The present disclosure provides a method for preparing a self-floating transparent nano ultrathin film. According to the present disclosure, the MXene film layer and the nano ultrathin film layer are sequentially subjected to suction filtration on the substrate material by utilizing a vacuum suction filtration technology, and thus a double-film structure is loaded on the substrate material; then an oxidant is subjected to oxidizing and bubbling on the MXene film layer in a permeation way, and thus the substrate material and the nano ultrathin film layer can be separated in a physical isolating manner. Finally, the nano ultrathin film is completely separated in a liquid phase floating separation manner. The nano ultrathin film prepared by the method provided by the present disclosure has a specific thickness and light transmittance through different loading capacities, and the substrate material can be repeatedly utilized.

A field effect transistor and a sensor using the field effect transistor is provided. The field effect transistor can be manufactured so as to have uniform properties by simple steps at low costs, and can stably detect, when used as a sensor, a very small amount of analyte with a high sensitivity while the properties are hardly deteriorated. A channel of the field effect transistor is constituted by a single-walled carbon nanotube thin film that is grown, by a chemical vapor deposition method, using particles of a nonmetallic material as growth nuclei, the nonmetallic material containing 500 mass ppm or less metallic impurities that contain a metal and its compounds.

Exemplary Embodiments of the invention address the problem of providing semiconductor single-layer carbon nanotubes in which the light emission energy thereof is lowered by approximately 300 meV, and a method for manufacturing the same. In one embodiments of the invention, by applying a method for directly irradiating semiconductor single-layer carbon nanotubes with ultraviolet light in atmospheric air, ozone is generated in the atmosphere, a gram amount of oxygen atoms is introduced to the semiconductor single-layer carbon nanotubes, and semiconductor single-layer carbon nanotubes in which the light emission energy thereof is lowered by approximately 300 meV.

The present invention relates to carbon nanotubes that are excellent in dispersibility and a process for producing the carbon nanotubes. The carbon nanotubes according to the present invention each comprise a wall that comprises a parallel portion and a narrowed portion having a tube outer diameter that is not more than 90% of a tube outer diameter of the parallel portion. Thus, the carbon nanotubes are readily dispersible owing to a high abundance ratio of easily-breaking portions.

A carbon nanotube fiber is provided that that has excellent properties such as electrical conductivity, thermal conductivity, and mechanical characteristics. The carbon nanotube fiber includes an assembly of a plurality of carbon nanotubes. The plurality of carbon nanotubes includes one or more carbon nanotubes having at least partially collapsed structures. Furthermore, a method for producing a carbon nanotube fiber is provided that includes spinning a carbon nanotube dispersion liquid containing a plurality of carbon nanotubes including one or more carbon nanotubes having at least partially collapsed structures, a dispersant, and a solvent by extruding the carbon nanotube dispersion liquid into a coagulant liquid.

Provided herein is a nanopore structure, which in one aspect is a “carbon nanotube porin”, that comprises a short nanotube with an associated lipid coating. Also disclosed are compositions and methods enabling the preparation of such nanotube/lipid complexes. Further disclosed is a method for therapeutics delivery that involves a drug delivery agent comprising a liposome with a NT loaded with a therapeutic agent, introducing the therapeutic agent into a cell or a tissue or an organism; and subsequent release of the therapeutic agents into a cell.

Achieved is a coating floor material using a carbon nanotube, which has excellent finishing properties and shows high conductivity even when a cured coating film is at 50 V. This coating floor material contains: a room temperature curable resin, a single-walled carbon nanotube, a wetting dispersant, a leveling agent, and a defoaming agent, wherein the wetting dispersant is a polymer salt containing an acidic group and an amino group.

Carbon nanotubes (CNTs) exhibit high electrical and thermal conductivity and good mechanical properties, making them suitable fillers for composites. Their effectiveness as a filler is affected by their state of aggregation. Novel ordered helical wrapping of poly (methyl methacrylate) (PMMA) has been achieved on single wall carbon nanotubes (SWNTs). This carbon nanotube composite not only thwarts CNT aggregation, but also may be successfully leveraged for applications such as electrical energy storage and mechanical reinforcement.

The present invention discloses single-walled carbon nanotubes horizontal arrays with ultra-high density and the preparation method. The method comprises the following steps: loading a catalyst on a single crystal growth substrate; after annealing, introducing hydrogen into a chemical vapor deposition system to conduct a reduction reaction of the catalyst; and maintaining the introduction of the hydrogen to conduct the orientated growth of a single-walled carbon nanotube. The density of the ultra-high density single-walled carbon nanotube horizontal array obtained by this method exceeds 130 tubes/micrometer, and an electrical performance test is performed on the prepared ultra-high density single-walled carbon nanotube horizontal array shows a high on-current density of 380 μA/μm, and the transconductance of 102.5 μS/μm.

Apparatuses and methods for preparing carbon nanostructure sheets are provided. The apparatuses may include a casting body including a substrate configured to move along a first direction, a slurry reservoir configured to contain a slurry, a dispenser connected to the slurry reservoir and configured to dispense the slurry onto a surface of the substrate and a doctoring member that extends in a second direction traversing the first direction and that is positioned above the surface of the substrate. The slurry may include carbon nanostructures, and/or one or more functional materials. The doctoring member may be spaced apart from the surface of the substrate by a predetermined distance.