carbon nanotubes

The article presents the latest published in the literature data on the development and research of promising field emitters made from carbon nanotubes, graphene and semiconductors. The possibilities of obtaining high densities and currents of field emission, as well as opportunities to ensure long-term operation of emitters in high-voltage electron devices are analyzed.

The synthesis of carbon nanotubes is carried out on the surface of molybdenum substrates by CVD-method using thin-film iron and water solutions of ferritin and iron acetate as catalysts sources. It is found that the temperature of process technology in the synthesis of carbon nanotubes on molybdenum substrates must be above 900 ◦C. At this point, only non-uniform films of carbon nanotubes on the surface of molybdenum substrates were obtained.