Negative-electron-affinity effect on the surface of chemical-vapor-deposited diamond polycrystalline films

Abstract
Strong negative-electron-affinity effects have been observed on the surface of as-grown chemical-vapor-deposited diamond using secondary-electron emission. The samples were randomly oriented polycrystalline diamond films terminated with hydrogen. The effect appears as an intensive peak in the low-energy part of the spectrum of the electron energy distribution and may be described in the model of effective negative electron affinity.