How scientists turned humid air into renewable energy by accident

The nanowires were bumping around inside the tube resulting in a small charge, and as the frequency of bumps rose, one end of the tube became differently charged from the other.

“So it’s really like a battery,” explained Yao. “You have a positive pull and a negative pull, and when you connect them the charge is going to flow.”

Yao’s team conducted a new study that saw their experiments move on from nanowires, and instead use materials with millions of tiny holes, or nanopores. The result is a device the size of a thumbnail that can generate roughly one microwatt.

“The beauty is that the air is everywhere,” added Yao. “Even though a thin sheet of the device gives out a very tiny amount of electricity or power, in principle, we can stack multiple layers in vertical space to increase the power.”

A miracle in action

Now, other scientists are saying that these devices do have the potential of producing the miracle of generating electricity from thin air. Peter Dobson, emeritus professor of engineering science at Oxford University, told The Guardianthe experiments are proving fruitful.

“When I first heard about it, I thought: ‘Oh yes, another one of those.’ But no, it’s got legs, this one has,” said Dobson. “If you can engineer and scale it, and avoid the thing getting contaminated by atmospheric microbes, it should work.”

Others however say we still have a long way to go before these types of devices are powering our homes.

“How do these devices get manufactured?” told The GuardianAnna Korre, professor of environmental engineering at Imperial College London. “Sourcing raw materials, costing, assessing the environmental footprint, and scaling them up for implementation takes time and conviction.”

But this hasn’t stopped Yao from dreaming big.

“Lots of energy is stored in water molecules in the air,” he concluded to The Guardian.“That’s where we get the lightning effect during a thunderstorm. The existence of this type of energy isn’t in doubt. It’s about how we collect it.”

Will they manage to collect it efficiently enough to prove fruitful? Only time will tell.