Field electron emission from polycrystalline diamond film, nanocrystalline diamond film and diamond-like film has been investigated. The characteristics of the films have been identified by using x-ray diffraction, scanning electron microscope and Raman spectroscopy. The field emission experiment has been performed in a vacuum system with a base pressure of about 10$+$MIN@7$/ Torr. The turn-on fields of 1.6V/$mu@m and 2.4V/$mu@m were obtained from polycrystalline and nanocrystalline diamond film, separately. A very low turn-on field of 1.2V/$mu@m was obtained for the diamond- like thin film.
展开▼
