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Light-controlled gearbox for nanomachines

Rewarded with a Nobel Prize in Chemistry in 2016, nanomachines provide mechanical work on the smallest of scales. Yet at such small dimensions, molecular motors can complete this work in only one direction. Researchers have succeeded in developing more complex molecular machines that can work in one direction and its opposite. The system can even be controlled precisely, in the same way as a gearbox.

(via WSJ)