Re: Single-Layer Carbon (Graphene) *** Created

From: jbuch (jbuch_at_CUTHERErevealed.net)
Date: 10/22/04 

Date: Fri, 22 Oct 2004 16:08:33 -0500

As soon as I saw this, I said "Sanman is going to ask some dumb question
about the whole subject."

And, he did.

JIm

sanman wrote:
> http://www.physorg.com/news1667.html
>
> How come it's taken so long to make the single-layer graphene ***? 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 ***.
>
> 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 ***-reinforced
> composite material? 

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