556results about "Specific nanostructure formation" patented technology

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.

This invention provides an aligned single-layer carbon nanotube bulk structure, which comprises an assembly of a plurality of aligned single-layer carbon nanotube and has a height of not less than 10 μm, and an aligned single-layer carbon nanotube bulk structure which comprises an assembly of a plurality of aligned single-layer carbon nanotubes and has been patterned in a predetermined form. This structure is produced by chemical vapor deposition (CVD) of carbon nanotubes in the presence of a metal catalyst in a reaction atmosphere with an oxidizing agent, preferably water, added thereto. An aligned single-layer carbon nanotube bulk structure, which has realized high purify and significantly large scaled length or height, its production process and apparatus, and its applied products are provided.

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.

The present invention relates to a process of producing composite materials by a sol/gel-process, comprising carbon nanoparticles and organic polymer material. The invention further relates to composite materials, which are manufactured with the use of said sol/gel technology.

Methods of ex situ synthesis of graphene, graphene oxide, reduced graphene oxide, other graphene derivative structures and nanoparticles useful as polishing agents are disclosed. Compositions and methods for polishing, hardening, protecting, adding longevity to, and lubricating moving and stationary parts in devices and systems, including, but not limited to, engines, turbos, turbines, tracks, races, wheels, bearings, gear systems, armor, heat shields, and other physical and mechanical systems employing machined interacting hard surfaces through the use of nano-polishing agents formed in situ from lubricating compositions and, in some cases, ex situ and their various uses are also disclosed.

An apparatus is provided for growing high aspect ratio emitters (26) on a substrate (13). The apparatus comprises a housing (10) defining a chamber and includes a substrate holder (12) attached to the housing and positioned within the chamber for holding a substrate having a surface for growing the high aspect ratio emitters (26) thereon. A heating element (17) is positioned near the substrate and being at least one material selected from the group consisting of carbon, conductive cermets, and conductive ceramics. The housing defines an opening (15) into the chamber for receiving a gas into the chamber for forming the high aspect ratio emitters (26).

This invention relates to a method of manufacturing a graphene or graphene oxide/nanoparticle hybrid material and a graphene/nanoparticle hybrid material manufactured thereby, wherein the hybrid material can be easily, rapidly and eco-friendly synthesized while minimizing the use of chemicals and thermal treatment because of electrostatic self-assembly properties of a biomaterial. This method includes preparing nanoparticles, a biomaterial solution and a graphene oxide solution, mixing the nanoparticles with the biomaterial solution to form biomaterial-coated nanoparticles, mixing the biomaterial-coated nanoparticles with the graphene oxide solution to obtain a graphene oxide/nanoparticle hybrid material, and reducing the graphene oxide/nanoparticle hybrid material to obtain a graphene/nanoparticle hybrid material.

Provided is a method of growing carbon nanotubes (CNTs) by forming a catalyst layer that is used to facilitate growth of CNTs to have a multi-layer structure; and injecting a carbon-containing gas to the catalyst layer to grow CNTs, and light emitting devices fabricated by incorporating the CNTs grown.

A vacuum chamber includes a radical beam irradiation part and a nanoparticle beam irradiation part. A substrate is held by a substrate holding part. The nanoparticle beam irradiation part irradiates the substrate with a beam of metal nanoparticles serving as a catalyst to form the catalyst on the substrate. Thereafter, the radical beam irradiation part generates a plasma from a source gas to irradiate the substrate with a beam of generated neutral radical species to grow a carbon nanotube on the substrate. The provision of an aperture in the radical beam irradiation part allows a relatively high degree of vacuum of 10⁻⁵ Torr to 10⁻³ Torr to be maintained in the vacuum chamber if the generation of the plasma involves a high pressure.

