According to scientists, deserts occupy about a fifth of the land. The main problem of a person who finds himself in the desert is the lack of water. Life wells and oases are a rarity, and not everyone can find and get to them. But as it turned out, water in the desert can be extracted from the air, because even the driest and hottest air contains moisture. The whole question is how to extract it from there.
A group of researchers at Rice University proposed using specially designed nanotubes for this. This original idea was prompted by the Stenocara beetle, which demonstrates miracles of survival in the desert. The beetle uses its wings as a moisture trap, with the help of which it absorbs water particles from the morning fog. The accumulated reserves are enough for him for a day. The next morning, everything is repeated.
The researchers decided to reproduce a unique natural mechanism using an array of nanotubes. The upper part absorbs water, and the lower part repels it. Thus, the water is, as it were, trapped, after which it remains to extract it, while not spending any energy.
Considering the microscopic size of nanotubes, it is not difficult to guess that a lot of them will be required to obtain the required amount of water. When all the technical problems are solved, nano-circles will appear, with which no desert is afraid.