Carbon nanotube array and method for making same

Details Carbon nanotube array and method for making same Carbon nanotube array and method for making same

2007-01-09

2007-01-09

Hendrickson, Stuart L. (Department: 1754)

Electric lamp and discharge devices

Discharge devices having an electrode of particular material

C423S447200, C423S447300, C977S742000, C977S850000, C313S34600R

Reexamination Certificate

active

10640340

ABSTRACT:
A carbon nanotube-based device (40) includes a substrate (10), a number of catalytic nano-sized particles (131) formed on the substrate, and an aligned carbon nanotube array (15) extending from the alloy catalytic nano-sized particles. The aligned carbon nanotube array progressively bends in a predetermined direction. A method for making the carbon nanotube-based device includes the steps of: providing a substrate; depositing a layer of catalyst on the substrate; depositing a layer of catalyst dopant material on the catalyst layer, for varying a reaction rate of synthesis of the aligned carbon nanotube array; annealing the catalyst and the catalyst dopant material in an oxygen-containing gas at a low temperature; and exposing the nano-sized particles and catalyst dopant material to a carbon-containing source gas at a predetermined temperature such that the aligned carbon nanotube array grows from the substrate.

REFERENCES:
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patent: 6232706 (2001-05-01), Dai et al.
Yao, B. D. and Wang, N., “Carbon Nanotube Arrays Prepared by MWCVD,” 2001, American Chemical Society, Journal of Physical Chemistry, 105, pp. 11395-11398.
Fan S. S. et al. “Self-oriented Regular of Carbon Nanotubes and Their Field Emission Properties” Science, Jan. 22, 1999, vol. 283, pp. 512-514.
B. Q. Wei et al. “Organized Assembly of Carbon nanotubes” Nature Apr. 4, 2002, vol. 216, pp. 495-496.
Yue-gang Zhang et al. “Electric-field-directed Growth of Aligned Single-walled carbon nanotubes” Applied Physics Letters, Nov. 5, 2001, vol. 79, No. 19.

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