A transparent material that can be attached to a smartphone's touch screen could help the device generate electricity whenever anyone taps it, researchers in China say.
Touch screens are now found on most cell phones and tablet computers. Using a touch screentypically involves finger taps, and scientists at Lanzhou University in China reasoned that the mechanical energy from these motions could be converted into electricity to charge the phone's batteries, which could significantly extend the working time of these portable devices.