Effect of geometrical parameters on the field-emission properties of single-walled carbon nanotube ropes

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	Effect of geometrical parameters on the field-emission properties of single-walled carbon nanotube ropes
	Z. G. Zhao; Y. Tong; C. Liu; H. M. Cheng
	2003
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	18 期号:9 页码:2188-2193
摘要	Aligned single-walled carbon nanotube (SWNT) ropes show excellent field-emission performance due to their high aspect ratio and sound alignment. In this study, the effect of geometrical parameters, such as cathode-anode distance and the height of SWNT ropes on the field-emission properties of SWNT ropes was investigated. It was found that the cathode-anode distance influences the emission properties, such as the turn-on field F-to and threshold field F-thr, of SWNT ropes, and the turn-on and threshold fields are marginally decreased at relatively larger gaps between the SWNT emitter tip and the anode plane. It was also found that the emission properties of SWNT ropes are improved by increasing the rope length, at least in the present experimental range. A possible two-step field amplification model was proposed to explain this length effect of SWNT ropes. The estimated results show that the local field at the tip of SWNT ropes, which causes a certain emission-current density, seems not to change with the cathode-anode distance, and the effective emission area of the SWNT rope is much smaller than the apparent cross-sectional area of the SWNT rope. The results obtained suggest that it is possible to optimize the performance of SWNT rope-based cold cathode by adjusting geometrical parameters of SWNT rope emitters.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;cheng, hm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
URL	查看原文
WOS记录号	WOS:000185154600026
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36207
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. G. Zhao,Y. Tong,C. Liu,et al. Effect of geometrical parameters on the field-emission properties of single-walled carbon nanotube ropes[J]. Journal of Materials Research,2003,18(9):2188-2193.
APA	Z. G. Zhao,Y. Tong,C. Liu,&H. M. Cheng.(2003).Effect of geometrical parameters on the field-emission properties of single-walled carbon nanotube ropes.Journal of Materials Research,18(9),2188-2193.
MLA	Z. G. Zhao,et al."Effect of geometrical parameters on the field-emission properties of single-walled carbon nanotube ropes".Journal of Materials Research 18.9(2003):2188-2193.