Swiss researchers gain electricity from electromagnetic noise

We are almost permanently surrounded by electromagnetic noise. It is generated by mobile phones, WLAN routers, power lines or natural sources. In general, this noise is perceived as a useless disorder or sometimes even as a health hazard. A team from the University of Freiburg in Switzerland has now discovered a combination of materials that can be used to convert this noise very efficiently into electrical signals and currents, which in turn can supply battery -free electrical devices, light sources or mechanical drives.