Add that magical material called graphene to the list of factors you can also make with inkjet printers alongside OLEDs , solar panels , and lightweight-bending metamaterials . Scientists on the Seoul National University used printers and a way called vapor deposition to go away a skinny film of the graphite-based conductor on sheets of PVDF (poly vinylidene fluoride). By sandwiching the the PVDF between graphene electrodes and applying a current from a legitimate source researchers were ready to create a flat and transparent loudspeaker which may be integrated into windows or screens. Don’t expect this low-power sound source to exchange your hi-fi though — because it will depend on the distortion-prone piezoelectric effect, it probably won’t sound significantly better than the earpiece to your cellphone.
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