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.

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.

Disclosed herein are materials and a micro-LED display with carbon-based light-emitting materials, carbon quantum dots, that are made by a solvothermal synthesis of a mixture of aromatic amino acid, 3,4-dihydroxy-L-phenylalanine (LDOPA), and urea in dimethylformamide (DMF). The mixture is heated in a sealed pressure reactor at a temperature, ranging from 120 degrees Celsius to 350 degrees Celsius, for 4-24 hours. The product is then purified to collect the solid powder. The purified CDs can be dissolved in an acrylate monomer solution or a polymer solution for material delivery and curing process on a target substrate for the applications, including light-emitting devices or sensors.

Disclosed herein are materials and a micro-LED display with carbon-based light-emitting materials, carbon quantum dots, that are made by a solvothermal synthesis of a mixture of aromatic amino acid, 3,4-dihydroxy-L-phenylalanine (LDOPA), and urea in dimethylformamide (DMF). The mixture is heated in a sealed pressure reactor at a temperature, ranging from 120 degrees Celsius to 350 degrees Celsius, for 4-24 hours. The product is then purified to collect the solid powder. The purified CDs can be dissolved in an acrylate monomer solution or a polymer solution for material delivery and curing process on a target substrate for the applications, including light-emitting devices or sensors.

Room temperature phosphorescent metal-free carbon dots (CDs) embedded in a continuous SiO.sub.2 network (CDs@SiO.sub.2) are made by a method comprising in part grinding biomass and a source of SiO.sub.2 into a powder and soaking the powder with an acidic aqueous solution; washing the powder with deionized water; reacting the powder with an alkaline aqueous solution to form an aqueous solution of CDs from the biomass and Na.sub.2SiO.sub.3 from the source of SiO.sub.2; lowering the pH of the aqueous solution to a value sufficient to cause gelation; and aging the aqueous solution so that the Na.sub.2SiO.sub.3 forms mono-silicic acid (H.sub.4SiO.sub.4), which polymerizes to form a continuous SiO.sub.2 network composed of Si—O tetrahedrons (gel). The method can further comprise calcination of the CDs, wherein the CDs are multi-confined by a continuous SiO.sub.2 network composed of Si—O tetrahedrons. The metal-free CDs are useful in anti-counterfeiting encryption and fingerprint detection systems.

Room temperature phosphorescent metal-free carbon dots (CDs) embedded in a continuous SiO.sub.2 network (CDs@SiO.sub.2) are made by a method comprising in part grinding biomass and a source of SiO.sub.2 into a powder and soaking the powder with an acidic aqueous solution; washing the powder with deionized water; reacting the powder with an alkaline aqueous solution to form an aqueous solution of CDs from the biomass and Na.sub.2SiO.sub.3 from the source of SiO.sub.2; lowering the pH of the aqueous solution to a value sufficient to cause gelation; and aging the aqueous solution so that the Na.sub.2SiO.sub.3 forms mono-silicic acid (H.sub.4SiO.sub.4), which polymerizes to form a continuous SiO.sub.2 network composed of Si—O tetrahedrons (gel). The method can further comprise calcination of the CDs, wherein the CDs are multi-confined by a continuous SiO.sub.2 network composed of Si—O tetrahedrons. The metal-free CDs are useful in anti-counterfeiting encryption and fingerprint detection systems.

A substrate comprises carbon nanotubes, oriented largely parallel in a direction away from the substrate. In a plane along a surface of said substrate carbon nanotubes are formed in first cells of a connected structure of carbon nanotubes. Said first cells formed within a second structure of second cells, the carbon nanotubes are thereby patterned in a structure of first cells, nested in a structure of second cells. The first cells comprise at least one opening, without carbon nano tubes, to provide access to the surface of the substrate. Second cells are separated from each other by a trench to prevent carbon nanotubes of a second cell from contacting carbon nanotubes of another second cell across a first gap formed by said trench. The trench provides access to the substrate.

A substrate comprises carbon nanotubes, oriented largely parallel in a direction away from the substrate. In a plane along a surface of said substrate carbon nanotubes are formed in first cells of a connected structure of carbon nanotubes. Said first cells formed within a second structure of second cells, the carbon nanotubes are thereby patterned in a structure of first cells, nested in a structure of second cells. The first cells comprise at least one opening, without carbon nano tubes, to provide access to the surface of the substrate. Second cells are separated from each other by a trench to prevent carbon nanotubes of a second cell from contacting carbon nanotubes of another second cell across a first gap formed by said trench. The trench provides access to the substrate.

Methods for making porous nanotube fabrics are disclosed. Within the methods of the present disclosure, a porogen-loaded nanotube application solution is formed by combining a first volume of nanotube elements with a second volume of fuel material in a liquid medium to form a porogen-loaded nanotube application solution. In some aspects of the present disclosure, a third volume of oxidizer material is also combined into the liquid medium. A porogen-loaded nanotube fabric is formed by depositing the porogen-loaded nanotube application solution. In some aspects of the present disclosure, the fuel material within the porogen-loaded nanotube application solution will react with oxidizer material when heat is applied to a sufficient degree and volatize. The off-gassed fuel material will then leave behind voids in the nanotube fabric, rendering the fabric porous.

Methods for making porous nanotube fabrics are disclosed. Within the methods of the present disclosure, a porogen-loaded nanotube application solution is formed by combining a first volume of nanotube elements with a second volume of fuel material in a liquid medium to form a porogen-loaded nanotube application solution. In some aspects of the present disclosure, a third volume of oxidizer material is also combined into the liquid medium. A porogen-loaded nanotube fabric is formed by depositing the porogen-loaded nanotube application solution. In some aspects of the present disclosure, the fuel material within the porogen-loaded nanotube application solution will react with oxidizer material when heat is applied to a sufficient degree and volatize. The off-gassed fuel material will then leave behind voids in the nanotube fabric, rendering the fabric porous.