In three studies, scientists report designing their own molecular pumps and rotary motors that could eventually suck carbon dioxide from the air and harvest valuable metals from seawater.
Tiny molecular machines make life possible. Spinning rotary motors generate the chemical fuel our cells need, miniature walkers carry nutrients, and minute construction crews build proteins. Now, chemists are getting in on the act by making even smaller and simpler versions of these biological machines.
“These are very important steps toward useful real-life molecular machines,” says Ivan Aprahamian, a chemist at Dartmouth College who wasn’t involved with the studies. Fraser Stoddart has been working to overcome this challenge for years. The organic chemist at Northwestern University created some of the world’s first small, chemical-based molecular machines,for his research in 2016. His team designed rings that would thread on and off a molecular axle when different chemicals were added.
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