Preparation and field emission properties of nanostructured CuO emitters

Field emission properties of semiconductor nanostructured CuO films synthesized by both solid-liquid and solid-gas reaction methods under different conditions have been studied and compared. The morphology and structure of the prepared nanostructures CuO films were characterized using scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. Stable field emission at low field from CuO nanostructures has been obtained. The result indicates that nanostructured CuO could be a promising cold cathode material.