Artificial 'beaks' to produce water from fog

Inspired by a bird's beak, scientists have developed a novel and highly efficient device to collect water from fog.
From the most parched areas of Saudi Arabia to water-scarce areas of the western US, the idea of harvesting fog for water is catching on, researchers said.
Now, a novel approach to this process could help meet affected communities' needs for the life-essential resource.
Researcher Cheng Luo and his doctoral student, Xin Heng, from the University of Texas at Arlington explained that deserts and semi-arid areas cover about half of the Earth's land masses.
In some of these places, trucks bring in potable water for the people who live there. To find a more sustainable way to get water, these communities, which can't draw water from underground or surface supplies, have turned to the air - and to nature for inspiration.

They implement methods adapted from those that desert beetles, cacti and grasses use to catch water from the misty fog when it rolls in.

But existing techniques require complicated, costly processes or collect only a small fraction of the water that fog has to offer. For new ideas, Luo's team turned to shorebirds with long, thin beaks.
By opening and closing their beaks, shorebirds drive food-containing liquid drops into their throats.
The researchers mimicked this phenomenon by building simple, fog-collecting, rectangular "beaks" out of glass plates connected by a hinge on one side.
When open, the plates provide a large surface area where beads of fog condense. When the plates close, then re-open, the droplets slide towards the hinge and into a collection tube.

A single 10-inch by 4-inch prototype "swallowed" about a tablespoon of water in 36 minutes. Over two hours, it harvested 400 to 900 times more water than both natural and other artificial fog-collectors.
The research was published in the American Chemical Society (ACS)'s journal Applied Materials & Interfaces.