Abstract:
A process gas (such as a hydrocarbon gas) is flowed through a thermal cracking apparatus to crack the process gas into constituent components (such as hydrogen gas and solid carbon nano-particles, e.g., carbon nano-onions, necked carbon nano-onions, carbon nanospheres, graphene, graphite, highly ordered pyrolytic graphite, single walled nanotubes, and/or multi-walled nanotubes). The thermal cracking apparatus has an elongated heating element disposed within an inner volume along a longitudinal axis thereof. The elongated heating element heats the process gas as it flows within a longitudinal elongated reaction zone to thermally crack molecules of the process gas into the constituent components of the molecules.
Abstract:
Pièce (12a) pour mouvement horloger, réalisée en un matériau composite comprenant une matrice rigide et une forêt de nanotubes contenue dans la matrice rigide.
Abstract:
A chemical vapor deposition method for fluorine-containing carbon materials preparation provided. The claimed method comprises treating of carbons with fluorocarbons or derivatives that passes at a moderate high temperature. The fluorine-containing carbon materials show hydrophobicity, high thermal stability and can be used as catalysts support, lithium battery anodes, and hydrophobic materials or as surface precursor. Surface fluorine characterized by intensive signal in the XPS spectrum, found in a range of 685- 687 eV. Obtained fluoro-containing functionalities is stable at a temperature about 1000 °C.
Abstract:
The invention relates to a method of functionalizing surfaces of carbon nanomaterials using oxygen in the air. The method is clean and eco-friendly with virtually zero chemical usage and zero waste generation. The dispersion of the surface-functionalized carbon nanomaterials is excellent in organic solvents.
Abstract:
본 발명은 다중벽 탄소나노튜브 합성을 위한 촉매에 관한 것으로, 더욱 구체적으로는 합성된 다중벽 탄소나노튜브의 분산이 용이하고, 전도성을 현저하게 향상시킬 수 있는 다중벽 탄소나노튜브 합성을 위한 촉매, 그 촉매의 제조 방법 및 그 촉매로 합성된 다중벽 탄소나노튜브에 관한 것이다.
Abstract:
A real time radiation dosimeter includes a first electrode and a second electrode, such as cathode and anode electrodes. The second electrode is based on carbon nanomaterials, such as carbon nanotubes bucky paper, carbon nanotubes forest and graphene film. The dosimeter is connected to an electrometer, able to apply a bias voltage between the electrodes and to measure the collected charge. The manufactured detectors display an excellent linear response to dose. The dosimeter with nanotubes forest is able to collect charge also to zero voltage, allowing in vivo applications. The use of nanomaterials allows a miniaturized version of dosimeters.
Abstract:
Methods of producing fibrous solid carbon forests include reacting carbon oxides with gaseous reducing agents in the presence of a catalyst having a predetermined grain size to cause growth of fibrous solid carbon forests upon a surface of the metal. The fibrous solid carbon forests are substantially perpendicular to the surface of the metal thus creating the "forests". A bi-modal forest composition of matter is described in which a primary distribution of fibrous solid carbon comprises the forest and a secondary distribution of fibrous solid carbon is entangled with the primary distribution. A reactor includes a catalyst, a means for facilitating the reduction of a carbon oxide to form solid carbon forests on a surface of the catalyst, and a means for removing the solid carbon forest from the surface of the metal catalyst.
Abstract:
The method of the present disclosure is directed towards the formation of a three-dimensional carbon structure and includes the steps of adding a radical initiator to an amount of carbon starting material, forming a mixture, placing the mixture in a mold, maintaining the mixture and the mold at an elevated temperature for a period of time to form a thermally cross-linked molded mixture and removing the thermally cross-linked molded mixture from the mold. The disclosure also includes a three-dimensional carbon structure, with that structure including a thermally cross-linked carbon base material in a predetermined formation.
Abstract:
In some embodiments, the present invention pertains to carbon nanotube fibers that include one or more fiber threads. In some embodiments, the fiber threads include doped multi-walled carbon nanotubes, such as doped double-walled carbon nanotubes. In some embodiments, the carbon nanotubes are functionalized with one or more functional groups. In some embodiments, the carbon nanotube fibers are doped with various dopants, such as iodine and antimony pentafluoride. In various embodiments, the carbon nanotube fibers of the present invention can include a plurality of intertwined fiber threads that are twisted in a parallel configuration with one another. In some embodiments, the carbon nanotube fibers include a plurality of fiber threads that are tied to one another in a serial configuration. In some embodiments, the carbon nanotube fibers of the present invention are also coated with one or more polymers. Additional embodiments of the present invention pertain to methods of making the aforementioned carbon nanotube fibers.