IBM researchers have created carbon nanotube field-effect transistors (CNFETs) that suggest that CNFETs may be competitive with Silicon MOSFETs for future nanoelectronic applications.
CNFETs deliver more than twice the amount of electrical current at a faster rate than silicon transistors. Increased current can lead to faster transistors and integrated circuits, so carbon may become a building block of computing in the future.

“Vertical scaling of carbon nanotube field-effect transistors using top gate electrodes,” Applied Physics Letters–May 27, 2002
Volume 80, Issue 21, pp. 3883-4065