氧化铜纳米线的制备及其场发射特性

he CuO nanowires were grown on copper substrates by hydrothermal method with varying reacting solution concentration((NH4)2S2O8: 0.04 M, 0.15 M). The morphology and structure characteristics of CuO nanowires fabricated in different conditions were investigated by Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). The field emission properties were also evaluated. The results showed that the CuO nanowires density and length were greatly influenced by concentration of reaction solution. The CuO nanowires prepared in solution concentration ((NH4)2S2O8 is 0.15 M) exhibit higher density, smaller diameter, shorter in length and pointed end of CuO nanowires. And it also shows good field emission properties with a low turn-on field, about 2.4 V/μm.