10 Atoms! Think about it. Nano sized.
Scientists at the University of Manchester have made this amazing breakthrough using graphene, a material that is essentially a single layer of carbon atoms. Although transistor size has been decreasing on a regular basis ever since their invention, in recent times, that speed has slowed down due to the breakdown in electrical properties at the nanoscale level.
We may not see graphene-based chips for another 15 or 20 years, but it is one possibility to replace silicon as it reaches its limits.