Single-Layer Carbon (Graphene) Sheet Created
sanman
How come it's taken so long to make the single-layer graphene sheet? I
thought that's what pencil leads are made from, and they're pretty
flimsy. I assume that those are made of teeny little shreds of
graphene, as opposed to a big flawless sheet.
Wouldn't it be rather straightforward to make single-layer graphene
sheets using Chemical Vapor Deposition?? It works for nanotubes,
doesn't it? Intuitively, it would seem that any method used to make
nanotubes could be adapted to make the planar sheets.
Which would have greater tensile strength -- carbon nanotubes or
graphene sheets?
When you consider that one of the problems in exploiting the
mechanical strength of nanotubes is due to them always slipping apart
from each other or surrounding material, it would seem that the
nanosheets have one less axis of slippage to worry about. Furthermore,
the area of contact between adjacent sheets or with surrounding matrix
material would be greater, for Van der Waals attraction purposes.
Which should be stronger -- a panel made of nanotube-reinforced
composite material, or one made of a graphene sheet-reinforced
composite material?
jbuch
about the whole subject."
And, he did.
JIm
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sanman
> As soon as I saw this, I said "Sanman is going to ask some dumb question
> about the whole subject."
>
> And, he did.
>
> JIm
Hey, somebody has to ;P
But don't you think this could be as important as the nanotube?
After all, sheets should be easier to work with than tubes, shouldn't
they?
They'll slip and slide less than tubes would. They could also make an
incredibly strong single-ply toilet paper, which nothing would stick
to.
I remember reading a sci-fi story about nanotubes, where these
assassins would string a superstrong superthin nanotube wire across a
doorway, and when someone walked through it their head got lopped off.
I'd imagine that with the graphene sheet, it could be so slippery that
you could lay it on the floor and who ever stepped on it would slip
and fall. Maybe it could be used to foul up tank treads perhaps?
What about a graphite skating rink? You could still use it in the
middle of summer.
What about making a superstrong parachute or drag chute from the
graphene sheet?
Or a blanket that could be placed on top of explosives to absorb the
blast in case of accidental detonation?
How about a truly comfortable spacesuit, instead of one that makes you
look like the Staypuff Marshmallow Man.
How about superstrong armor plating or bulletproof vests?
Graphene sheets could be used to create a new class of nano-laminate
materials.
Any other suggestions on applications?
sanman
Should it soon be possible to make similar single-atom sheets from BN,
based on its similarity to carbon? If the graphene sheet is based on
extraction from graphite crystal, then why can't BN sheets similarly
be extracted from BN crystal?
Aerospace engineers say it's better for a re-entry craft to have a
heat shield that's ablative. Wouldn't a paint coating containing BN
nano-sheet flakes then offer the best properties for ablation from
atmospheric re-entry?
The polar nature of the BN units should also decrease slippage,
especially between adjacent BN sheets.
Also, if nanotubes can be functionalized, so should graphene and BN
nano-sheets. This should then truly reduce slippage.
Comments?
Uncle Al
>
> jbuch <jb...@CUTHERErevealed.net> wrote in message news:<clbsp...@enews1.newsguy.com>...
> > As soon as I saw this, I said "Sanman is going to ask some dumb question
> > about the whole subject."
> >
> > And, he did.
> >
> > JIm
>
> Hey, somebody has to ;P
>
> But don't you think this could be as important as the nanotube?
>
> After all, sheets should be easier to work with than tubes, shouldn't
> they?
> They'll slip and slide less than tubes would. They could also make an
> incredibly strong single-ply toilet paper, which nothing would stick
> to.
You are in management, right? You are not internally self-consistent;
you aren't connected to empirical reality either. (Special
dispensation if you are a Muslim and are culturally incapable of
comprehending the mechanism or purpose of toilet paper.)
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf