David Carroll, a professor at Wake Forest University in the United States, invented a new type of fabric called "Power Felt" that converts body heat into electricity and charges the cell phone. This fabric is a versatile hand that, in addition to charging the phone, can also charge the radio or flashlight, and can play an important role after a power failure.
University graduate student Cowle Hewitt of the University of Wacker in the United States holds a Power Felt sample with tweezers
Carol and his research team use nanometers to turn tiny carbon molecules into plastic fibers, which are then woven into fabrics. Carol explained the working mechanism of this material: "If you grasp the end of a metal rod, the heat in your hand will heat up the electrons. As the temperature rises, the electrons look for a lower temperature area and move to the metal rod. At the other end, there is an extra electron at one end, and a voltage is formed between the two ends, which is the thermal voltage. Power generation fabrics use this principle of operation."
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