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Nanogenerators produce electricity by squeezing your fingers together, while you dance
It's been a while since we last heard about nanogenerators -- you know, those insanely tiny fibers that could potentially be woven into your hoodie to juice up your smartphone. Dr. Zhong Lin Wang of the Georgia Institute of Technology has reported that he and his team of Einsteins constructed nanogenerators with enough energy to potentially power LCDs, LEDs and laser diodes by moving your various limbs. These micro-powerhouses -- strands of piezoelectric zinc oxide, 1 / 500 the width of a single hair strand -- can generate electrical charges when flexed or strained. Wang and his team of researchers shoved a collection of their nanogenerators into a chip 1 / 4 the size of a stamp, stacked five of them on top of one another and can pinch the stack between their fingers to generate the output of two standard AA batteries -- around 3 volts. Although it's not much, we're super excited at this point in development -- imagine how convenient to charge your phone in your pocket sans the bulky battery add-ons. And that's only one application of this technology. Yea, we know.
Motion-sensitive "power skins" could generate power in space
Just in case you ever plan on heading up into space to see your soon-to-be-painted logo on the Y*N*I*S satellite up close and personal, you might be interested in this. Devised by researchers at a Cambridge-based venture, dubbed IntAct Labs, the motion-sensitive "power skin" could be used and worn by humans and inanimate objects alike in order to generate electricity, and the concept was derived from our very ears. After investigating how biological organisms are such "ultra-efficient generators of power," the crew homed in on a tiny protein called prestin, which can "convert electrical voltage into motion or produce electrical charges in response to mechanical stresses," and is actually found in the outer hair cells of the human ear. Ideally, networks of these proteins would be linked in order to form skins that could coat people or objects and generate energy from something as simple as walking around or being in the path of wind gusts, and if everything pans out, a prestin-powered research station could be set up on Mars without a manmade perpetual power source in tow.[Thanks, Sparky]
