The graphene coating, seen above as a dark blue patch connected to gold contacts, generated 85 nanowatts of power (Image: Rensselaer/Koratkar)
Hydroelectricity is the most widely used form of renewable energy, supplying around 20 percent of the world’s electricity in 2006, which accounted for about 88 percent of electricity from renewable sources. Now researchers at the Rensselaer Polytechnic Institute have developed a new method to harvest energy from flowing water using a nanoengineered graphene coating. The new technology only produces small amounts of electricity so isn’t aimed at large scale electricity production, but rather at self-powered microsensors to be used in oil exploration.
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