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Electrical device plugs directly into trees for power

December 9, 2012
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Source: Mother Nature Network

Researchers have discovered that there’s enough power in living trees to run an electric circuit.

Electricity from tree

In today’s world of high-tech portable gadgets, iPods and cell phones, we’ve become dependent upon readily accessible electric outlets to power our devices and charge our batteries. But now researchers at the University of Washington have discovered nature’s alternative to the power outlet: living trees.

That’s right, living trees. UW engineers Babak Parviz and Brian Otis have invented an electrical device that can be plugged directly into any tree for power. “As far as we know this is the first peer-reviewed paper of someone powering something entirely by sticking electrodes into a tree,” said Parviz.

The research was based upon a breakthrough study last year out of MIT, when scientists found that plants generate a voltage of up to 200 millivolts when one electrode is placed in a plant and the other in the surrounding soil. Those researchers are already designing devices which act as forest sensors powered entirely by this new method. But until now, no one has applied these findings to the development of tree power.

It all began last summer with UW undergraduate student Carlton Himes (also the study’s co-author). He spent his summer wandering around the woods surrounding campus, hooking nails to bigleaf maple trees and connecting them to his voltmeter. Sure enough, the trees registered a steady voltage of up to a few hundred millivolts.

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