rafal.smigrodzki at gmail.com
Thu Jul 26 16:34:56 UTC 2012
A question for the mathematically proficient people: If you made a
sphere of aerographite, covered with a gas non-permeable membrane, for
example a few layers of graphene, and partially evacuated the inside,
would it float in the air without being crushed by its pressure?
See here, aerographite weighs about 0.3 g per liter, and is pretty stiff:
air is about 1.3 g/l, so you would need to remove about one gram of
air from a 1-liter sphere of aerographite to achieve neutral buoyancy
- but what would be the pressure on the surface of the sphere? Assume
you are not using a lighter-than air gas inside.
Atomically precise macroscopic carbon structures could be truly amazing.
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