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Nature 408, 151-154 (9 November 2000) | doi:10.1038/35041665

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Nanotechnology: In control of molecular motion

Ben L. Feringa

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Nature leads the way when it comes to motors on a molecular scale. But chemists are in hot pursuit, designing controllable structures that can mimic muscles or rotary motors.

If you could build a motor one millionth of a millimetre across, you could fit a billion billion of them on a teaspoon. It seems incredible, but biological systems already use molecular motors on this scale.