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Washington, Nov 19 (TruthDive): Scientists claim to have created the world’s lightest solid material so light that even a feathery dandelion can comfortably hold its weight without having its little fluffy seeds mashed.
A team of researchers from UC Irvine, HRL Laboratories and the California Institute of Technology have developed the material with a density of 0.9 mg/cc.
The substance is made of tiny hollow metallic tubes – the walls of which are 1,000 times thinner than those of a human hair – arranged into a criss-crossing diagonal pattern with small open spaces between them. It has a unique “micro-lattice” cellular architecture.
The secret to its lightness is a cellular architecture fabricated from hollow tubes that supports a material structure that is in reality 99.99 per cent air, according to the research team that built it.
That means the material’s density is less than one-thousandth that of water. And the stuff is pretty resilient as well—researchers said that when squashed to half its height, the material rebounds 98 per cent of the way back.
“The trick is to fabricate a lattice of interconnected hollow tubes with a wall thickness 1,000 times thinner than a human hair,” lead author Tobias Shandler of HRL said.
Bill Carter, manager of the architected materials group at HRL, said that to understand the structure of the material, it can be compared with either the Eiffel Tower in Paris or the Golden Gate Bridge over San Francisco Bay. Like each of them, the material is light and weight-efficient, but on a Nano scale.
The material seen in the picture above is made out of 90 percent nickel. According to Carter, however, it can be made out of other metals as well — the nickel version was just the easiest to make, the report stated.
The first time the stress test was carried out and repeated the material became less stiff and strong, but the team says that further compressions made very little difference.
“Materials actually get stronger as the dimensions are reduced to the nanoscale,” said team member Lorenzo Valdevit.
According to the scientists, the material, extraordinarily strong and shock-absorbent, is like a feather. It floats down, and its terminal velocity depends on the density. When dropped from shoulder height, it takes more than 10 seconds to touch the ground.
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