摘要:
PROBLEM TO BE SOLVED: To provide double-walled carbon nanotubes which are highly pure and the length or height of each of which is drastically enlarged, and an oriented bulk structure for the same. SOLUTION: The oriented bulk structure of the double-walled carbon nanotubes, which is the assembly of a plurality of oriented double-walled carbon nanotubes and has a height of ≥0.1 μm, and the double-walled carbon nanotubes are produced by subjecting carbon nanotubes to chemical vapor deposition in the presence of a metal catalyst, whose particle diameter and film thickness have been controlled, and preferably in the presence of moisture. COPYRIGHT: (C)2007,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method of cutting a carbon nanotube containing metal particles or no metal particles, the carbon nanotube, a field emitter, a catalyst support and a mixed material of the carbon nanotube. SOLUTION: The short carbon nanotube having widened surface area, the method of cutting the carbon nanotube by which the structure change or the surface improvement of the carbon nanotube is facilitated to wholly facilitate the dispersion of the carbon nanotubes and an active component is enabled to insert into the inner wall of the carbon nanotube to increase the insertion efficiency, the carbon nanotube, the field emitter, the catalyst support and the mixed material of the carbon nanotube are provided. COPYRIGHT: (C)2007,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a formed body of a linear structural material comprising carbon element and a forming method by which a carbon nanotube (CNT) is easily and surely formed without depending on the substrate or a base material for depositing a catalytic metal and even when a substrate is not used and a method of forming the same. SOLUTION: The CNT 4 is grown from a titanium-cobalt combined fine particle 3 by the CVD method after the titanium-cobalt combined fine particle 3 is deposited on an insulating film 2 on a silicon substrate 1 using a catalytic fine particle forming system. COPYRIGHT: (C)2006,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a coating material for electric parts, capable of forming cross-linked carbon nanotube film that can practically be used on the electric parts formed by coating or printing and provide a method for forming coating film by using the coating material for electric parts. SOLUTION: This coating material includes at least functional group-bearing carbon nanotubes and a cross-linking agent that can cross-link between the functional groups by thermal cross-linking reaction. The cross-linking agent of this coating material is characteristically glycerol and/or butanetriol. The paint for electric parts are coated on the surfaces of the substrates and heated to form the carbon nanotube cross-linked coating film on the substrate surface. COPYRIGHT: (C)2006,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a novel carbon nanotube production apparatus and method capable of optionally selecting the use of a metal catalyst in a vapor deposition method being capable of continuously operated and suited for mass production and to provide a gas decomposer suitable for use therein. SOLUTION: (1) The production apparatus comprises a reaction tube 6, a gas feed pipe 4 that feeds a stream containing a carbon-containing raw material into the inside of the reaction tube 6, a heating means 5 that heats the inside of the reaction tube 6, a gas decomposer 7 that decomposes the stream by contact therewith, and a synthesis part 8 that synthesizes carbon nanotubes. (2) The production method comprises bringing a stream containing a carbon-containing raw material into contact with a heated gas decomposer 7 to decompose the raw material and continuously feeding the product of decomposition into a synthesis part 8 to synthesize carbon nanotubes on the synthesis part 8. (3) The gas decomposer is made from a porous material and decomposes a carbon-containing raw material in a stream containing the raw-material and synthesizes carbon nanotubes from the production of decomposition. COPYRIGHT: (C)2005,JPO&NCIPI
摘要:
The present invention is related to a method for producing short carbon nanotubes with open tips by mechanical treatment of long carbon nanotubes, characterised in that it comprises the step of submitting said long nanotubes to mechanical milling forces. The present invention is also related to a mixture comprising long nanotubes and at least 10% of short carbon nanotubes, said short carbon nanotubes having at least one open tip and having an average length smaller than 2 mu m.