386 results about "BCN nanotube" patented technology

A method and apparatus for catalytic production of carbon nanotubes. Catalytic particles are exposed to different process conditions at successive stages wherein the catalytic particles do not come in contact with reactive (catalytic) gases until preferred process conditions have been attained, thereby controlling the quantity and form of carbon nanotubes produced. The method also contemplates methods and apparatus which recycle and reuse the gases and catalytic particulate materials, thereby maximizing cost efficiency, reducing wastes, reducing the need for additional raw materials, and producing the carbon nanotubes, especially SWNTs, in greater quantities and for lower costs.

A method is described for catalyst-induced growth of carbon nanotubes, nanofibers, and other nanostructures on the tips of nanowires, cantilevers, conductive micro/nanometer structures, wafers and the like. The method can be used for production of carbon nanotube-anchored cantilevers that can significantly improve the performance of scaning probe microscopy (AFM, EFM etc). The invention can also be used in many other processes of micro and/or nanofabrication with carbon nanotubes/fibers. Key elements of this invention include: (1) Proper selection of a metal catalyst and programmable pulsed electrolytic deposition of the desired specific catalyst precisely at the tip of a substrate, (2) Catalyst-induced growth of carbon nanotubes/fibers at the catalyst-deposited tips, (3) Control of carbon nanotube/fiber growth pattern by manipulation of tip shape and growth conditions, and (4) Automation for mass production.

A solar receiver includes a heat absorbing element having an outer surface and an inner surface opposite the outer surface and a first coating including a carbon nanotube-infused fiber material in surface engagement with and at least partially covering the outer surface of the heat absorbing element. Solar radiation incident onto the first coating is received, absorbed, and converted to heat energy, and the heat energy is transferred from the first coating to the heat absorbing element. A multilayer coating for a solar receiver device includes a first coating that includes a CNT-infused fiber material and an environmental coating disposed on the first coating.

The present invention relates to a method for continuous production of carbon nanotubes in a nano-agglomerate fluidized bed, which comprises the following steps: loading transition metal compounds on a support, obtaining supported nanosized metal catalysts by reducing or dissociating, catalytically decomposing a carbon-source gas, and growing carbon nanotubes on the catalyst support by chemical vapor deposition of carbon atoms. The carbon nanotubes are 4˜100 nm in diameter and 0.5˜1000 μm in length. The carbon nanotube agglomerates, ranged between 1˜1000 μm, are smoothly fluidized under 0.005 to 2 m/s superficial gas velocity and 20-800 kg/m³ bed density in the fluidized-bed reactor. The apparatus is simple and easy to operate, has a high reaction rate, and it can be used to produce carbon nanotubes with high degree of crystallization, high purity, and high yield.

Substantially enhanced field emission properties are achieved by using a process of covering a non-adhesive material (for example, paper, foam sheet, or roller) over the surface of the CNTs, pressing the materiel using a certain force, and removing the material.

A method for simultaneously producing carbon nanotubes and hydrogen according to the present invention is a method for simultaneously producing carbon nanotubes and hydrogen, in which using a carbon source containing carbon atoms and hydrogen atoms and being decomposed in a heated state, and a catalyst for producing carbon nanotubes and H₂ from the carbon source, the above carbon nanotubes are synthesized on a support in a heated state, placed in a reactor, and simultaneously, the above H₂ is synthesized from the above carbon source, the method comprising a synthesis step of flowing a source gas comprising the above carbon source over the above support, on which the above catalyst is supported, to synthesize the above carbon nanotubes on the above support and simultaneously synthesize the above H₂ in a gas flow.

An apparatus, system, and method are disclosed for a carbon nanotube templated battery electrode. The apparatus includes a substrate, and a plurality of catalyst areas extending upward from the substrate, the plurality of catalyst areas forming a patterned frame. The apparatus also includes a carbon nanotube forest grown on each of the plurality of catalyst areas and extending upward therefrom such that a shape of the patterned frame is maintained, and a coating attached to each carbon nanotube in the carbon nanotube forest, the coating formed of an electrochemically active material. The system includes the apparatus, and a particulate cathode material distributed evenly across the apparatus such that the particulate cathode material fills the passages, a current collector film formed on top of the particulate cathode material, and a porous spacer disposed between the apparatus and the cathode.

The invention relates to a method for synthesis of carbon nanotubes of the highest carbon purity by the process of vapour phase chemical deposition. The nanotubes produced can be used to advantage in all know applications of carbon nanotubes.

The invention discloses a method for preparing a CNT/LDH compound. The CNT/LDH compound is obtained through connecting hydroxy groups and carboxylic groups to the surface of CNTs through acidifying, adding metal salts and an alkaline substance to an aqueous dispersion of the CNTs, and forming an LDH in an in situ mode. The method of the invention has the advantages of simplicity, no need of a high temperature and low cost; and in the prepared CNT/LDH compound, the CNTs are uniformly dispersed in the LDH, and the composition and the structure are controllable. The prepared CNT/LDH compound which well preserves the layered structure of the LDH and effectively improves the dispersibility of the CNTs allows the sheet peeling of the LDH and the uniform dispersion of the CNTs to be easily realized when the CNT/LDH compound is applied to a polymer matrix.

