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Scientists Capture the Energy of Evaporation to Drive Tiny Engines

By Richard Martin

Harnessing the power from a fundamental process that’s happening constantly, all over the world, a team of scientists at Columbia University have devised tiny engines powered by evaporation. The devices generate electricity from the energy produced by bacterial spores known as Bacillus subtilis, which exhibit strong mechanical responses to changing relative humidity.

Read more on technologyreview.com.

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