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Friday, 6th January 2006 (6863 views)

Canadian scientists have crafted a microscopic propeller using gold and nickel nanorods, the BBC reports.

The tiny devices, developed by researchers at the University of Toronto in Canada, are 500 times thinner than a strand of human hair.

Gold was attached to one end of the rods, while nickel was attached to the opposing end.

The rods began exhibiting a propeller-like motion when hydrogen peroxide was added to the solution in which they were contained.

The motion was triggered because gold does not react to hydrogen peroxide while nickel generates a reaction from the substance.

The contrast liberates gas bubbles, providing the thrust necessary to turn the nanorods at a constant pace.

The technique was reportedly discovered by accident and experts admit that the idea needs work before it can be applied to the real world.

Although critics say the limited movement they display means the propellers aren't true nano-machines, the technology certainly has potential, with rotary design used in engines, screws and clocks.

 

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