Graphene Aerogel Takes World's Lightest Material Crown

cylonlover writes "Not even a year after it claimed the title of the world's lightest material, aerographite has been knocked off its crown by a new aerogel made from graphene. Created by a research team from China's Zhejiang University in the Department of Polymer Science and Engineering lab headed by Professor Gao Chao, the ultra-light aerogel has a density of just 0.16 mg/cm3, which is lower than that of helium and just twice that of hydrogen."

Comments

Molecular Sieve?

[Mente]

If the substance's density could be altered, it would be possible to have one membrane of gel that was more dense than helium and hydrogen, but less dense than every other element. Then have this gel, which is less dense than helium and more dense than hydrogen. Helium and Hydrogen would flow through the first membrane leaving everything else behind, and then only Hydrogen would pass though the second membrane leaving only helium trapped in between. Given the state of the world's current Helium reserves, this might be a very handy technology.