Abstract
A process for producing nanotube-like carbon clusters on the surface of diamond films, in order to improve the electron field emission properties of the films was described. Results showed that the electron field emission properties of the diamond films increased remarkably on coating with ultrathin Fe/CO alloy and postannealing at high temperature. The converted diamond films displayed an electron emission current density of 3.8 mA/cm 2 at 22.4 V/νm applied field.