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Science 22 January 1999:
Vol. 283. no. 5401, pp. 512 - 514
DOI: 10.1126/science.283.5401.512
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Reports

Self-Oriented Regular Arrays of Carbon Nanotubes and Their Field Emission Properties

Shoushan Fan, Michael G. Chapline, Nathan R. Franklin, Thomas W. Tombler, Alan M. Cassell, Hongjie Dai *

The synthesis of massive arrays of monodispersed carbon nanotubes that are self-oriented on patterned porous silicon and plain silicon substrates is reported. The approach involves chemical vapor deposition, catalytic particle size control by substrate design, nanotube positioning by patterning, and nanotube self-assembly for orientation. The mechanisms of nanotube growth and self-orientation are elucidated. The well-ordered nanotubes can be used as electron field emission arrays. Scaling up of the synthesis process should be entirely compatible with the existing semiconductor processes, and should allow the development of nanotube devices integrated into silicon technology.

Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
*   To whom correspondence should be addressed. E-mail: hdai{at}chem.stanford.edu

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