107results about "Aligned nanotubes" patented technology

High-performance carbon nanotube (CNT) based millimeter-wave transistor technologies and demonstrate monolithic millimeter-wave integrated circuits (MMICs) based thereon, and methods and processes for the fabrication thereof are also provided. CNT technologies and MMICs demonstrate improved power efficiency, linearity, noise and dynamic range performance over existing GaAs, SiGe and RF-CMOS technologies. Methods and processes in CNT alignment and deposition, material contact and doping are configured to fabricate high quality CNT arrays beyond the current state-of-the-art and produce high performance RF transistors that are scalable to wafer size to enable fabrication of monolithic integrated circuits based on CNTs.

The application provides a preparation method of a transparent conductive film. The method comprises the following steps: laying a raw carbon nanotube film with a set area on a substrate surface and placing the substrate in a growth cavity; the substrate and the gas in the growth cavity are subjected to surface reconstruction, accompanied by transportation of facet atoms constituting a facet, so that a facet is formed, and the facet is in the form of a regular step on the substrate surface in a mesoscopic scale; and the facet and the raw carbon nanotube film are allowed to interact, so that impurities in the raw carbon nanotube film are removed, at least part of carbon nanotubes in the raw carbon nanotube film are driven to move by the facet, adjacent carbon nanotubes or bundles of carbon nanotubes tend to be close to each other, and a carbon nanotube network in the raw carbon nanotube film is recombined to obtain a recombined carbon nanotube film. The recombined carbon nanotube film obtained by the method has a more efficient conductive network inside, can be self-supported, and can also realize large-area preparation of the transparent conductive film.

The purpose of the present invention is to provide a carbon nanotube liquid dispersion that allows secondary battery electrodes to demonstrate a strong peel strength between an electrode mixture layer and a current collector formed from a metal, etc., and a weak peel strength for an electrode mixture layer provided with a release substrate made of a resin or the like, between the electrode mixture layer and the release substrate; and to allow a secondary battery to demonstrate superior rate performance, or realizes good film formation properties when a carbon film is formed. The carbon nanotube liquid dispersion according to the present invention contains carbon nanotubes and a solvent, wherein when a scattering curve obtained by the measurement conducted with ultra-small-angle X-ray scattering method is analyzed by the Beaucage model, the fractal dimension within a wavenumber range from 0.001 (1 / Å) to 0.3 (1 / Å) is in the range from 3 to 4.

A process for making a carbon nanotube structure includes forming a composite by depositing or growing carbon nanotubes onto a metal substrate, and infusing the carbon nanotubes. In other aspects, a method of making a wire, includes coating carbon nanotubes on a wire, and electroplating the carbon nanotubes. In still other aspects, a method of making a conductor includes growing or depositing vertically aligned carbon nanotubes on a sheet. Yet still, a method of making a cable includes forming multiple composite wires, each composite wire formed by depositing or growing carbon nanotubes onto a metal substrate, and performing a metal infusion of the carbon nanotubes. The method also comprises combining multiple finished composite wires or objects to make large cables or straps.

Methods and systems for the fabrication of composite materials are generally described. Certain inventive methods and systems can be used to fabricate composite materials with few or no defects. According to certain embodiments, composite materials are fabricated without the use of an autoclave. In some embodiments, composite materials are fabricated in low pressure environments.

A method for providing a substrate made of a porous carbonaceous material with vertically aligned carbon nanotubes, the method having a first step of depositing a ceramic underlayer on the substrate followed by a second step of synthesizing, by catalytic chemical vapour deposition, the vertically aligned carbon nanotubes on the substrate obtained after the first step, the carbon source necessary for the synthesis during this second step being injected in a direction substantially perpendicular to the plane of the substrate and at a pressure less than 8104 Pa (800 mbar). The use of the substrate for preparing an electrode such as a supercapacitor electrode.

