期刊
APPLIED SURFACE SCIENCE
卷 256, 期 4, 页码 1006-1009出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2009.05.119
关键词
Diamond; Field emission; Nano-fabrication; Electron affinity; Field enhancement
Nano-structured phosphorus-doped diamonds were fabricated for field emitters and their field emission properties were characterized. Two kinds of nano-structures were prepared; tip array structures and whiskers on tip structures. The tips, which have 100 nm radius and 10 mu m height, are used in tip array structures; whiskers have tip radii of 5 nm and height of 500 nm. Following nano-structure formation, a reduction of threshold fields is observed compared to non-patterned flat surfaces. This is ascribed to field concentration at the tips. However, at higher electric fields, a saturation of the emission current is observed due to non-negligible bulk resistances in tips and whiskers. (C) 2009 Elsevier B.V. All rights reserved.
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