Abstract:
Systems and methods in accordance with embodiments of the invention generate tunable electromagnetic waves using carbon nanotube-based field emitters. In one embodiment, a CNT-based irradiator includes: at least one CNT-based cathode, itself including: a plurality of carbon nanotubes adjoined to a substrate; a plurality of anodic regions; where each anodic region is configured to emit a distinctly different class of photons in a direction away from the at least one cathode in response to a same reception of electrons; where each of the plurality of anodic regions is operable to receive electrons emitted from at least one of said at least one CNT-based cathode; and where each of the at least one CNT-based cathode and the plurality of anodic regions are disposed within a vacuum encasing.
Abstract:
The present invention relates to a conductive nanostructure, to a method for molding same, and to a method for manufacturing a field emitter using same. More particularly, the present invention relates to a field-emitting nanostructure comprising: a conductive substrate; a conductive nanostructure arranged on the conductive substrate; and a conductive interface compound disposed in the interface between the conductive substrate and the conductive nanostructure, as well as to a method for molding same, and to a method for manufacturing a field emitter using same.
Abstract:
A method of fabricating a cathodic portion of a field emission display includes the steps of producing an array of substantially parallel carbon nanotubes attached at one end to a substantially planar substrate. Then, embedding the nanotubes in a polymer matrix that extends to a plane of attachment of the nanotubes to the planar substrate, wherein the polymer matrix allows an end of the nanotubes distal from the ends attached to the planar substrate, uncovered by the polymer matrix in order to allow electrical contact with each other and with an attached conductor. Next, detaching the array from the planar substrate, thus producing a surface having the formerly attached ends of the nanotubes substantially in a plane, and then attaching the conductor to the array of nanotube ends, uncovered by the polymer matrix and distal to the plane.
Abstract:
A method of fabricating a cathodic portion of a field emission display includes the steps of producing an array of substantially parallel carbon nanotubes attached at one end to a substantially planar substrate. Then, embedding the nanotubes in a polymer matrix that extends to a plane of attachment of the nanotubes to the planar substrate, wherein the polymer matrix allows an end of the nanotubes distal from the ends attached to the planar substrate, uncovered by the polymer matrix in order to allow electrical contact with each other and with an attached conductor. Next, detaching the array from the planar substrate, thus producing a surface having the formerly attached ends of the nanotubes substantially in a plane, and then attaching the conductor to the array of nanotube ends, uncovered by the polymer matrix and distal to the plane.
Abstract:
Le domaine général de l'invention est celui des cathodes électroniques de type « cathode froide » comprenant un substrat plan (2) électriquement conducteur et un émetteur comportant une pointe (1) de diamètre micrométrique ou nanométrique disposée verticalement au-dessus de la surface du substrat. La cathode selon l'invention comporte une et une seule électrode annulaire (6) isolée électriquement du substrat par une couche d'isolant (3) et centrée sur l'émetteur, la source comportant des moyens permettant d'appliquer une différence de potentiel de plusieurs dizaines de volts entre le substrat et l'électrode annulaire, suffisante pour provoquer l'émission d'un faisceau électronique à la pointe de l'émetteur, l'électrode annulaire étant de dimension suffisante pour assurer la focalisation dudit faisceau électronique. Une source de faisceau électronique peur comporter une pluralité de cathodes identiques agencées selon un motif particulier.
Abstract:
This invention relates to the electrochemical deposition of carbon nanotubes ('CNTs') on a substrate using an electrochemical cell. A dispersion of a complex of CNTs and an anionic polymer is neutralized and thereby caused to deposit on the anode plate of the cell.
Abstract:
This invention relates to a composition comprising carbon nanotubes and a protective material that protects the carbon nanotubes from damage or degradation such as by oxidation upon exposure to high temperature.