Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1814880 | Physica B: Condensed Matter | 2008 | 5 Pages |
Abstract
Awl-shaped diamond-like carbon (DLC) was directly grown on anodic aluminum oxide (AAO) template by using filtered cathodic arc plasma (FCAP) technique at room temperature. The awls of DLC were about 250 nm in the height and the diameters of the awls were â¼100 nm at the top. The awl density was estimated to be â¼108 cmâ2. A broad asymmetric band ranging from 1100 to 1800 cmâ1 was detected by Raman spectrum. This asymmetric band was characteristic band of DLC. The sp3/(sp3+sp2) ratio of C-C bond of the awl-shaped DLC was measured by X-ray photoelectron spectrum, and it was about 68.3%. Field-emission properties of the awl-shaped DLC were investigated. A low turn-on field of 2.6 V/μm at 10 μA/cm2 with an emission area of 3.14 mm2 was achieved, and the emission current stability was very good. The results indicated that the electrons were emitted under both the effect of enhanced field because of the geometry and the work function of the DLC sample. Based on Fowler-Nordheim plot, the values of work function for the awl-shaped DLC were estimated in ranges of 0.23-1.08 from a linearity plot.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
C. Li, X.C. Li, E.M. Chong, X.Y. Fan, G.H. Yue, Y. Liu, P.X. Yan,