Method for fabricating carbon nanotube yarn

Details Method for fabricating carbon nanotube yarn Method for fabricating carbon nanotube yarn

2006-05-16

2006-05-16

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

C423S447100, C423S447300, C428S367000, C977S726000

Reexamination Certificate

active

07045108

ABSTRACT:
A method of fabricating a long carbon nanotube yarn includes the following steps: (1) providing a flat and smooth substrate; (2) depositing a catalyst on the substrate; (3) positioning the substrate with the catalyst in a furnace; (4) heating the furnace to a predetermined temperature; (5) supplying a mixture of carbon containing gas and protecting gas into the furnace; (6) controlling a difference between the local temperature of the catalyst and the furnace temperature to be at least 50° C.; (7) controlling the partial pressure of the carbon containing gas to be less than 0.2; (8) growing a number of carbon nanotubes on the substrate such that a carbon nanotube array is formed on the substrate; and (9) drawing out a bundle of carbon nanotubes from the carbon nanotube array such that a carbon nanotube yarn is formed.

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Jiang et al. “Spinning continuous carbon nanotube yarns” Oct. 24, 2002, Nature, vol. 419, p. 801.

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