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:Direct observation and mechanism of increased emission sites in Fe-coated microcrystalline diamond films
學年100
學期2
出版(發表)日期2012/06/01
作品名稱Direct observation and mechanism of increased emission sites in Fe-coated microcrystalline diamond films
作品名稱(其他語言)
著者Panda, Kalpataru; Sundaravel, B.; Panigrahi, B. K.; Huang, Pin-chang; Shih, Wen-ching; Chen, Huang-chin; Lin, I-nan
單位淡江大學物理學系
出版者American Institute of Physics(AIP)
著錄名稱、卷期、頁數Journal of Applied Physics 111(12), pp.124309 (9 pages)
摘要The electron field emission (EFE) properties of microcrystalline diamond(MCD) films are significantly enhanced due to the Fe coating and post-annealing processes. The 900 °C post-annealed Fe coated diamond films exhibit the best EFE properties, with a turn on field (E0) of 3.42 V/μm and attain EFE current density (Je) of 170 μA/cm2 at 7.5 V/μm. Scanning tunnelling spectroscopy (STS) in current imaging tunnelling spectroscopy mode clearly shows the increased number density of emission sites in Fe-coated and post-annealed MCD films than the as-prepared ones. Emission is seen from the boundaries of the Fe (or Fe3C) nanoparticles formed during the annealing process. In STS measurement, the normalized conductance dI/dVI/V versus V curves indicate nearly metallic band gap, at the boundaries of Fe (or Fe3C) nanoparticles. Microstructural analysis indicates that the mechanism for improved EFE properties is due to the formation of nanographite that surrounds the Fe (or Fe3C) nanoparticles.
關鍵字
語言英文
ISSN0021-8979
期刊性質國外
收錄於
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式電子版
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