A look at carbon nanotubes and opto-electronics in chip design
 

Process node scaling is becoming very expensive

Carbon nanotubes have long been proposed as a significant substrate replacement to transform the chip design industry as we know it.

They can operate using substantially less electrical charge and are six to ten times faster than silicon, yet due to their incredibly small size they have proven difficult to work with.

http://fudzilla.com/news/processors/...in-chip-design