August 18, 2014
Researchers at Queen Mery University in London have teamed up with Nokia to build the first smartphone prototype that can be charged using only sound waves. University doctors Joe Briscoe and Steve Dunn were the first to get the idea, when they discovered that music significantly improved the functioning of solar cells.
Starting from there, the team was able to develop a nanogenerator capable of harvesting energy from ambient sound. The key to this generator was zinc oxide, which can create voltage when it expands and contracts. Using this material in the form of nanotubes, they managed to generate five watts of power, enough to charge a phone.
via They get a smartphone to load with ambient sound – tuexperto.com.
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