Embodiments of the present disclosure relate to methods and apparatus for producing carbon nanomaterial (CNM) products, which may include carbon nanotubes and various other allotropes of nanocarbon. The methods and apparatus use consumable carbon dioxide (CO2) and renewable carbonate electrolyte as reactants in an electrolysis reaction to make CNTs. In some embodiments of the present disclosure, the operating conditions of the electrolysis reaction may be varied to produce CNM products with greater generation of a desired allotrope of nanocarbon or a desired combination of two or more allotropes.

A connection structure of a carbon nanotube wire includes a joint between the carbon nanotube wire and the connection target. For example, a connection structure of a carbon nanotube wire includes a carbon nanotube wire, and, a connection target to which the carbon nanotube wire is connected. The connection structure further includes a conducting wire with higher solder wettability than the carbon nanotube wire, a penetrating part of the conducting wire formed along a cross section having a component orthogonal to a longitudinal direction of the carbon nanotube wire, and solder that connects the carbon nanotube wire and the connection target. The solder penetrates the penetrating part formed along the conducting wire.

Embodiments of the present disclosure relate to methods and apparatus for producing carbon nanomaterial (CNM) products, which may include carbon nanotubes and various other allotropes of nanocarbon. The methods and apparatus use consumable carbon dioxide (CO2) and renewable carbonate electrolyte as reactants in an electrolysis reaction to make CNTs. In some embodiments of the present disclosure, the operating conditions of the electrolysis reaction may be varied to produce CNM products with even greater generation of a desired allotrope of nanocarbon or a desired combination of two or more allotropes.

The purpose of the present invention is to provide a manufacturing method for carbon nanotube aggregates, which makes it possible to efficiently produce high-quality carbon nanotubes aggregates.　The present invention is a manufacturing method in which carbon nanotube aggregates are grown on a substrate having a catalyst on the surface. In the manufacturing method, a substrate is continuously transported using a transport unit for transporting the substrate, by screw rotation, in each of: a formation unit for performing a formation step in which a catalyst on the substrate is put in a reduction state; and a growth unit for performing a growth step in which carbon nanotube aggregates are grown. Moreover, when implementing the formation step and the growth step, gas environments in these steps are prevented from being mixed with each other while both steps are implemented.

A production method for growing a carbon nanotube assembly on a substrate having a catalyst on a surface thereof. In this production method, in each of a formation unit that carries out a formation step of reducing a catalyst on the substrate and a growth unit that carries out a growth step of growing a carbon nanotube assembly, the substrate is continuously being conveyed using conveyance units that convey the substrate by screw rotations. In carrying out the formation step and the growth step, these steps are carried out while the gas environments in these steps are prevented from mixing with each other.

A nanotube array preparation method, a nanotube array, and a device. The method comprises: on a substrate (10), preparing a double-layer two-dimensional material with lattice orientations having a relative included angle formed therebetween, and using the double-layer two-dimensional material as a template; determining a chiral parameter of a nanotube to be prepared corresponding to the relative included angle between the lattice orientations of the double-layer two-dimensional material, determining a nanoribbon orientation and a nanoribbon width on the basis of the determined chiral parameter, determining the spacing between nanoribbons on the basis of the density of the nanotube to be prepared and the nanoribbon width, and etching the double-layer two-dimensional material on the basis of the determined nanoribbon orientation, nanoribbon width, and spacing between the nanoribbons to obtain a nanoribbon array of the double-layer two-dimensional material; and performing thermal excitation treatment on the obtained nanoribbon array of the double-layer two-dimensional material to obtain a nanotube array. In this way, the nanotube array having controllable density, orientation and chirality can be prepared.

Embodiments of the present disclosure relate to methods and apparatus for producing carbon nanomaterial (CNM) products, which may include carbon nanotubes and various other allotropes of nanocarbon. The methods and apparatus use consumable carbon dioxide (CO2) and renewable carbonate electrolyte as reactants in an electrolysis reaction to make CNTs. In some embodiments of the present disclosure, the operating conditions of the electrolysis reaction may be varied to produce CNM products with even greater generation of a desired allotrope of nanocarbon or a desired combination of two or more allotropes.

The present invention relates to a method for producing a carbon nanotube fiber aggregate and provides a carbon nanotube fiber aggregate having an improved level of alignment through ultrasonic wave application and low speed recovery.

