The present invention relates to using modified cellulose (e.g., nitrated cellulose) for separating carbon nanotubes (CNTs). A raw mixture of CNTs of different structures or chiral angles (chiralities), can be separated into fractions, based on their selective permeation through a separation column filled with nitrated cellulose. The present invention is particularly useful in separating semiconducting CNTs and metallic CNTs.

The present invention relates to using modified cellulose (e.g., nitrated cellulose) for separating carbon nanotubes (CNTs). A raw mixture of CNTs of different structures or chiral angles (chiralities), can be separated into fractions, based on their selective permeation through a separation column filled with nitrated cellulose. The present invention is particularly useful in separating semiconducting CNTs and metallic CNTs.

A single-walled carbon nanotube separation apparatus includes: a separation tank accommodating a single-walled carbon nanotube dispersion liquid containing: metallic single-walled carbon nanotubes; and semiconducting single-walled carbon nanotubes; a first electrode and a second electrode that are installed in the separation tank; and a partition wall installed between the first electrode and the second electrode in the separation tank and below the separation tank in a height direction thereof.

A hydrophilic graphitic material is provided that may be formed by heating a graphitic material to a temperature between about 150° C. to about 1400° C. for an extended period of time under an inert atmosphere. Annealing CNT film at 500 to 1400 removes amorphous carbon to produce purified CNT film. The purified CNT film can be further densified with the treatment of alkylphosphonic acid or alkyldiphophonic acid and heating to produce a hydrophilic, densified CNT film which is mechanically robust and does not adhere to other solid surfaces. These films can be used as filtration membranes with superior membrane fouling resistance among other uses.

A hydrophilic graphitic material is provided that may be formed by heating a graphitic material to a temperature between about 150° C. to about 1400° C. for an extended period of time under an inert atmosphere. Annealing CNT film at 500 to 1400 removes amorphous carbon to produce purified CNT film. The purified CNT film can be further densified with the treatment of alkylphosphonic acid or alkyldiphophonic acid and heating to produce a hydrophilic, densified CNT film which is mechanically robust and does not adhere to other solid surfaces. These films can be used as filtration membranes with superior membrane fouling resistance among other uses.

A magnet module used for producing a carbon nanotube dispersion liquid, comprising: a pipe portion having a first opening connected to a shearing module, and a second opening at both ends; and a magnet disposed in the pipe portion, wherein a medium liquid containing the carbon nanotube defibrated by the shearing module is supplied through the first opening, and after a ferromagnetic impurity attached to the carbon nanotube is attracted to the magnet and removed, the medium liquid is discharged from the second opening.

A magnet module used for producing a carbon nanotube dispersion liquid, comprising: a pipe portion having a first opening connected to a shearing module, and a second opening at both ends; and a magnet disposed in the pipe portion, wherein a medium liquid containing the carbon nanotube defibrated by the shearing module is supplied through the first opening, and after a ferromagnetic impurity attached to the carbon nanotube is attracted to the magnet and removed, the medium liquid is discharged from the second opening.

The present disclosure generally relates to compositions and devices for, e.g., hosting qubits, and processes of use. In an embodiment, a quantum device is provided. The quantum device includes a composition, the composition comprising a first component comprising a nanotube and a second component comprising a compound, the compound comprising a metal-bound cyclic tetrapyrrole, an ion thereof, or a combination thereof. In another embodiment, a process for controlling a quantum spin is provided. The process includes cooling a composition described herein to a temperature of about 1 K or more, applying a voltage to the composition, introducing a magnetic field to the composition, and introducing microwave radiation to the composition.

The present disclosure generally relates to compositions and devices for, e.g., hosting qubits, and processes of use. In an embodiment, a quantum device is provided. The quantum device includes a composition, the composition comprising a first component comprising a nanotube and a second component comprising a compound, the compound comprising a metal-bound cyclic tetrapyrrole, an ion thereof, or a combination thereof. In another embodiment, a process for controlling a quantum spin is provided. The process includes cooling a composition described herein to a temperature of about 1 K or more, applying a voltage to the composition, introducing a magnetic field to the composition, and introducing microwave radiation to the composition.

A method of making carbon nanotubes is provided, the method includes depositing a catalyst layer on a substrate, placing the substrate having the catalyst layer in a reaction furnace, heating the reaction furnace to a predetermined temperature, introducing a carbon source gas and a protective gas into the reaction furnace to grow a first carbon nanotube segment structure comprising a plurality of metallic carbon nanotube segments, and applying a pulsed electric field to grow a second carbon nanotube segment structure from the plurality of metallic carbon nanotube segments, where the pulsed electric field is a periodic electric field including a plurality of positive electric field pulses and a plurality of negative electric field pulses alternately arranged, and the second carbon nanotube segment structure includes a plurality of semiconducting carbon nanotube segments.