151results about "Nanostructure manipulation" patented technology

An aggregate of carbon-based fine structures in which a plurality of carbon-based fine structures are collected, wherein respective carbon-based fine structures are oriented in the same direction. The above aggregate of carbon-based fine structures is an aggregate of a plurality of carbon-based fine structures in a state they are pulled by one another with strong interaction, and has such a length that allows the improvement of the handleability and workability thereof.

The present invention relates to covalently bonded fullerene-functionalized carbon nanotubes (CBFFCNTs), a method and an apparatus for their production and to their end products. CBFFCNTs are carbon nanotubes with one or more fullerenes or fullerene based molecules covalently bonded to the nanotube surface. They are obtained by bringing one or more catalyst particles, carbon sources and reagents together in a reactor.

The diameter of carbon nanotubes grown by chemical vapor deposition is controlled independent of the catalyst size by controlling the residence time of reactive gases in the reactor.

Example embodiments relate to methods of manufacturing and transferring a larger-sized graphene layer. A method of transferring a larger-sized graphene layer may include forming a graphene layer, a protection layer, and an adhesive layer on a substrate and removing the substrate. The graphene layer may be disposed on a transferring substrate by sliding the graphene layer onto the transferring substrate.

A semiconductor nanocrystal-polymer composite including a semiconductor nanocrystal, a polymer comprising a plurality of carboxylate anion groups (—COO⁻) bindable to a surface of the semiconductor nanocrystal, and a metal cation bindable to a carboxylate anion group of the plurality of carboxylate anion groups.

A method of preparing a patterned carbon nanotube array a patterned carbon nanotube array prepared thereby are provided. The method includes forming carbon nanotubes in channels of porous templates, arranging the templates in a predetermined pattern on a substrate and selectively removing the templates to expose the carbon nanotubes.

It relates to high purity single-walled carbon nanotubes having controlled diameter, useful as industrial materials, including high-strength carbon wire rods, particularly uniform single-walled carbon nanotubes having diameter fallen in a range of from 1.0 to 2.0 nm, and a method for producing the same efficiently, in large amount and inexpensively. The single-walled carbon nanotube obtained is characterized in that its diameter is fallen in a range of from 1.0 to 2.0 nm, and an intensity ratio IG/ID between G-band and D-band in a Raman spectrum is 200 or more. Furthermore, those single-walled carbon nanotubes are synthesized by a gas-phase flow CVD method that uses a saturated aliphatic hydrocarbon which is liquid at ordinary temperature as a first carbon source and an unsaturated aliphatic hydrocarbon which is gas at ordinary temperature as a second carbon source.

Bundled carbon nanotubes are disentangled and dispersed using the principles of extreme pressure reduction of fluids carrying the bundled nanotubes. They are added to a high pressure fluid upstream of a chamber operated at much lower pressure. These high-low pressure ratios are preferably at least 100:1. As the high pressure fluid enters the lower pressure chamber it violently expands causing separation and disentanglement of the bundled carbon fibers. To further assist in this disentanglement a nozzle may be used at the inlet to the lower pressure chamber to direct the high pressure fluid against a hardened anvil in the chamber. This impact further aids disentanglement. Coating the nanotubes with a dispersant also improves disentanglement.

The present invention relates to a method for transferring graphene using a hot press, comprising: a step of contacting graphene, having a thermal-releasable sheet attached thereto, with a target substrate; and a step of pressing and heating the graphene having the thermal-releasable sheet attached thereto and the target substrate using the upper press and lower press of a hot press so as to separate the thermal-releasable sheet and the graphene and transfer the separated graphene to the target substrate. The present invention also relates to a graphene-transfer hot press apparatus for said transfer process.

A manufacturing and controlling method of a flexible micro-driver for controlling micro-nano particles includes the steps of manufacturing a patterning template of magnetic micro-nano particles, coating the surface of a nonmagnetic substrate with polymers, making the polymers make contact with and embedded in the micro-nano particles on the surface of the patterning template to lift the patterning template and stretch the polymers into a mushroom-shaped micro-nano column array, heating the patterning template to make the patterned magnetic micro-nano particles disengaged from a hydrosol adhesion layer to obtain a flexible mushroom-shaped micro-nano column array with magnetic micro-nano particles at the top end, namely, the flexible micro-driver, making to-be-controlled micro-nano particles drip onto the surface of the flexible mushroom-shaped micro-nano column array, adjusting and controlling the position and the horizontal/vertical movement speed of a magnet under the nonmagnetic substrate so that the translation, grabbing and jumping of the micro-nano particles can be controlled, and adjusting and controlling the positions and rotating speeds of a pair of magnets on the nonmagnetic substrate so that the rotating of the micro-nano particles can be controlled. The flexible micro-driver is easy to manufacture and good in controllability.

