Top > Search of International Patents > Sharp end, multi-layer carbon nano-tube radial aggregate and method of manufacturing the aggregate

Sharp end, multi-layer carbon nano-tube radial aggregate and method of manufacturing the aggregate

Foreign code F110005329
File No. IAC-13-10US
Posted date Aug 31, 2011
Country United States of America
Application number 49545902
Gazette No. 20050037150
Gazette No. 7261941
Date of filing Nov 5, 2002
Gazette Date Feb 17, 2005
Gazette Date Aug 28, 2007
International application number JP2002011516
International publication number WO2003057620
Date of international filing Nov 5, 2002
Date of international publication Jul 17, 2003
Priority data
  • P2002-001810 (Jan 8, 2002) JP
  • 2002WO-JP11516 (Nov 5, 2002) WO
Title Sharp end, multi-layer carbon nano-tube radial aggregate and method of manufacturing the aggregate
Abstract (US7261941)
A method of manufacturing a acute tip, multi-wall carbon nanotube radial aggregate, comprising the steps of leading a graphite rod into plasma flame generated in a hydrogen-added inert gas atmosphere to evaporate carbon from the graphite rod and stacking, on the surface of the graphite rod, the acute tip, multi-wall carbon nanotube radial aggregation of novel carbon nano-structure useful as field emission electron sources such as probes for STM and APM, display elements, and displays.
Scope of claims [claim1]
1. An acute closed tip, multi-wall carbon nanotube radial aggregate, which includes a plurality of acute tip, multi-wall carbon nanotubes which each have one sharp, acute angled-end and are radially aggregated with the acute tip portion thereof being disposed outward.
[claim2]
2. The acute tip, multi-wall carbon nanotube radial aggregate described in claim 1 wherein the diameter of the innermost carbon nanotube of the acute tip, multi-wall carbon nanotube is approximately 0.4 nm.
[claim3]
3. The acute tip, multi-wall carbon nanotube radial aggregate described in claim 1, wherein the acute tip portion of the acute tip, multi-wall carbon nanotube has a conical shape and a tip-end angle of the acute tip portion is 40 deg. or less.
[claim4]
4. The acute tip, multi-wall carbon nanotube radial aggregate described in claim 3, wherein the acute tip portion of the acute tip, multi-wall carbon nanotube has a conical shape and the apex of the cone is located at one of a position along the axis of the acute tip, multi-wall carbon nanotube, a position along an extension of the tube wall, and a position therebetween.
[claim5]
5. The acute tip, multi-wall carbon nanotube radial aggregate described in claim 1, wherein the diameter of the aggregate is in a range of 1 to 5 mu m.
[claim6]
6. A film of acute tip, multi-wall carbon nanotube radial aggregate, which includes a plurality of the acute tip, multi-wall carbon nanotube, radial aggregates described in claim 1, which aggregates are stacked to form a film.
[claim7]
7. The film of acute tip, multi-wall carbon nanotube radial aggregate according to claim 6, wherein the thickness of the film of the acute tip, multi-wall carbon nanotube radial aggregate is in a range of 20 to 150 mu m.
  • Inventor, and Inventor/Applicant
  • IIJIMA SUMIO
  • YUDASAKA MASAKO
  • KOSHIO AKIRA
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • NEC
IPC(International Patent Classification)
Please contact us by E-mail or facsimile if you have any interests on this patent.

PAGE TOP

close
close
close
close
close
close