A method for forming cathodes for use in field emission devices using nanoparticles, such as carbon nanotubes (CNTs), is disclosed. The CNT layer comprises the electron emitting material on the surface of the cathode. Using the methods of the present invention, the density of the deposited CNTs may be...http://www.google.com.au/patents/US7736209?utm_source=gb-gplus-sharePatent US7736209 - Enhanced electron field emission from carbon nanotubes without activation