Provided is CNTs on which TiO₂ is uniformly coated. The method includes: functionalizing CNTs with hydrophilic functional groups; mixing the CNTs functionalized with hydrophilic functional groups in a solution that contains with TiO₂ precursors; refining TiO₂ precursor-coated CNTs from the solution in which the CNTs and the TiO₂ precursors are mixed; and heat treating the refined TiO₂-coated CNTs. The TiO₂-coated CNTs formed in this manner simultaneously retain the characteristics of CNTs and TiO₂ nanowires, and thus, can be applied to solar cells, field emission display devices, gas sensors, or optical catalysts.

Provided is a metal matrix nanocomposite comprising: (a) a metal or metal alloy as a matrix material; and (b) multiple graphene sheets that are dispersed in said matrix material, wherein said multiple graphene sheets are substantially aligned to be parallel to one another and are in an amount from 0.1% to 95% by volume based on the total nanocomposite volume; wherein the multiple graphene sheets contain single-layer or few-layer graphene sheets selected from pristine graphene, graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, doped graphene, chemically functionalized graphene, or a combination thereof and wherein the chemically functionalized graphene is not graphene oxide. The metal matrix exhibits a combination of exceptional tensile strength, modulus, thermal conductivity, and/or electrical conductivity.

The invention provides a preparation method for a forest nanostructure and a regulation and control method for the forest nanostructure. The preparation method for the forest nanostructure comprises the following steps: S1. employing a mixture comprising a couplant and a polymer to form a film layer on a substrate; and carrying out plasma bombardment on the film layer, thereby forming the forest nanostructure. Through carrying out bombardment on a polymer layer by adopting plasma, part of products produced by the polymer can be repolymerized to form a forest nanostructure; and the couplant isadded on the basis of the polymer, during plasma bombardment, groups of the polymer and the couplant in the film layer are activated, organic groups and inorganic groups of the couplant are interconnected with organic groups and inorganic groups of the polymer separately, and meanwhile, the organic groups of the couplant are in a crosslinked action, so that active groups produced from plasma bombardment are repolymerized, an original mixture layer disappears, and similarly, the forest nanostructure is formed.

The invention discloses a method for preparing single-walled carbon nanotubes in oriented arrangement with a solution standing method. A substrate with parallel electrodes on the surface obliquely stands in colloidal liquid obtained by mixing single-walled carbon nanotubes, deionized water, a surfactant and an organic polymer, and due to the size effect of the parallel electrodes on the carbon nanotubes, the carbon nanotubes can be arranged between the parallel electrodes in an oriented mode. Compared with a traditional chemical vapor deposition method for preparing orientated carbon nanotubes in vertical arrangement, operation is easy, and the carbon nanotubes in horizontal oriented arrangement are prepared and can be applied to field-effect tubes, field emitters and chemical sensors.

The movement-free bending method means the one of deformation methods for a one- or two-dimensional nanostructures using an ion beam capable of bending and deforming them and furthermore, changing a bending direction without requiring a motion such as a rotation of the nanostructures. The present invention affords a movement-free bending method for deforming the nanostructure 20 having the one-dimensional or two-dimensional shape by irradiating the ion beam 10, wherein a bending direction of the nanostructure 20 is controlled depending on energy of the ion beam 10 or a thickness of the nanostructure 20.

The invention provides a single aligned carbon nano tube jet-printing arrangement method. The method comprises the steps that a substrate is modified with octadecyltrichlorosilane (OTS), so that the surface of the substrate has a hydrophobic property; precise control over the thin film position, the aligned density and patterning of aligned carbon nano tubes is achieved on the functional hydrophobic substrate through ink-jet printing, and a carbon nano tube thin film which is uniform in density and consistent in orientation and has different patterns is arranged. By means of the method, the carbon nano tube arrangement area of the size from several micrometers to the wafer level can be effectively controlled; the problems can be solved that in all existing arrangement methods, the arrangement position, the arrangement orientation, the arrangement density and the thin film array patterning of one-dimensional nano materials on the substrate cannot be efficiently and precisely controlled;the method can be widely used for preparing various high-performance photoelectric devices, logic circuits and functional thin films based on the carbon nano tubes, and the method also has a wide application prospect in the field of flexible wearable nano devices.

The present invention relates to a method for producing zeta positive hydrogenated nanodiamond particles, and to a method for producing zeta positive single digit hydrogenated nanodiamond dispersions. The present invention further relates to zeta positive hydrogenated nanodiamond powder and zeta positive single digit hydrogenated nanodiamond dispersion.