastomers paves way for improved robots and self-powered pacemakers. Researchers have demonstrated “giant flexoelectricity” in soft elastomers that could improve robot movement range and make self-powered pacemakers a real possibility. In a paper published this month in the Proceedings of the National Academy of Sciences, scientists from the University of Houston and Air Force Research Laboratory explain how to engineer ostensibly ordinary substances like silicone rubber into an electric powerhouse.

    What do the following have in common: a self-powered implanted medical device, a soft human-li...

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    Tunable Windows for Privacy, Camouflage

    March 14, 2016, Categories  Physics, Technology/Electronics

    (a) Schematic cross-sectional diagram of the device. In the absence of an electric field, the surfaces are relatively smooth, and light passes through without being scattered or refracted. (b) When connected to a high-voltage source, the nanowires locally compress the elastomer, deforming its surface. Since the nanowires are randomly oriented, the resulting deformation diffuses light passing through the device. (c–f) Changes of opacity at the indicated actuation voltage from 0 to 2.2 kV, demonstrating control over the in-line transmittance using electrical potential. The logo and text are located 15 cm behind the circular film. The black rectangles are electrical contacts to the two sides of nanowire electrodes.

    (a) Schematic cross-sectional diagram of the device. In the absence of an electric field, the surfaces are relatively smooth, and light passes through without being scattered or refracted. (b) When connected to a high-voltage source, the nanowires locally compress the elastomer, deforming its surface. Since the nanowires are randomly oriented, the resulting deformation diffuses light passing through the device. (c–f) Changes of opacity at the indicated actuation voltage from 0 to 2.2 kV, demonstrating control over the in-line transmittance using electrical potential. The logo and text are located 15 cm behind the circular film. The black rectangles are electrical contacts to the two sides of nanowire electrodes.

    Method turns glass from clear to opaque with the flick of a switch...

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