Abstract

Cupric Oxide (CuO) nanowires have been successfully synthesized by direct thermal oxidation of Cu film in air. The morphologies and structures of the synthesized materials are investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results imply that CuO nanowires with well vertical arrays present very narrow sharp peaks, indicating the nanowires are highly crystalline. The effect of ultraviolet (UV) illumination on the field emission characteristics of the CuO nanowires is investigated. The turn-on electric field of UV-illuminated CuO nanowires decreases and the field enhancement factor enhances.

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