Abstract: Provided is an oxidized carbon nanotube assembly having excellent dispersibility in a polar solvent. The oxidized carbon nanotube assembly includes oxidized single-walled carbon nanotubes, has a ratio of the number of oxidized single-walled carbon nanotubes relative to the total number of oxidized carbon nanotubes in the oxidized carbon nanotube assembly of 51% or more, and has a heat of immersion per unit area in water of not less than 1,500 mJ/m2 and not more than 10,000 mJ/m2.

Abstract: Provided is a technique related to oxidized carbon nanotubes having excellent dispersion stability and dispersibility in water. The oxidized carbon nanotubes include oxidized single-walled carbon nanotubes, have a ratio of the oxidized single-walled carbon nanotubes relative to the total number of oxidized carbon nanotubes of more than 50%, and have a BET specific surface area of 100 m2/g or less.

Abstract: Provided is a technique related to oxidized CNTs having excellent dispersion stability and dispersibility in water. The oxidized CNTs include oxidized single-walled CNTs, have a ratio of the oxidized single-walled CNTs relative to the total number of oxidized CNTs of more than 50%, and have a D? band in a Raman spectrum.

Abstract: A fibrous carbon nanostructure dispersion liquid contains a solvent and fibrous carbon nanostructures having at least one absorption peak in a wavenumber region of 500 cm?1 to 600 cm?1 in a light absorption spectrum.

Abstract: A fibrous carbon nanostructure dispersion liquid contains a solvent and fibrous carbon nanostructures having at least one absorption peak in a wavenumber region of 500 cm?1 to 600 cm?1 in a light absorption spectrum.

Abstract: Provided are carbon nanotubes that allow effective utilization of the insides thereof as-synthesized, without undergoing opening formation treatment. The provided carbon nanotubes have not undergone opening formation treatment and exhibit a convex upward shape in a t-plot obtained from an adsorption isotherm.

Abstract: Provided are carbon nanotubes that allow effective utilization of the insides thereof as-synthesized, without undergoing opening formation treatment. The provided carbon nanotubes have not undergone opening formation treatment and exhibit a convex upward shape in a t-plot obtained from an adsorption isotherm.

Abstract: A substrate of the present invention for producing aligned carbon nanotube aggregates on a surface thereof is a substrate for producing aligned carbon nanotube aggregates on a surface thereof, the substrate for producing aligned carbon nanotube aggregates including: a metal base substrate; and carburizing prevention layers formed on both front and back surfaces of the metal base substrate, respectively.

Abstract: A production method in accordance with the present invention includes the steps of: providing a catalyst support layer by applying, to a substrate, a catalyst support layer coating agent obtained by dissolving in an organic solvent (i) an organometallic compound containing aluminum and/or a metal salt containing aluminum and (ii) a stabilizer for inhibiting a condensation polymerization reaction of the organometallic compound and/or the metal salt; providing a catalyst formation layer by applying, to the catalyst support layer, a catalyst formation layer coating agent obtained by dissolving in an organic solvent (a) an organometallic compound containing iron and/or a metal salt containing iron and (b) a stabilizer for inhibiting a condensation polymerization reaction of the organometallic compound and/or the metal salt; and growing an aligned carbon nanotube aggregate on the substrate by chemical vapor deposition (CVD).

Abstract: A production method in accordance with the present invention includes the steps of: providing a catalyst support layer by applying, to a substrate, a catalyst support layer coating agent obtained by dissolving in an organic solvent (i) an organometallic compound containing aluminum and/or a metal salt containing aluminum and (ii) a stabilizer for inhibiting a condensation polymerization reaction of the organometallic compound and/or the metal salt; providing a catalyst formation layer by applying, to the catalyst support layer, a catalyst formation layer coating agent obtained by dissolving in an organic solvent (a) an organometallic compound containing iron and/or a metal salt containing iron and (b) a stabilizer for inhibiting a condensation polymerization reaction of the organometallic compound and/or the metal salt; and growing an aligned carbon nanotube aggregate on the substrate by chemical vapor deposition (CVD).

Abstract: A substrate of the present invention for producing aligned carbon nanotube aggregates on a surface thereof is a substrate for producing aligned carbon nanotube aggregates on a surface thereof, the substrate for producing aligned carbon nanotube aggregates including: a metal base substrate; and carburizing prevention layers formed on both front and back surfaces of the metal base substrate, respectively.

Abstract: Provided are a method for producing a circular polarization separation sheet and an apparatus for coating layer formation, whereby a circular polarization separation sheet which selectively reflects a light in an entire visible light range is easily obtainable. A method for producing a circular polarization separation sheet including a step of obtaining on a substrate a photopolymerizable composition containing a liquid crystal compound, and a step of converting the coating layer into a resin layer having a cholesteric regularity, characterized in that the resin layer forming step includes: a selected ultraviolet light irradiation step (1) of irradiating the coating layer with a selected ultraviolet light having an illumination intensity of less than 10 mW/cm2 under a temperature at 20 to 40° C. for 0.