MIT engineers say they’ve found a way to generate electricity just by drawing on the water vapor in the air.
They’ve created a new polymer film that changes its shape after absorbing tiny amounts of evaporated water, allowing it to repeatedly curl up and down.
There’s enough energy produced, says the team, to drive robotic limbs or power devices such as environmental sensors. Potential applications include large-scale, water-vapor-powered generators, or smaller generators to power wearable electronics.
via TGDaily
