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

外国特許コード F110005329
整理番号 IAC-13-10US
掲載日 2011年8月31日
出願国 アメリカ合衆国
出願番号 49545902
公報番号 20050037150
公報番号 7261941
出願日 平成14年11月5日(2002.11.5)
公報発行日 平成17年2月17日(2005.2.17)
公報発行日 平成19年8月28日(2007.8.28)
国際出願番号 JP2002011516
国際公開番号 WO2003057620
国際出願日 平成14年11月5日(2002.11.5)
国際公開日 平成15年7月17日(2003.7.17)
優先権データ
  • 特願2002-001810 (2002.1.8) JP
  • 2002WO-JP11516 (2002.11.5) WO
発明の名称 (英語) Sharp end, multi-layer carbon nano-tube radial aggregate and method of manufacturing the aggregate
発明の概要(英語) (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.
特許請求の範囲(英語) [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.
  • 発明者/出願人(英語)
  • IIJIMA SUMIO
  • YUDASAKA MASAKO
  • KOSHIO AKIRA
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • NEC
国際特許分類(IPC)
米国特許分類/主・副
  • 428/408
  • 977/741
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