摘要:
Processes for preparing catalyst structures, include forming a layer of a catalytic material on a substrate, and separating the layer of the catalytic material into droplet-shaped bodies of the catalytic material adhered to the substrate.
摘要:
The present invention relates to a process for producing a carbon nanotube (CNT) mat on a conductive or semiconductor substrate. According to this process, a catalytic complex comprising at least one metal layer is firstly deposited on said substrate. Said metal layer then undergoes an oxidizing treatment. Finally, carbon nanotubes are grown from the metal layer thus oxidized. The present invention also relates to a process for producing a via using said CNT mat production process.
摘要:
A substrate configured to support at least one electronic or electromechanical component and one or more nano-elements, formed with a base support, with a catalytic system, with a barrier layer, and with a layer configured to receive the electronic or electromechanical component, in single-crystal Si or in Ge or in a mixture of these materials. The catalytic system lies on the base support without any contact with the layer configured to receive electronic or electromechanical component and the barrier layer is sandwiched between the catalytic system and the layer configured to receive the electronic or electromechanical component. This barrier layer is without any contact with the base support.
摘要:
A process for making nanostructures on a support, including: supplying a support including a surface layer on one of its faces, covering the surface layer by a catalyst layer structured according to a pattern exposing areas of the surface layer covered by the catalyst and areas of the surface layer not covered by the catalyst, etching the thickness of the surface layer in the areas not covered by the catalyst layer, and selectively growing nanostructures on the areas of the surface layer covered by the catalyst. The process can also be used to make cathode structures with electrically independent nanostructures.
摘要:
A fuel cell includes at least one stack the main elements whereof are perpendicular to a support substrate. This stack is provided with an electrolytic membrane situated between a first and second electrode. The first and second electrodes each include a catalytic layer in contact with the electrolytic membrane. Each electrode includes an electrically conductive porous diffusion layer, and each stack is inserted between electrically conductive first and second support partitions perpendicular to the support substrate and constituting current collectors of the stack. The support partitions are electrically insulated from one another.
摘要:
A cathode structure of triode type which, superimposed over a substrate, includes a cathode electrode, an electric insulating layer, and a gate electrode, the electric insulating layer and the gate electrode having emission openings revealing at least one electron-emitting element electrically connected to the cathode electrode. The structure further includes a refocusing electrode arranged to refocus the electrons extracted by the gate electrode. The refocusing electrode is arranged on the electric insulating layer and is connected to an electric connection allowing a refocusing voltage to be applied to it via electrically conductive nanotubes. The cathode structure can be applied to a matrix-addressed field emission device.
摘要:
The present invention relates to a process for producing a carbon nanotube (CNT) mat (580) on a conductive or semiconductor substrate (510). According to this process, a catalytic complex (530,570) comprising at least one metal layer (570) is firstly deposited on said substrate. Said metal layer then undergoes an oxidizing treatment. Finally, carbon nanotubes are grown from the metal layer thus oxidized.The present invention also relates to a process for producing a via using said CNT mat production process.
摘要:
A microfluidic component comprises at least one closed microchannel filled with nanostructures. The microchannel is produced by previously forming an opening delineating a bottom wall and two opposite side walls of the microchannel in a surface of a substrate. The nanostructures filling said microchannel are formed by in situ growth to constitute a layer of metallic catalyst deposited on said side walls and on said wall bottom. The microchannel is closed, before the nanostructures are formed, by sealing a protective cover onto said surface of the substrate. Sealing is obtained by formation of an eutectic compound between a material of the cover and the metal of the catalyst used for in situ growth of the nanostructures and deposited on the surface of the substrate designed to come into contact with the cover.
摘要:
This invention relates to a triode type cathode structure comprising a cathode conductor (22), an electrical insulation layer (24) and a grid electrode (25), superposed on a support (21), the electrical insulation layer and the grid electrode comprising openings exposing at least one electron emitting element, electrically connected to the cathode conductor (22) and comprising nanotubes (28) made of an electron emitting material. The cathode structure comprises protective means preventing the longest nanotubes from coming into contact with the grid electrode (25).
摘要:
The invention relates to a method of structuring a catalyst on a support, characterised in that it comprises the following stages: depositing of a layer of catalyst on the support; annealing of the structure thus created to obtain a fractionation of the layer of catalyst in the shape of drops; etching of the fractionated layer of catalyst to adjust the density of the catalyst drops. The invention also relates to a method of carbon nanotube growth on the catalyst drops present on the structure obtained according to the method of structuring. Finally, the invention relates to a device comprising a cathode and an anode, the cathode comprising a layer of carbon nanotubes made according to the method of nanotube growth. No figures.