Next renewable energy could be the conversation: two Korean researchers have discovered how to produce electricity 'from the sound. The discovery, related to nanotechnology could lead to phones that are recharged while speaking. The device is described by the Advanced Materials based on a nanomaterial obtained from zinc oxide. When a layer of material placed between two electrodes is hit by a sound of 100 decibels, which produces 50 millivolts of energy.
source: loop
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