Graphene has not been out of the news since its discovery and especially since it became a physics Nobel chemical. Now, a nanoscopic trampoline comprising a single graphene sheet suspended between two electrodes has been shown to pick up radio signals. The device might be useful in the next generation of radio devices. Researchers have been hoping to exploit nanoelectromechanical resonators to filter and generate radio signals directly for some time. The new graphene device side-steps the problem of parasitic capacitance seen with other resonators and so ensures the signals are not drowned out at radio frequencies. Graphene can resonate at Gigahertz frequencies, which is the part of the spectrum of most interest to mobile phone manufacturers and those making other radio-frequency communications devices.
Radio free graphene