Scientists create paper-thin device that turns flags into loudspeakers

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Scientists at Michigan State University (MSU) have created a paper-thin, flexible device that, when integrated, can turn a flag into a loudspeaker by generating energy from human movement. The ferroelectret nanogenerator known as FENG debuted in late 2016, when its creators demonstrated its abilities by using it to power a keyboard, LED light and an LCD touchscreen. The process of creating the FENG starts with a silicone wafer, which is fabricated with several thin sheets of environmentally friendly substances such as silver, polyimide and polypropylene ferroelectret. Ions are added so that each layer in the device contains charged particles. Electrical…

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