The induction of a graphite-like phase on diamond films by a Fe-coating/post-annealing process to improve their electron field emission properties
學年 99
學期 2
出版（發表）日期 2011-04-01
作品名稱 The induction of a graphite-like phase on diamond films by a Fe-coating/post-annealing process to improve their electron field emission properties
作品名稱（其他語言）
著者 Huang, Pin-chang; Shih, Wen-ching; Che, Huang-chin; Lin, I-nan
單位 淡江大學物理學系
出版者 College Park: American Institute of Physics
著錄名稱、卷期、頁數 Journal of Applied Physics 109(8), 084309(7pages)
摘要 The electron field emission (EFE) process for diamondfilms was tremendously enhanced by Fe-coating and post-annealing processes. Microstructural analysis indicates that the mechanism for the improvement in the EFE process is the formation of nanographites with good crystallinity that surround the Fe (or Fe3C) nanoclusters. Presumably the nanographites were formed via the reaction of Fe clusters with diamondfilms, viz. by the dissolution of carbons into Fe (or Fe3C) clusters and the reprecipitation of carbon species to the surface of the clusters, a process similar to the growth of carbon nanotubes via Fe clusters as catalyst. Not only is a sufficiently high post-annealing temperature (900°C) required but also a highly active reducing atmosphere (NH3) is needed to give a proper microstructure for enhancing the EFE process. The best EFE properties are obtained by post-annealing the Fe-coated diamondfilms at 900°C in an NH3 environment for 5 min. The EFE behavior of the films can be turned on at E 0 = 1.9 V/μm, attaining a large EFE current density of 315 μA/cm2 at an applied field of 8.8 V/μm (extrapolation using the Fowler–Nordheim model leads to J e = 40.7 mA/cm2 at a 20 V/μm applied field).
關鍵字
語言 en
ISSN 0021-8979 1089-7550
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Huang, Pin-chang
審稿制度
國別 USA
公開徵稿
出版型式 紙本 電子版
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