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Carbon nanotube structure-selective separation and surface fixation

外国特許コード F110005474
整理番号 K05329WO
掲載日 2011年9月6日
出願国 アメリカ合衆国
出願番号 59779005
公報番号 20070258880
公報番号 7785472
出願日 平成17年2月10日(2005.2.10)
公報発行日 平成19年11月8日(2007.11.8)
公報発行日 平成22年8月31日(2010.8.31)
国際出願番号 JP2005002085
国際公開番号 WO2005077827
国際出願日 平成17年2月10日(2005.2.10)
国際公開日 平成17年8月25日(2005.8.25)
優先権データ
  • 特願2004-039100 (2004.2.16) JP
  • 2005WO-JP02085 (2005.2.10) WO
発明の名称 (英語) Carbon nanotube structure-selective separation and surface fixation
発明の概要(英語) (US7785472)
A method of separating, concentrating or purifying uniform carbon nanotubes with desired properties (diameter, chiral vector, etc) in a highly sensitive manner by the use of structure-sensitive properties peculiar to carbon nanotubes; and an apparatus therefor.
There is provided a method of separating, concentrating, or purifying carbon nanotubes with the desired properties contained in a sample, comprising the steps of (a) irradiating a sample containing carbon nanotubes with light; and (b) selecting carbon nanotubes with desired properties.
In a preferred embodiment, the light irradiation of the step (a) can be carried out in the presence of a metal so as to cause specified carbon nanotubes to selectively induce a photocatalytic reaction, resulting in metal deposition.
Further, in a preferred embodiment, a given magnetic filed can be applied in the steps (b) so as to attain accumulation or concentration or carbon nanotubes with metal deposited.
特許請求の範囲(英語) [claim1]
1. A method of separating, concentrating, or refining a carbon nanotube having a desired physical property from a sample solution, wherein the desired physical property includes at least one of a diameter or a chiral vector, the method comprising: a) irradiating light to the sample solution containing carbon nanotubes in the presence of metal ions, so that the metal ions are respectively reduced and deposited on the carbon nanotubes, and
b) selecting the carbon nanotubes having the desired physical property by applying a predetermined magnetic field or chromatography to the carbon nanotubes so as to precipitate the carbon nanotubes with the desired physical property.
[claim2]
2. The method according to claim 1, wherein said carbon nanotube has a single-walled structure.
[claim3]
3. The method according to claim 1, wherein said light has a certain wavelength within a range covering from the near infrared region to the ultraviolet region.
[claim4]
4. The method according to claim 3, wherein said light is monochromatic light or laser light having said wavelength.
[claim5]
5. The method according to claim 1, wherein the metal ions are selected from the group consisting of alkali metals; alkaline earth metals; transition metals selected from the group consisting of Group IIIA to Group VIIA elements, Group VIII elements, and Group IB elements; and rare earth elements.
[claim6]
6. The method according to claim 1, wherein the step b) is carried out by applying a predetermined magnetic field to said carbon nanotube so as to precipitate the carbon nanotube with the desired physical property.
[claim7]
7. The method according to claim 1, wherein the step b) is carried out by chromatography.
[claim8]
8. The method according to claim 1, wherein said sample further contains a surfactant.
[claim9]
9. The method according to claim 8, wherein said surfactant is selected from the group consisting of sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, Triton X, alkylsulfonates, sodium polyoxyethylene alkyl ether sulfate, benzalconium chloride, alkyltrimethylammonium chloride, benzyltrimethylammonium chloride, nonyl phenol ethoxylate, octyl phenyl polyoxyethylene ether, lauryl polyoxyethylene ether, and cetyl polyoxyethylene ether.
[claim10]
10. The method according to claim 1, wherein said sample is a water-based dispersion or an aqueous solution of the carbon nanotubes.
[claim11]
11. The method according to claim 1, wherein said carbon nanotubes are surface modified with a saturated or unsaturated carbon chain molecule having a carboxyl group or an amino group as a substituent in the molecule through a covalent bond, an ionic bond, a hydrogen bond, or an intermolecular interaction.
[claim12]
12. The method according to claim 1, wherein said sample solution further containing a metal ion and an electron donor.
[claim13]
13. The method according to claim 12, wherein said solution contains the metal ion at a concentration of 0.001 to 10%.
[claim14]
14. The method according to claim 12, wherein said solution contains the electron donor at a concentration of 0.001 to 10%.
[claim15]
15. The method according to claim 12, wherein said electron donor is selected from the group consisting of alcohols, amines, arginine, benzaldehyde, hydrazine, carboxylic acids, amino acids, toluene, alkylbenzenes, terpenes, ethers, silanes, and thiols.
  • 発明者/出願人(英語)
  • MURAKOSHI KEI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 210/656
  • 209/1
  • 209/3
  • 209/4
  • 210/695
  • 210/748.01
  • 210/749
  • 423/460
  • 423/461
  • 977/745
  • 977/748
  • 977/751
  • 977/845
  • 977/848
参考情報 (研究プロジェクト等) PRESTO Conversion and Control by Advanced Chemistry AREA
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