Over the last three years, we’ve seen a lot of impressive demonstrations of what the material graphene (a single-atom wide sheet of carbon with the atoms spread in an hexagonal mesh) can do. However, according to IBM, graphene does not have an energy gap, which means that graphene transistors can’t be “switched on and off”, and thus that they are unsuitable for use inside of microprocessors.
It doesn’t matter anyway. All they have to do is to take their graphene sheet, cut and fold it the right way, and they can make some varieties of carbon nanotubes which do have an energy gap
Edited 2011-01-25 20:00 UTC