Carbon nanotubes with nitrogen content

Details Carbon nanotubes with nitrogen content Carbon nanotubes with nitrogen content

2001-09-20

2003-12-16

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

C313S310000

Reexamination Certificate

active

06664728

ABSTRACT:

TECHNICAL FIELD
The present invention relates in general to field emission devices, and in particular, to field emission devices utilizing carbon nanotubes.
BACKGROUND INFORMATION
Carbon nanotubes
anofibers have attracted much interest because of their unique physical properties and many potential applications. One significant application is as field-emission electron sources. These sources can find themselves imbedded in other applications such as displays, x-ray sources, microwave devices, satellite thrusters, etc. Carbon nanotubes were first discovered by Iijima, (see S. Iijima, Nature (London) Vol. 354, p. 56, 1991 which is hereby incorporated by reference herein). Since then, many have developed several methods of fabricating the material. For field emission source applications, the state of the art is to either fabricate the tubes in a reactor and then place them on a substrate surface, (see Sashiro Uemura, Junko Yotani, Takeshi Hagasako, Yahachi Saito and Motoo Yumura, “High-Luminance Carbon Nanotube FED”, SID 2000 Digest of Technical Papers, p. 320 (2000); and P. G. Collins and A. Zettl, Appl. Phys. Lett., Vol. 69, p. 1969 (1996)) or grow them directly onto the substrate surface. The latter method is generally preferred since the field emission properties of the resulting film are not degraded by the presence of binders and adhesives to secure the carbon nanotubes to the substrate.


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