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Science 24 March 2006:
Vol. 311. no. 5768, p. 1735
DOI: 10.1126/science.1122797
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Brevia

An Integrated Logic Circuit Assembled on a Single Carbon Nanotube

Zhihong Chen,1 Joerg Appenzeller,1* Yu-Ming Lin,1 Jennifer Sippel-Oakley,2 Andrew G. Rinzler,2 Jinyao Tang,3 Shalom J. Wind,4 Paul M. Solomon,1 Phaedon Avouris1*

Single-walled carbon nanotubes (SWCNTs) have been shown to exhibit excellent electrical properties, such as ballistic transport over several hundred nanometers at room temperature. Field-effect transistors (FETs) made from individual tubes show dc performance specifications rivaling those of state-of-the-art silicon devices. An important next step is the fabrication of integrated circuits on SWCNTs to study the high-frequency ac capabilities of SWCNTs. We built a five-stage ring oscillator that comprises, in total, 12 FETs side by side along the length of an individual carbon nanotube. A complementary metal-oxide semiconductor-type architecture was achieved by adjusting the gate work functions of the individual p-type and n-type FETs used.

1 IBM Thomas J. Watson Research Center, Yorktown Heights, NY 10598, USA.
2 Department of Physics, University of Florida, Gainesville, FL 32611, USA.
3 Department of Chemistry, Columbia University, New York, NY 10027, USA.
4 Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10027, USA.

* To whom correspondence should be addressed. E-mail: joerga{at}us.ibm.com (J.A.); avouris{at}us.ibm.com (P.A.)

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Science. ISSN 0036-8075 (print), 1095-9203 (online)