Title:
電子電界放出特性を有する、小直径カーボンナノチューブの合成方法
Document Type and Number:
Japanese Patent JP2007533581
Kind Code:
A
Abstract:
Carbon nanotube material having an outer diameter less than 10 nm and a number of walls less than ten are disclosed. Also disclosed are an electron field emission device including a substrate, an optionally layer of adhesion-promoting layer, and a layer of electron field emission material. The electron field emission material includes a carbon nanotube having a number of concentric graphene shells per tube of from two to ten, an outer diameter from 2 to 8 nm, and a nanotube length greater than 0.1 microns. One method to fabricate carbon nanotubes includes the steps of (a) producing a catalyst containing Fe and Mo supported on MgO powder, (b) using a mixture of hydrogen and carbon containing gas as precursors, and (c) heating the catalyst to a temperature above 950° C. to produce a carbon nanotube. Another method of fabricating an electron field emission cathode includes the steps of (a) synthesizing electron field emission materials containing carbon nanotubes with a number of concentric graphene shells per tube from two to ten, an outer diameter of from 2 to 8 nm, and a length greater than 0.1 microns, (b) dispersing the electron field emission material in a suitable solvent, (c) depositing the electron field emission materials onto a substrate, and (d) annealing the substrate.
Inventors:
Jeriu
Chun Sheng Du
Cheng Kian
Bogao
Kikiu
Ot Zet. Zhou
Chun Sheng Du
Cheng Kian
Bogao
Kikiu
Ot Zet. Zhou
Application Number:
JP2006547203A
Publication Date:
November 22, 2007
Filing Date:
December 21, 2004
Export Citation:
Assignee:
Kintech Incorporated
Duque University
Duque University
International Classes:
C01B31/02; H01J1/304; H01J9/02
Domestic Patent References:
| JP2003205239A | 2003-07-22 | |||
| JP2003206117A | 2003-07-22 | |||
| JP2003300714A | 2003-10-21 | |||
| JP2003535794A | 2003-12-02 | |||
| JP2005343726A | 2005-12-15 | |||
| JP2005512925A | 2005-05-12 | |||
| JP2007513861A | 2007-05-31 | |||
| JP2006511437A | 2006-04-06 |
Foreign References:
| US20030102222A1 | 2003-06-05 | |||
| US7070472B2 | 2006-07-04 | |||
| WO2001094260A1 | 2001-12-13 | |||
| WO2000017102A1 | 2000-03-30 |
Attorney, Agent or Firm:
Toru Ishikawa