CuO Nanowire Arrays: Preparation, Characterization and Field Emission Properties

Abstract

Well-aligned CuO nanowire arrays were grown using a thermal oxidation method at temperatures ranging from 350 to 650degC. Morphology and structure characterization was done by field emission scanning electron microscopy, high resolution transmission electron microscopy and selected area electron diffraction, while composition and electronic structure was studied by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. Field emission properties including current-applied field characteristics, emission uniformity and temperature dependence are tested in a ultrahigh vacuum system