A process for producing a carbon nanomaterial, including fluidizing a carbon raw material, a catalyst and a fluidizing material in a fluidized bed reactor to produce the carbon nanomaterial, wherein the fluidizing material is a carbon material. A carbon nanomaterial production system for producing a carbon nanomaterial including a fluidized bed reactor for fluidizing a car-bon raw material, a catalyst and a fluidizing material to carry out the reaction thereof, a carbon raw material feeding device for feeding the carbon raw material to the fluidized bed reactor, a catalyst feeding device for feeding the catalyst to the fluidized bed reactor, and a recovering device for recovering the produced carbon nanomaterial from the fluidized bed reactor, wherein a part of the recovered carbon nanomaterial is transferred to the catalyst feeding device and used as the fluidizing material.

Disclosed is a method for fabricating graphene ribbons which are high-functional carbon materials. Provided a method of fabricating graphene ribbons, including (a) preparing a carbon structure in which a graphene ribbon is spirally grown (a graphene helix), revealing a tube shape, and (b) applying energy to unroll the graphene helix into the graphene ribbons.

A carbon nanosphere has at least one opening. The carbon nanosphere is obtained by preparing a carbon nanosphere and treating it with an acid to form the opening. The carbon nanosphere with at least one opening has higher utilization of a surface area and electrical conductivity and lower mass transfer resistance than a conventional carbon nanotube, thus allowing for higher current density and cell voltage with a smaller amount of metal catalyst per unit area of a fuel cell electrode.

A method for synthesizing carbon nanotubes (CNT) comprises the steps of providing a growth chamber, the growth chamber being heated to a first temperature sufficiently high to facilitate a growth of carbon nanotubes; and passing a substrate through the growth chamber; and introducing a feed gas into the growth chamber pre-heated to a second temperature sufficient to dissociate at least some of the feed gas into at least free carbon radicals to thereby initiate formation of carbon nanotubes onto the substrate.

A method is described for building a mechanosynthesis tool intended to be used for the molecularly precise fabrication of physical structures—as for example, diamond structures. An exemplar tool consists of a bulk-synthesized dimer-capped triadamantane tooltip molecule which is initially attached to a deposition surface in tip-down orientation, whereupon CVD or equivalent bulk diamond deposition processes are used to grow a large crystalline handle structure around the tooltip molecule. The large handle with its attached tooltip can then be mechanically separated from the deposition surface, yielding an integral finished tool that can subsequently be used to perform diamond mechanosynthesis in vacuo. The present disclosure is the first description of a complete tool for positional diamond mechanosynthesis, along with its method of manufacture. The same toolbuilding process may be extended to other classes of tooltip molecules, other handle materials, and to mechanosynthetic processes and structures other than those involving diamond.

The invention relates to imparting surfaces with nanometer sized structures that provide bactericidal properties to the surface and devices. In one embodiment, the present invention provides a bactericidal surface with nanometer sized pillars created by imprinting a softened polymer surface with a mold. In another embodiment, the nanometer sized pillars are part of a medical device with antibacterial properties.

An anisotropically elongated thermoelectric nanocomposite includes a thermoelectric material.

Provided is a method of forming a micropattern according to an aspect of the present invention. The method of forming a micropattern may include forming an organic wire or organic-inorganic hybrid wire mask pattern having a circular or elliptical cross section on a substrate, forming a material layer on an entire surface of the substrate having the organic wire or organic-inorganic hybrid wire mask pattern formed thereon, and removing the organic wire or organic-inorganic hybrid wire mask pattern from the substrate to allow only the material layer on a portion of the substrate having no organic wire or organic-inorganic hybrid wire mask pattern formed thereon to be remained.

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.

Small structures are formed by applying to a substrate a structural material and a layer of a sacrificial material having a lower surface energy than the structural material, to form an intermediate product. The substrate is then heated to a temperature at which the sacrificial material evaporates or sublimes and the structural material is mobilized. The sacrificial material is permitted to evaporate or sublime, an area of the substrate covered by the sacrificial material to diminish, and the structural material to agglomerate on the remaining sacrificial material to form a structure.

In one aspect, the present invention provides nano-scale heaters, such as nano-scale thermoacoustic loudspeakers comprising suspended metal nanobridges prepared using atomic layer deposition (ALD). The loudspeakers of the invention are capable of producing audible sound when stimulated with an electrical current or other energetic stimulus. In another aspect, the present invention provides methods of preparing and using such nanodevices.