Filament including carbon nanotubes and method of making a filament including carbon nanotubes

摘要

Techniques described herein generally relate to methods of manufacturing devices and devices including a filament having therein or coated with a catalyst and carbon nanotubes. The device may be configured to produce light with a luminary characteristic having a value higher than a value of the luminary characteristic of a device having an uncoated filament at a same operating condition. The luminary characteristic may include one or more of device irradiance or light efficiency. The filament may be a tungsten filament, and the carbon nanotubes may include multiwall carbon nanotubes or single wall carbon nanotubes. The filament may be coated with the carbon nanotubes using one or more deposition techniques including electric arc discharge, laser ablation and chemical vapor deposition (CVD). The filament may be coated with the catalyst using a method including one or more of electroless plating, electroplating, dip coating, spin coating, and radio frequency (RF) sputtering.

主权项

1. A device comprising:
a filament that includes carbon nanotubes, the carbon nanotubes comprising multiwall carbon nanotubes, wherein the device is configured to produce light with a luminary characteristic having a first value, wherein the first value is higher than a second value of the luminary characteristic of a device having an uncoated filament at a same operating condition; and a catalyst on the filament, the catalyst having a thickness in a range from about 50 nm to about 200 nm, and the filament having a diameter in a range from about 0.0030 cm to about 0.0102 cm; wherein the filament is located in a sealed housing, an atmosphere in the housing at a pressure below 10−2 mbar; and wherein the filament is selected from a group consisting of a continuous flat multifilaments, continuous twisted multifilaments, and continuous textured multifilaments.