November 3, 2008
Nano brushes generate power
Make microscopic interconnecting brushes
of the right materials and you can turn vibrations into electricity.
The nanoscale piezoelectric generator consists of vertical
zinc oxide nanowires and pyramid-shaped metal-coated zinc oxide tips.
Arrays of the nanowires face arrays of the tips, with the ends of
the nanowires inserted among the tips. Vibrations cause the tips to
bend the nanowires, which produces tiny but potentially useful amounts
A double layer of the nanogenerator produces 0.11 microwatts
per square centimeter.
The nanogenerator could be used to harvest electricity from
shoes, car engines, tires and other vibrations sources.
Multilayer Nanogenerator Fabricated Using Paired Nanotip-to-Nanowire
Nano Letters, published online October 22, 2008
Zhong Lin (ZL)
Wang's Nanoscience and Nanotechnology group
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