A method of making carbon nanotubes is provided, the method includes depositing a catalyst layer on a substrate, placing the substrate having the catalyst layer in a reaction furnace, heating the reaction furnace to a predetermined temperature, introducing a carbon source gas and a protective gas into the reaction furnace to grow a first carbon nanotube segment structure comprising a plurality of metallic carbon nanotube segments, and applying a pulsed electric field to grow a second carbon nanotube segment structure from the plurality of metallic carbon nanotube segments, where the pulsed electric field is a periodic electric field including a plurality of positive electric field pulses and a plurality of negative electric field pulses alternately arranged, and the second carbon nanotube segment structure includes a plurality of semiconducting carbon nanotube segments.

There is provided a photomask including a pellicle. The photomask may include a substrate and a pellicle, and mask patterns may be disposed on the substrate. The pellicle may include a carbon nanotube membrane providing a plurality of pores. The pellicle may include a coating layer on the carbon nanotube membrane.

There is provided a photomask including a pellicle. The photomask may include a substrate and a pellicle, and mask patterns may be disposed on the substrate. The pellicle may include a carbon nanotube membrane providing a plurality of pores. The pellicle may include a coating layer on the carbon nanotube membrane.

The present disclosure discloses a device and a method for preparing a high-density aligned carbon nanotube film. The device includes a container main body, a buffer partition plate and a solvent lead-out part. The buffer partition plate is located at a lower part of the container main body. The solvent lead-out part communicates with an interior of the container main body through a through hole in a side wall of the container main body and extends to an outside of the container main body. The method includes injecting a carbon nanotube solution into a container; immersing a substrate in the carbon nanotube solution; injecting a sealing liquid that is immiscible with the carbon nanotube solution along the substrate or the side wall of the container main body; and leading the solvent out or pulling the substrate such that the liquid surface of the substrate undergoes relative motion.

The present disclosure discloses a device and a method for preparing a high-density aligned carbon nanotube film. The device includes a container main body, a buffer partition plate and a solvent lead-out part. The buffer partition plate is located at a lower part of the container main body. The solvent lead-out part communicates with an interior of the container main body through a through hole in a side wall of the container main body and extends to an outside of the container main body. The method includes injecting a carbon nanotube solution into a container; immersing a substrate in the carbon nanotube solution; injecting a sealing liquid that is immiscible with the carbon nanotube solution along the substrate or the side wall of the container main body; and leading the solvent out or pulling the substrate such that the liquid surface of the substrate undergoes relative motion.

The invention provides liquid compositions comprising conductive carbon particles and/or carbon nanoparticles, a thickening agent, and a solvent. The carbon nanoparticles are preferably a mixture of graphite nanoplatelets and carbon nanotubes and the thickening agent is preferably a cellulose derivative. The liquid compositions can be used as ink to print highly conductive films that adhere to paper substrates.

Disclosed is a method of producing surface-treated carbon nanostructures which comprises: a depressurization step wherein a carbon nanostructure-containing liquid which comprises carbon nanostructures and a dispersion medium is depressurized; and a surface treatment step wherein an oxidizing agent is added in the carbon nanostructure-containing liquid after or during the depressurization step so that the carbon nanostructures have a surface oxygen atom concentration of 7.0 at % or more. The carbon nanostructures preferably comprise carbon nanotubes.

Disclosed is a method of producing surface-treated carbon nanostructures which comprises: a depressurization step wherein a carbon nanostructure-containing liquid which comprises carbon nanostructures and a dispersion medium is depressurized; and a surface treatment step wherein an oxidizing agent is added in the carbon nanostructure-containing liquid after or during the depressurization step so that the carbon nanostructures have a surface oxygen atom concentration of 7.0 at % or more. The carbon nanostructures preferably comprise carbon nanotubes.

The present invention relates to a method of reproducing at least one single-walled carbon nanotube (3) having predefined electronic properties or a plurality of single-walled carbon nanotube (3) having the same electronic properties. A dispersion (2) is produced for this purpose and carbon nanotubes (3) contained in the dispersion are processed into fragments (6) by energy input. These fragments (6) are applied to and oriented on a carrier (7). The fragments (6) are subsequently extended by chemical vapor deposition and the originally present carbon nanotubes (3) are thus reproduced.

The present invention relates to a method of reproducing at least one single-walled carbon nanotube (3) having predefined electronic properties or a plurality of single-walled carbon nanotube (3) having the same electronic properties. A dispersion (2) is produced for this purpose and carbon nanotubes (3) contained in the dispersion are processed into fragments (6) by energy input. These fragments (6) are applied to and oriented on a carrier (7). The fragments (6) are subsequently extended by chemical vapor deposition and the originally present carbon nanotubes (3) are thus reproduced.