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Science 9 November 2001:
Vol. 294. no. 5545, pp. 1313 - 1317
DOI: 10.1126/science.1066192
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Reports

Logic Gates and Computation from Assembled Nanowire Building Blocks

Yu Huang,1* Xiangfeng Duan,1* Yi Cui,1 Lincoln J. Lauhon,1 Kyoung-Ha Kim,2 Charles M. Lieber12dagger

Miniaturization in electronics through improvements in established "top-down" fabrication techniques is approaching the point where fundamental issues are expected to limit the dramatic increases in computing seen over the past several decades. Here we report a "bottom-up" approach in which functional device elements and element arrays have been assembled from solution through the use of electronically well-defined semiconductor nanowire building blocks. We show that crossed nanowire p-n junctions and junction arrays can be assembled in over 95% yield with controllable electrical characteristics, and in addition, that these junctions can be used to create integrated nanoscale field-effect transistor arrays with nanowires as both the conducting channel and gate electrode. Nanowire junction arrays have been configured as key OR, AND, and NOR logic-gate structures with substantial gain and have been used to implement basic computation.

1 Department of Chemistry and Chemical Biology,
2 Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
*   These authors contributed equally to this work.

dagger    To whom correspondence should be addressed. E-mail: cml{at}cmliris.harvard.edu

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