Abstract:
An electron emitter is formed by in situ growth from the vapor on catalyst clusters that are adhered by an adhesion layer to a conductive electrode. The emitter comprises hemispheroidal nanofiber clusters that emit electrons at low field strengths and high current densities, producing bright light by the interaction of the electrons and a fluorescent and/or phosphorescent film on an anode spaced across an evacuated gap. The nanofibers may be grown such that the nanofiber clusters are entangled, restricting movement of individual nanofibers.
Abstract:
The present invention relates to a field emission cathode, comprising an at least partly electrically conductive base structure, and a plurality of electrically conductive micrometer sized sections spatially distributed at the base structure, wherein at least a portion of the plurality of micrometer sized sections each are provided with a plurality of electrically conductive nanostructures. Advantages of the invention include lower power consumption as well as an increase in light output of e.g. a field emission lighting arrangement comprising the field emission cathode.
Abstract:
The present invention relates to a method for manufacturing a field emitter electrode, in which nanowires are aligned horizontally, perpendicularly or at any angle between horizontal and perpendicular according to the direction of a generated electromagnetic field. More particularly, the present invention relates to a method for manufacturing a field emitter electrode having nanowires aligned horizontally, perpendicularly or at any angle between horizontal and perpendicular according to the direction of a generated electromagnetic field, the method comprising the steps of diluting nanowires in a solvent, dispersing the resulting solution on a substrate fixed to the upper part of an electromagnetic field generator, and fixing the nanowires aligned in the direction of an electromagnetic field generated from the electromagnetic field generator. According to the present invention, a high capacity field emitter electrode having high density nanowires aligned according to the direction of a generated electromagnetic field can be fabricated by a simple process and nanowires can be used as positive electrode materials for field emission displays (FEDs), sensors, electrodes, backlights and the like.
Abstract:
The present invention relates to a method for manufacturing a field emitter electrode, in which nanowires are aligned horizontally, perpendicularly or at any angle between horizontal and perpendicular according to the direction of a generated electromagnetic field. More particularly, the present invention relates to a method for manufacturing a field emitter electrode having nanowires aligned horizontally, perpendicularly or at any angle between horizontal and perpendicular according to the direction of a generated electromagnetic field, the method comprising the steps of diluting nanowires in a solvent, dispersing the resulting solution on a substrate fixed to the upper part of an electromagnetic field generator, and fixing the nanowires aligned in the direction of an electromagnetic field generated from the electromagnetic field generator. According to the present invention, a high capacity field emitter electrode having high density nanowires aligned according to the direction of a generated electromagnetic field can be fabricated by a simple process and nanowires can be used as positive electrode materials for field emission displays (FEDs), sensors, electrodes, backlights and the like.
Abstract:
A method for fabricating field emission cathode, a field emission cathode, and a field emission lighting source are provided. The method includes: forming a catalyst crystallite nucleus layer on the surface of cathode substrate by self-assembly of a noble metal catalyst, growing a composited nano carbon material on the cathode substrate by using a TCVD process, in which the composited nano carbon material includes coil carbon nano tubes and coil carbon nano fibers. The measured quantity of total coil carbon nano tubes and coil carbon nano fibers is higher than 40%. The field emission cathode is fabricated by the aforementioned method, and the field emission lighting source includes the aforementioned field emission cathode.
Abstract:
Improved field emission cathodes comprise a fiber of highly aligned and densely packed single-wall carbon nanotubes, double-wall carbon nanotubes, multi-wall carbon nanotubes, grapheme nanoribbons, carbon nanofibers, and/or carbon planar nanostructures. The fiber cathodes provide superior current carrying capacity without degradation or adverse effects under high field strength testing. The fibers also can be configured as multi-fiber field emission cathodes, and the use of low work function coatings and different tip configurations further improves their performance.
Abstract:
A field emission device includes a substrate and a plurality of wires embedded in the substrate. The plurality of wires has at least a field emitter cathode wire; a control grid wire array; and a collector anode array. The field emitter cathode wire, control grid wire array, and collector anode array are embedded in and extend through a nonconductive substrate matrix. A method for making a vacuum field emission device is also disclosed.
Abstract:
The present invention relates to a method for manufacturing a field emitter electrode, in which nanowires are aligned horizontally, perpendicularly or at any angle between horizontal and perpendicular according to the direction of a generated electromagnetic field. More particularly, the present invention relates to a method for manufacturing a field emitter electrode having nanowires aligned horizontally, perpendicularly or at any angle between horizontal and perpendicular according to the direction of a generated electromagnetic field, the method comprising the steps of diluting nanowires in a solvent, dispersing the resulting solution on a substrate fixed to the upper part of an electromagnetic field generator, and fixing the nanowires aligned in the direction of an electromagnetic field generated from the electromagnetic field generator. According to the present invention, a high capacity field emitter electrode having high density nanowires aligned according to the direction of a generated electromagnetic field can be fabricated by a simple process and nanowires can be used as positive electrode materials for field emission displays (FEDs), sensors, electrodes, backlights and the like.