Scanning field emission from patterned carbon nanotube films

被引:913
作者
Nilsson, L [1 ]
Groening, O
Emmenegger, C
Kuettel, O
Schaller, E
Schlapbach, L
Kind, H
Bonard, JM
Kern, K
机构
[1] Univ Fribourg, Inst Phys, CH-1700 Fribourg, Switzerland
[2] Ecole Polytech Fed Lausanne, Dept Phys, CH-1015 Lausanne, Switzerland
关键词
D O I
10.1063/1.126258
中图分类号
O59 [应用物理学];
学科分类号
摘要
The investigation of the field emission (FE) properties of carbon nanotube (CNT) films by a scanning anode FE apparatus, reveals a strong dependence on the density and morphology of the CNT deposit. Large differences between the microscopic and macroscopic current and emission site densities are observed, and explained in terms of a variation of the field enhancement factor beta. As a consequence, the emitted current density can be optimized by tuning the density of CNTs. Films with medium densities (on the order of 10(7) emitters/cm(2), according to electrostatic calculations) show the highest emitted current densities. (C) 2000 American Institute of Physics. [S0003-6951(00)00815-9].
引用
收藏
页码:2071 / 2073
页数:3
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