[kken]

>The problem is with carbon in general is it has a band gap

The band gap is not a function of the element alone, but mainly of the crystal structure. Different allotropes of carbon have vastly different band structures.

Diamond has a high band gap, as you mentioned. But Graphene has none, and that is one of the major obstacles of the material.

[valarauca1]

The problem with having none is that makes your transistors even more vulnerable to quantum effects.

[typon]

That's not the main problem. The main problem of not having a bandgap is that you don't have a transistor...

[kken]

Sshhh.. It's not allowed to talk in that way about the graphene "transistor". You may upset certain funding sources.

But you know, it is really fast! Just almost useless transconductance and no off state, but we can fix it later!

[typon]

But bilayer graphene has an induced bandgap!! What? The mobility goes to shit as soon as you touch it with a substrate? Well that's not a problem, we'll design vacuum suspended GFETs, but I'll get right back to you when I figure out how to put an oxide around that sucker