A composite material comprising carbon nanotubes is described, wherein said composite material does not comprise any carbon nanotube aggregates having a smallest dimension larger than 1 mm. The efficiency of dispersion and anchoring as well as processing capability of the commercially relevant carbon nanotube composites are significantly improved.

A structure includes boron nitride nanotubes, wherein the structure (i) is an extension region in a field-effect transistor or (ii) comprises a metallic interconnect to reduce the dielectric constant and therefore the RC-delay in the device. Also, a field-effect transistor structure includes a low-k spacer layer between metallic interconnects, wherein the low-k spacer layer includes boron nitride nanotubes. In addition, a method for reducing RC delay in an integrated circuit includes forming a component of the integrated circuit from boron nitride nanotubes.

A catalyst, catalyst precursor, and carbon nanotubes grown using the catalyst. The catalyst includes a support comprising alumina and a cobalt species on a surface of the support, wherein cobalt is the sole active catalyst species for carbon nanotube growth. The support surface is iron-free.

A catalyst, catalyst precursor, and carbon nanotubes grown using the catalyst. The catalyst includes a support comprising alumina and a cobalt species on a surface of the support, wherein cobalt is the sole active catalyst species for carbon nanotube growth. The support surface is iron-free.

Carbon nanotube (CNT) hybrid materials and methods of making such materials. A carbon nanotube (CNT) hybrid powder material includes a mesh of CNTs intimately interspersed with particles of a second material. In an example the material includes a blend that itself includes particles of a metal oxide supported catalyst and particles of a second material, and a mesh of CNTs is grown on the supported catalyst in the blend. The mesh of CNTs is effective to disperse the particles of the second material.

A carbon nanotube assembled wire includes a plurality of carbon nanotubes, wherein the plurality of carbon nanotubes include a plurality of nitrogen-doped single-walled carbon nanotubes, a content ratio of nitrogen in the carbon nanotube assembled wire is 0.5 atomic % or more and 6 atomic % or less, and a content ratio of graphitic nitrogen in the carbon nanotube assembled wire is 0.4 atomic % or more and 3.5 atomic % or less.

The disclosure provides a flexible electrode material, a flexible electrode, and their preparation methods and applications, belonging to the technical field of composite materials. The carbon microparticle composite material includes carbon particles and gallium oxide attached to the surface of the carbon microparticles. The flexible electrode material includes, by mass, 2-17 parts of gallium-coated carbon particles and 83-98 parts of liquid metal. The flexible electrode is prepared by coating the flexible electrode material onto a flexible substrate via screen printing, attaching copper conductive wires to both ends of the printed flexible electrode material, applying a viscoelastic material coating over the surface of the flexible electrode material, and curing and drying the flexible electrode material at room temperature. The composite material can be applied to electronic skin for detecting human body motion states and earth pressure cells for monitoring soil pressure in engineering projects.

A method of producing one or both of carbon nanotubes (CNT) and hydrogen in the reaction zone of a rotary tube reactor or a fluidized bed reactor that has an outlet. The reaction zone is heated to a reaction temperature between 60 and 900 C. A CNT catalyst is provided into the reaction zone at the reaction temperature. The CNT catalyst includes a transition-metal active catalyst supported on metal oxide particles having a high specific surface area. A process gas is flowed through the reaction zone. The process gas is a gaseous mixture of a hydrocarbon and hydrogen. The hydrocarbon includes at least one of methane, ethane, propane, butane, iso-butane, propene, 1-butene, 2-butene, and iso-butene. The hydrocarbon decomposes at the catalyst sites into CNT and hydrogen. Hydrogen is separated from the gases that exit the reactor through the reactor outlet.