Abstract
Abstract Crystalline MoO 2 nanowires arrays were synthesized by electrochemical deposition from Na 2 MoO 4 aqueous solution using pre-annealed anodic aluminum oxide (AAO) template, then followed by annealed in a tube furnace at 650 °C under an atmosphere of a 10% hydrogen/90% nitrogen mixture. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Field emission measurements demonstrated that the turn-on voltage of the MoO 2 nanowires arrays was 3.0 V/μm and the threshold voltage was 4.6 V/μm. The MoO 2 nanoarrays provide an alternative substitute for the manufacturing of Mo-based field emitters because of the convenient preparation of nanoarrays.
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