The present invention is directed to the creation of macroscopic materials and objects comprising aligned nanotube segments. The invention entails aligning single-wall carbon nanotube (SWNT) segments that are suspended in a fluid medium and then removing the aligned segments from suspension in a way that macroscopic, ordered assemblies of SWNT are formed. The invention is further directed to controlling the natural proclivity or nanotube segments to self assemble into or ordered structures by modifying the environment of the nanotubes and the history of that environment prior to and during the process. The materials and objects are “macroscopic” in that they are large enough to be seen without the aid of a microscope or of the dimensions of such objects. These macroscopic ordered SWNT materials and objects have the remarkable physical, electrical, and chemical properties that SWNT exhibit on the microscopic scale because they are comprised of nanotubes, each of which is aligned in the same direction and in contact with its nearest neighbors. An ordered assembly of closest SWNT also serves as a template for growth of more and larger ordered assemblies. An ordered assembly further serves as a foundation for post processing treatments that modify the assembly internally to specifically enhance selected material properties such as shear strength, tensile strength, compressive strength, toughness, electrical conductivity, and thermal conductivity.

Provided is a manufacturing apparatus for a carbon nanotube, including: at least two electrodes whose tips are opposed to each other, and a power supply that applies a voltage between the two electrodes to generate discharge plasma in a discharge area between the two electrodes. By using a porous carbonaceous material for at least one of the two electrodes, it is possible to provide a manufacturing apparatus and method for a carbon nanotube, which are capable of manufacturing at a low cost the carbon nanotube that is inexpensive and has a further higher purity.

The present invention provides a method for selectively placing carbon nanotubes on a substrate surface by using functionalized carbon nanotubes having an organic compound that is covalently bonded to such carbon nanotubes. The organic compound comprises at least two functional groups, the first of which is capable of forming covalent bonds with carbon nanotubes, and the second of which is capable of selectively bonding metal oxides. Such functionalized carbon nanotubes are contacted with a substrate surface that has at least one portion containing a metal oxide. The second functional group of the organic compound selectively bonds to the metal oxide, so as to selectively place the functionalized carbon nanotubes on the at least one portion of the substrate surface that comprises the metal oxide.

A method for producing a carbon nanotube thin film comprises a step of dropping a mixed liquid containing carbon nanotubes and an ionic liquid onto a liquid surface of a film forming liquid to spread the carbon nanotubes on the liquid surface.

The invention relates to a method for preparing a chitosan or sodium alginate-modified carbon nanotube-targeted slow release carrier in the technical field of nano materials, which comprises the following steps: preparing cut carbon nanotubes; preparing modified carbon nanotubes; preparing a modified carbon nanotube-targeted slow release carrier and adding aqueous solution of an anthracycline anticancer medicament; and subjecting the solution to supersonic treatment, stirring treatment and suction filtration, washing the product of the suction filtration, drying the product at room temperature under vacuum to obtain the chitosan or sodium alginate-modified carbon nanotube-targeted slow release carrier carrying the medicament. The method can realize an adriamycin carrying ratio of between 151 and 161 percent according to measurement.

The present invention relates to a kind of composite hydroxyapatite/carbon nanotube material and its preparation process. The composite material consists of mainly two components including hydroxyapatite and carbon nanotube. The technological process includes chemical preciptiation to synthesize hydroxyapatite, and compounding directly with carbon nanotube to prepare compoiste hydroxapatite/carbon nanotube material. The composite material possesses excellent mechanical performance and biocompatibility and certain magnetism and wave absorbing performance, so that the composite material may be used in repairing and replacement of body bone and extracorporeal physical treatment of bone diseases, and may have latent application as body's bearing bone, magnetic and wave-absorbing material.

The apparatus for mass production of carbon nanotubes uses a high-frequency furnace and a fluid flow process. A metallic catalyst and a reaction gas are supplied into a reaction chamber so that the catalyst and the decomposed carbonization gas are reacted in a vapor phase in the chamber to produce the nanotubes. After the reaction, the carbonization gas and the carbon nanotubes are transferred to a filter via a heat exchanger in which they are separated from each other. Then, the carbon nanotubes are collected in a collector, hydrocarbon of the reacted gas burns in air and is discharged to the outside, and inert gas, such as nitrogen and argon, is collected and supplied again to the chamber. The apparatus produces the nanotubes in mass quantities under atmospheric pressure, and requires no separate vacuum device, minimizing the scale and cost of the equipment.

A biosensor that utilizes carbon nanotubes functionalized with a protein sequence. One domain of the multifunctional peptide sequence noncovalently binds to the surface of single-walled carbon nanotubes (SWNTs), while a second domain of the sequence recognizes and binds to a target molecule. The sequence of the peptide may be tailored to allow it to recognize and bind to specific target molecules, such as chemicals, biological materials, and explosives. The binding of the target molecule to the peptide may alter a material property of the SWNTs.