Modification of ultrananocrystalline diamond film microstructure via Fe-coating and annealing for enhancement of electron field emission properties

doi:10.1063/1.4739772

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/78970

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题名:	Modification of ultrananocrystalline diamond film microstructure via Fe-coating and annealing for enhancement of electron field emission properties
作者:	Teng, Kuang-yau;Shih, Wen-ching;Huang, Pin-chang;Chen, Huang-chin;Tang, Chen-yau;Lin, I-nan
贡献者:	淡江大學物理學系
日期:	2012-08
上传时间:	2012-11-07 15:04:51 (UTC+8)
出版者:	College Park: American Institute of Physics(AIP)
摘要:	The interaction between Fe-coatings and ultrananocrystalline diamond (UNCD) films during annealing was investigated in detail using transmission electron microscopy. The thin Fe-coating first formed nanosized Fe-clusters and then catalytically dissociated the diamond, re-precipitating carbon to form nanosized graphite clusters. These clusters formed conducting networks that facilitated electron transport and greatly improved the electron field emission (EFE) properties of the UNCD films. The extent of enhancement varied markedly with annealing temperature and atmosphere. For H2-annealed films, EFE behavior was optimized by annealing at 900 °C. EFE was turned on at (E0)H2 = 1.2 V/μm, attaining EFE current density of (Je)H2 = 772.0 μA/cm2 at an applied field of 8.8 V/mm. These characteristics were superior to those of UNCD films NH3-annealed at 850 °C. The inferior EFE properties for the NH3-annealed samples were attributed to reaction of NH3 with the hydrocarbon phase that encapsulated the nanosized diamond grains, hindering Fe–diamond interaction.
關聯:	Journal of Applied Physics 112(3), 033708(8pages)
DOI:	10.1063/1.4739772
显示于类别:	[物理學系暨研究所] 期刊論文

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