Cetvorotaktni nano-motor na solarnu energiju

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Minuscule Motor Runs on Sunlight
Scientists have developed tiny four-stroke engines that run on sunlight.

The nanomotors—so small that 3.8 million of them lined up end-to-end would barely span the width of a penny—generate absolutely no waste.

Each little motor is just 5 nanometers in length, macaroni-like in shape, and has a ringed structure at one end that moves back-and-forth like the pistons under your car’s hood.

Energy, in the form of photons from sunlight, excites one end of the molecule, which sets off a four-step process. Electrons are transferred along the molecule until they reach the ring structure, causing it to slide 1.3 nanometers forward on the molecule.

As the electron continues its path, it reaches a section that recycles it back to the beginning. This causes the molecule to “reset,” and the ring returns, piston-like, to its original position.

The whole process takes about 100 microseconds.

Izvor i ostatak vesti: http://www.livescience.com/technology/060123_solar_nanomotor.html

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