The present invention provides a nanotube array manufacturing method, a nanotube array, and a device, the method comprising the steps of: manufacturing a bilayer two-dimensional material having a relative include angle of lattice orientation on a substrate as a template; determining a chiral parameter of the nanotubes to be manufactured corresponding to the relative include angle of the lattice orientation of the bilayer two-dimensional material; determining a nanoribbon orientation and nanoribbon width based on the determined chiral parameter; determining a pitch between nanoribbons based on the density and nanoribbon width of the nanotubes to be manufactured; etching the bilayer two-dimensional material based on the determined nanoribbon orientation, nanoribbon width, and pitch between nanoribbons to obtain a nanoribbon array of the bilayer two-dimensional material; and thermally exciting the obtained nanotube array made of the bilayer two-dimensional material to obtain a nanotube array. The present invention can manufacture a nanotube array with controllable density, orientation, and chirality.

Carbon nanostructure-based composites and methods for making and using the same are described. The carbon nanostructure-based composites can be single-layer or multi-layer composites. Such composites can be useful for shielding radiation, such as that experienced by spacecraft and satellites. Carbon nanostructure-based composites containing low-Z and high-shielding efficiency (e.g., high-Z) materials and having radiation-shielding properties are described herein. A non-limiting exemplary composite is shown in Figure 1.

A method for producing a carbon nanomaterial product comprising: heating an electrolyte media to obtain a molten electrolyte media; positioning the molten electrolyte media between an anode and a cathode of an electrolytic cell; introducing a source of carbon into the electrolytic cell; introducing an iron-free, nickel-free, chromium-containing additive into the electrolyte media before the step of heating or introducing the iron-free, nickel-free chromium-containing additive into the molten electrolyte media, in which the iron-free, nickel-free, chromium-containing additive is added in an amount of between 0.05 wt % and 2 wt %, relative to the amount of the electrolyte media or the molten electrolyte media; applying an electrical current to the cathode and the anode in the electrolytic cell; and collecting the CNM product from the cathode, the CNM product comprises a minimum relative-amount of between 50 wt % and 99 wt %, relative to a total weight of the CNM product of nano-carbon flowers.

A high-performance lithium battery current collector and a conductive slurry, and preparation methods therefor. A functional coating of the current collector is a functional layered covering structure with a thickness of no more than 800 nm formed by coating a conductive slurry on a surface of a metal foil and drying. The functional coating includes a plurality of strip-shaped modified conductive agents, and after being cured and molded, the modified conductive agents are parallel to one another in the functional coating, axes of the modified conductive agents are arranged obliquely relative to a surface of the metal foil at an included angle of 15° to 45° within a thickness of the functional coating, and the modified conductive agents are interwoven with a modified nanofiber, a binder and the conductive agent in the coating.

Methods for producing a conductive element precursor and a conductive element, such as a tape or wire, are provided. The methods comprise growing a plurality of carbon nanotubes on a metallic substrate and coating carbon nanotubes of the plurality of carbon nanotubes on the metallic substrate with a metallic material.

Methods and systems for the fabrication of composite materials are generally described. Certain inventive methods and systems can be used to fabricate composite materials with few or no defects. According to certain embodiments, composite materials are fabricated without the use of an autoclave. In some embodiments, composite materials are fabricated in low pressure environments.

The purpose of the present invention is to provide carbon nanotube (CNT) aggregates having excellent dispersibility, and a method for producing the CNT aggregates.　The present invention pertains to carbon nanotube aggregates that satisfy at least one of conditions (1) to (3) below. (1) In an FT-IR spectrum of a CNT dispersion obtained by dispersing the CNT aggregates, a peak based on CNT plasmon resonance that is present in the range of a wave number exceeding 300 cm-1 but not more than 2,000 cm-1. (2) A maximum peak in differential pore volume distribution of the CNT aggregates falling in the range of a pore size exceeding 100 nm but less than 400 nm. (3) At least one peak in the two-dimensional spatial frequency spectrum of the CNT aggregates present in the range of 1 μm-1 to 100 μm-1, inclusive.

