Graphene FETs are analog only. They can't be completely turned off like Si FETs. The drain current can only be modulated, so you can't make traditional digital

Graphene FETs are analog only. They can't be completely turned off like Si FETs. The drain current can only be modulated, so you can't make traditional digital circuits from them. Researchers are primarily investigating them for use in really high frequency communication circuits, among other niche applications. Don't expect a carbon Pentium any time soon.