A fibrous carbon nanostructure dispersion liquid having excellent dispersibility of fibrous carbon nanostructures is provided. A fibrous carbon nanostructure dispersion liquid comprises: fibrous carbon nanostructures with a tap density of 0.024 g/cm.sup.3 or less; and a solvent.

A carbon nanotube field emitter comprises at least two electrodes and at least one graphitized carbon nanotube structure. The at least one graphitized carbon nanotube structure comprises a first end and a field emission end. The first end is opposite to the field emission end. The first end is fixed between the at least two electrodes, and the field emission end is exposed from the at least two electrodes and configured to emit electrons.

A method of treating an elongated conductive element comprises exposing a conductive element sequentially to at least two dopants being different in composition. The dopants may include an acidic dopant and a halogen-based dopant. The conductive element comprises a plurality of carbon nanotubes and has a linear density in a range from about 0.1 tex to about 2.0 tex. The method further comprises mechanically densifying the conductive element. The elongated conductive element comprises at least one carbon nanotube fiber doped with a plurality of p-type dopants comprising at least one acidic dopant and at least one halogen-based dopant. The at least one carbon nanotube fiber has an electrical resistivity equal to or less than about 55 μΩ.Math.cm and an ultimate tensile strength equal to or greater than about 1 GPa.

The present invention relates to entangled-type carbon nanotubes which have a bulk density of 31 kg/m.sup.3 to 85 kg/m.sup.3 and a ratio of tapped bulk density to bulk density of 1.37 to 2.05, and a method for preparing the entangled-type carbon nanotubes.

A method for fabricating an electron field emission cathode, the field emission cathode including a substrate having a field emission material layer engaged therewith, where the field emission material incorporates a carbon nanotube material and is produced via a sol-gel process to improve field emission characteristics of the field emission cathode and field emission cathode devices implementing such cathodes.

A composition suitable for coating a metallic substrate that is susceptible to corrosion is disclosed. The composition comprises a carrier medium and graphene platelets in which the graphene platelets comprise between 0.002 wt % and 0.09 wt % of the coating, and the graphene platelets comprise one of or a mixture of two or more of graphene nanoplates, bilayer graphene nanoplates, few-layer graphene nanoplates, and/or graphite flakes in which the graphite flakes have one nanoscale dimension and 25 or less layers

The purpose of the present disclosure is to provide a CNT fiber that is constituted of aligned carbon nanotubes (CNTs), is thin, has little irregularity in thickness, has excellent winding properties when undergoing coiling processing, and has superior conductivity. Provided is a CNT fiber constituted of carbon nanotubes (CNTs) having a thickness of 0.01 m-3 mm, having a coefficient of variation for irregularity in thickness of 0.2 or less, having a distribution rate a for deviation from roundness of 40% or greater, and a distribution rate b of 70% or greater. Also provided is a method for manufacturing the CNT fiber.

The present invention provides an electrode material for a sensor, the material includes a sheet-like carbon nanotube assembly including a plurality of carbon nanotubes, wherein a length of each carbon nanotube extends from one surface of the carbon nanotube assembly toward the other surface thereof, and the carbon nanotube assembly includes a low orientation portion of the carbon nanotubes.

Interlaced random networks of heterogeneous, rigid rod like particles such as metallic nanowires and carbon nanotubes are formed by various methods. The resulting combination provides characteristics that are unique and not attainable by either of the individual components on their own. In one of the embodiments, such heterogeneous networks are continuously formed on a master hot roller surface by application of the rigid rod components from separate sources and the post formed network is transferred fully or partially onto a receptor surface of a moving web directly in-contact with the master surface. In another embodiment the heterogeneous networks are formed on the said master surface or hot roller by applying formulations that are co-stabilized dispersions of heterogeneous, rigid rod like particles in a common solvent. In yet another embodiment, such heterogeneous networks are formed by contacting the receptor surface with more than one such master surface or hot roller.

A manufacturing method for carbon nanotube composite film is disclosed. The method comprises steps of: providing a substrate; coating a first aqueous solution dissolved with a charged polymer on a substrate to form a polymer film; dispersing a single-wall carbon nanotube powder into a second aqueous solution dissolved with a charged compound in order to obtain a semiconductor-type single-wall carbon nanotube aqueous solution, and charge properties of the charged compound and the charged polymer are opposite; coating the semiconductor-type single-wall carbon nanotube aqueous solution on the polymer film; after standing for a predetermined period of time, washing with a deionized water to remove an unabsorbed semiconductor-type single-wall carbon nanotube and excess charged polymer; and air drying, forming a carbon nanotube film on the polymer film. A manufacturing method for carbon nanotube TFT and a carbon nanotube TFT are also disclosed. The carbon nanotubes can be well tiled onto the substrate.