教師資料查詢 | 類別: 期刊論文 | 教師: 林諭男 I-nan Lin (瀏覽個人網頁)

標題: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
語言英文
ISSN0021-8979;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
國別美國
公開徵稿
出版型式紙本;電子版
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