Now on the molecular scale: electric motors

https://news.northwestern.edu/stories/2023/01/now-on-the-molecular-scale-electric-motors/

"like in a macro motor, electrons drive a molecular motor... 2nm wide, produced en masse, easy to make, operates quickly and does not produce any waste products... catenane whose components ― a loop interlocked with two identical rings ― are redox active undergoing unidirectional motion in response to changes in voltage potential... electric molecular motor could team up with biomolecular motors in the human body... could drive innovations in materials science and medicine"

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