OOC: Whoops about Metal. I'd rather not because of the weight. Carbon Nanofibre just happens to be the hardest material in the world. Harder than anything we've ever seen. I'll correct the statement.
No, you mean Graphene. How many times must I correct you?
It is:
The hardest.
One of the thinnest.
The most electrically conductive.
The most thermally conductive (I think).
Obviously EXTREMELY light, more so definitely than carbon nanofibre.[DOUBLEPOST=1377706663][/DOUBLEPOST]Fun fact: The limit of a graphene sheet's hardness is an average elephant sitting on a pencil