ABSTRACT
Since Iijima first reported the formation of needle-like tubular carbon structures in the early 1990s, the research on carbon-based electronics, driven by some ground-breaking discoveries and pioneering processing techniques, has advanced a long way [1-6]. Recently, there has been demonstration of a first computer built entirely using carbon nanotube (CNT)-based transistors [6]. The allotropic forms of carbon such as CNT and graphene possess unique physical properties and exhibit outstanding carrier mobilities. These properties of CNT and graphene, coupled with small geometric size, provide opportunities to be exploited in field-effect transistors (FETs). It is predicted that the transistors fabricated using CNTs can outperform silicon-based FETs in terms of energy efficiency by more than an order of magnitude [6]. As a result, researchers are actively exploring the possibility of employing CNT and graphene in mainstream CMOS technology and are making important breakthroughs.
