Abstract

White carbon films were synthesized by microwave plasma chemical vapor deposition. Irregular flakiness microstructure consisting of nanocrystalline grains of the as-grown film was observed by scanning electron microscope. The films have a metallic gray to white color, with reflectivity of 12.56%–21.58% in the visible region. The diffraction line at 2θ=21.6° (d=0.4107nm), shown in x-ray diffraction spectrum of the film, corresponds to the (110) facet of β modifications of white carbon. The peak position at 283.46eV in the x-ray photoelectron spectrum represents binding energy of C1s core level of sp1 hybridization of carbon. Field electron emission characteristics of the film were tested. A turn-on field of 3.5V∕μm was obtained.

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