摘要:
The invention concerns a method and a device for electronic cyclotronic resonance plasma deposit of carbon nanofibres or nanotubes in fabric form, on a catalyst-free substrate, by microwave power injection into a deposit chamber comprising a magnetic structure with a highly unbalanced magnetic mirror, and at least an electronic cyclotronic resonance inside said deposit chamber itself and opposite said substrate, whereby, under pressure less than 10-4 mbar, the carbon-containing gas in said magnetic mirror at the centre of the deposit chamber is ionised and/or dissociated, thereby producing species which will be deposited on said substrate which is heated. The invention further concerns a layer, optionally on a substrate, formed of a fabric or array of carbon nanofibres or nanotubes interconnected as in a web, said layer being catalyst-free and having multiple layers-or a multilayer structure - comprising at least two layers of carbon nanofibres or nanotubes in fabric form, and filters, nanogrids accelerating or decelerating electrons and flat displays comprising such layers or structures.
摘要:
The invention relates to a method of synthesising nanorods from a carbide of a metal M1 on a substrate. The inventive method consists in: (a) depositing, on the substrate, a layer of oxide nanocrystals of metal M1 and oxide nanocrystals of at least one other metal M2 which is different from metal M1, the oxide nanocrystals of metal M1 being dispersed in said layer; (b) reducing the oxide nanocrystals of metals M1 and M2 into the corresponding metals; and (c) selectively growing nanocrystals of metal M1. The invention also relates to a method of growing nanorods of a carbide of metal M1 on a substrate from nanocrystals of said material, to the substrates thus obtained and to the applications thereof, such as in the production of: microsystems comprising chemical or biological functions and, in particular, biosensors; electron-emitting sources, e.g. for flat television or computer screens, etc.
摘要:
The invention concerns a source of ions with electronic cyclotron resonance in which the magnetic structure comprises at least two electromagnetic coils (8, 10) each traversed by an electric current in a direction opposite to that traversing the other coil so as to produce closed equally magnetic surfaces (S) and at least a pair of confinement electrodes (12) mounted facing each other, perpendicular to the axis of the electromagnetic coils and capable of reinforcing the confinement produced by the electromagnetic coils.
摘要:
The invention concerns an electronic cyclotron resonance plasma deposit of single-wall carbon nanotubes, on a catalyst-free substrate, by microwave power injection into a deposit chamber comprising a magnetic confinement structure with magnetic mirror, and at least an electronic cyclotron resonance zone right inside or bordering said deposit chamber and facing said substrate, whereby, under pressure less than 10-3 mbar, a carbon-containing gas in the magnetic mirror at the centre of the deposit chamber is dissociated and/or ionised, producing species which are deposited on said substrate which is heated; method wherein the substrate has protrusions and/or recesses. The invention also concerns the resulting single-wall nanotubes (SWNT).
摘要:
The invention concerns a method and a device for electronic cyclotronic resonance plasma deposit of carbon nanofibres or nanotubes in fabric form, on a catalyst-free substrate, by microwave power injection into a deposit chamber comprising a magnetic structure with a highly unbalanced magnetic mirror, and at least an electronic cyclotronic resonance inside said deposit chamber itself and opposite said substrate, whereby, under pressure less than 10-4 mbar, the carbon-containing gas in said magnetic mirror at the centre of the deposit chamber is ionised and/or dissociated, thereby producing species which will be deposited on said substrate which is heated. The invention further concerns a layer, optionally on a substrate, formed of a fabric or array of carbon nanofibres or nanotubes interconnected as in a web, said layer being catalyst-free and having multiple layers-or a multilayer structure - comprising at least two layers of carbon nanofibres or nanotubes in fabric form, and filters, nanogrids accelerating or decelerating electrons and flat displays comprising such layers or structures.
摘要:
The invention concerns an electronic cyclotron resonance plasma deposit of single-wall carbon nanotubes, on a catalyst-free substrate, by microwave power injection into a deposit chamber comprising a magnetic confinement structure with magnetic mirror, and at least an electronic cyclotron resonance zone right inside or bordering said deposit chamber and facing said substrate, whereby, under pressure less than 10-3 mbar, a carbon-containing gas in the magnetic mirror at the centre of the deposit chamber is dissociated and/or ionised, producing species which are deposited on said substrate which is heated; method wherein the substrate has protrusions and/or recesses. The invention also concerns the resulting single-wall nanotubes (SWNT).