4 ms·
>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
by kken 12y ago
>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 12y agoThe problem with having none is that makes your transistors even more vulnerable to quantum effects.
- typon 12y agoThat's not the main problem. The main problem of not having a bandgap is that you don't have a transistor...
- kken 12y agoSshhh.. 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 12y agoBut 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