Has a very low turn-on and field emission threshold field strength, a large field emission current density and higher emission stability

Nanotubes having a smaller radius of curvature, the larger the aspect ratio, high conductivity, excellent mechanical strength and chemical stability, etc., making it ideal for field emission cathode material. The earliest research on carbon nanotube field emission is De Heer WA reported in 1995 in Science magazine published, followed by a large number of studies have shown that it has a very low turn-on and field polycrystalline diamond field strength, and a big field emission current density, and higher emission stability. Prepared using carbon nanotube field emission electron source  abrasive wheels  type flat panel display prototypes. Then there are some of the research team successfully demonstrated based on synthetic diamond powder as electron sources such as X-ray tube practical vacuum microelectronic devices. These devices are the core of the production process of an efficient carbon nanotube field emission cathode production. About CNT field emission cathode production there are three main methods: chemical vapor deposition, and electrophoretic assembly of printed carbon nanotube paste.