Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5365888 | Applied Surface Science | 2008 | 4 Pages |
Abstract
A patterned array of diamond-like carbon (DLC) was grown on anodic aluminum oxide (AAO) template by filtered cathodic arc plasma (FCAP) technique at room temperature. The diameters of patterned array of DLC were â¼150 nm, and the patterned array density was estimated to â¼109 cmâ2. A broad asymmetric band ranging from 1000 cmâ1 to 2000 cmâ1 was detected by Raman spectrum attributed to characteristic band of DLC. The fraction of sp3 bonded carbon atoms of the patterned array of DLC was measured by X-ray photoelectron spectrum (XPS) and the ratio was about 62.4%. Field emission properties of the patterned array of DLC were investigated. A low turn-on field of 3.4 V/μm at 10 μA/cm2 with an emission area of 3.14 mm2 was achieved. 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 patterned array of DLC were estimated in range of 0.38 to 1.75 from a linearity plot.
Keywords
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
C. Li, X.C. Li, E.M. Chong, P.J. Zhang, X.Y. Fan, P.X. Yan,