# US 10,767,282 B2 · Method for manufacturing carbon nanostructure, and device for manufacturing carbon nanostructure

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- Number: US 10,767,282 B2
- Document ID: US10767282B2
- Status: Granted
- Kind: B2
- Application number: 15/774,602
- Filed: 2016-07-21
- Published: 2018-11-15
- Granted: 2020-09-08
- Earliest claimed: 2015-11-11
- Assignees: Sumitomo Electric Industries, Ltd.
- Applicants: Sumitomo Electric Industries, Ltd.
- Inventors: Takeshi Hikata; Soichiro Okubo; Ryusuke Nakai; Daisuke Tanioka
- Web page: https://patentgrep.com/patent/US10767282B2

## CPC

- D01F 9/1275: {Acetylene}
- C23C 8/20: Carburising
- D01F 9/133: Apparatus therefor
- B82Y 40/00: Manufacture or treatment of nanostructures
- D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES

## Abstract

A method for manufacturing a carbon nanostructure according to an embodiment of the present invention is a method for manufacturing a carbon nanostructure, the method including a preparation step of preparing a substrate containing a carburizable metal as a main component, and a carbon nanostructure growth step of supplying a carbon-containing gas while heating the substrate, in which the carbon nanostructure growth step includes gradually cleaving a heated portion of the substrate. The cleaving in the carbon nanostructure growth step is preferably performed by subjecting the substrate to shearing. The heating in the carbon nanostructure growth step is preferably performed by irradiating a cleaving portion of the substrate with a laser. The preparation step preferably includes forming, in the substrate, a notch for inducing cleavage. Preferably, the substrate in the carbon nanostructure growth step is not oxidized.

## Claims

### Claim 1

A method for manufacturing a carbon nanostructure, comprising:
a preparation step of preparing a substrate containing a carburizable metal as a main component; and
a carbon nanostructure growth step of supplying a carbon-containing gas while heating the substrate,
wherein the carbon nanostructure growth step includes gradually cleaving a heated portion of the substrate.

### Claim 2 (depends on 1)

The method for manufacturing a carbon nanostructure according to claim 1, wherein the cleaving in the carbon nanostructure growth step is performed by subjecting the substrate to shearing.

### Claim 3 (depends on 1)

The method for manufacturing a carbon nanostructure according to claim 1, wherein the heating in the carbon nanostructure growth step is performed by irradiating a cleaving portion of the substrate with a laser.

### Claim 4 (depends on 1)

The method for manufacturing a carbon nanostructure according to claim 1, wherein the preparation step includes forming, in the substrate, a notch for inducing cleavage.

### Claim 5 (depends on 1)

The method for manufacturing a carbon nanostructure according to claim 1, wherein the substrate in the carbon nanostructure growth step is not oxidized.

### Claim 6 (depends on 1)

The method for manufacturing a carbon nanostructure according to claim 1, further comprising an observation step of observing a cleaving portion of the substrate in the carbon nanostructure growth step.