Work function measurements of vanadium doped diamond-like carbon films   by ultraviolet photoelectron spectroscopy
  Vanadium doped diamond-like carbon films prepared by unbalanced magnetron sputtering have been investigated by X-ray and ultraviolet photoelectron spectroscopy measurements for the purpose of revealing electronic structures including values of work function on the surfaces. In addition to these photoelectron measurements, X-ray diffraction measurements have been performed to characterize the crystal structures. 
Akihiko Shigemoto, Tomoko Amano, Ryozo Yamamoto
cond-mat.mtrl-sci