To provide a catalyst for preparing a carbon nanotube capable of synthesizing a low-diameter carbon nanotube, and a method for preparing the same.SOLUTION: There is provided a method for preparing a catalyst for preparing a carbon nanotube, comprising: (a) dissolving a main catalyst precursor, a support precursor, a cocatalyst precursor and a precipitation inhibitor in a solvent to prepare a precursor solution; and (b) pyrolyzing the precursor solution by spraying the precursor solution into a reactor, wherein a mole fraction of the precipitation inhibitor to the cocatalyst precursor is 0.1 to 1.5.SELECTED DRAWING: Figure 1

The proposed invention relates to the electrotechnical industry, more particularly to lithium-ion batteries, and even more particularly to lithium-ion batteries with silicon-containing anodes. The invention provides a method for preparing an anode paste, an anode paste, a method for preparing an anode for a lithium-ion battery, an anode for a lithium-ion battery, and a lithium-ion battery with a high initial specific capacity and many charge-discharge cycles while retaining at least 80% of the initial capacity. This technical result is achievable as a result of the presence of an anode material of bundles of single-walled and / or double-walled carbon nanotubes having lengths less than 5 μm, along with bundles of single-walled / double-walled carbon nanotubes having diameters greater than 500 nm and lengths greater than 10 μm.

Disclosed are a VACNT transfer method, a VACNT transfer system for the entire substrate, and a VACNT device. The VACNT transfer method comprises: a first step of cooling a substrate to be transferred, to condense and cool water vapor on the surface of the substrate to be transferred, thereby forming an ice layer; and a second step of liquefying the ice layer and then cooling same again, while VACNTs are disposed on the ice layer.

A method of manufacturing a carbon nanotube sheet includes providing carbon nanotubes, advancing an elastic sheet having a first surface and a second surface opposite to the first surface in a first direction toward a direction changing member, bringing the first surface into contact with the direction changing member and looping the elastic sheet over the direction changing member so as to extend the second surface, advancing the elastic sheet from the direction changing member in a second direction different from the first direction so as to contract the second surface, causing upper ends of the carbon nanotubes to penetrate the second surface that is extended by being looped over the direction changing member, thereby providing temporal fixation therefor, and moving the carbon nanotubes in the second direction while the upper ends are penetrating the second surface.

Composite materials based on carbon nanostructures and methods of making and using the same are described. The carbon nanostructure-based composite material may be a single-layer or multi-layer composite material. Such composites may be used for radiation shielding, such as those experienced by spacecrafts and space satellites.

The object of the present invention is to provide a production method and a production apparatus for a thin film of aligned carbon nanotubes. The present invention relates to a production method for an aligned carbon nanotube film having a film thickness of less than 1000 nm, including a step of causing a part of a dispersion solvent liquid of a carbon nanotube dispersion liquid to permeate to a lower surface side of a filter paper while causing the carbon nanotube dispersion liquid to flow in one direction on an upper surface of the filter paper, and a production apparatus that can be used for said method.

Methods and systems for the fabrication of composite materials are generally described. Certain inventive methods and systems can be used to fabricate composite materials with few or no defects. According to certain embodiments, composite materials are fabricated without the use of an autoclave. In some embodiments, composite materials are fabricated in low pressure environments.

The present invention relates to bundle-type carbon nanotubes having an average bundle thickness of 10 um or more and a D50 of 10 µm or more. The carbon nanotubes have excellent electrical conductivity and dispersibility and are particularly suitable for use as a conductive material.

The substrate includes carbon nanotubes oriented substantially parallel away from the substrate. In a plane along the surface of the substrate, the carbon nanotubes are formed within first cells of a carbon nanotube connection structure. The first cells are formed within a second structure of second cells, whereby the carbon nanotubes are patterned into the structure of the first cells and nested within the structure of the second cells. The first cells include at least one opening without carbon nanotubes to provide access to the surface of the substrate. The second cells are separated from each other by grooves to prevent carbon nanotubes of a second cell from contacting carbon nanotubes of another second cell across a first gap formed by the grooves. The grooves provide access to the substrate. [Selection diagram] None