INFLUENCES OF DENSITY AND DIMENSION OF CARBON NANOTUBES ON THEIR FIELD EMISSION
来源期刊：Acta Metallurgica Sinica2003年第4期
论文作者：C.G.Hu W.L.Wang Y.B.Zhu
Key words：carbon nanotube array; field emission; optimum density;
Abstract: The influences of density and dimension of carbon nanotubes on their electron emission from arrays are studied. The tip electric field of nanotubes, electric field enhancement factor, and optimum nanotube density are expressed by analytic equations. The theoretical analyses show that the field enhancement factor is sensitive to nanotube density, and can be sharply improved at a specific and optimum density. Some experiments have demonstrated these. Owning to electrostatic screening effect, the length of carbon nanotubes has little effect on their emission. A uniformly-distributed carbon nanotube array model is set up, and applied to analysis of carbon nanotube arrays.The results obtained here are in good agreement with the experimental data.
C.G.Hu1，W.L.Wang1，Y.B.Zhu1
(1.Department of Applied Physics, Chongqing University, Chongqing 400044, China;
2.Department of Physics, Jiangsu Normal University, Suzhou 221009, China)
Abstract:The influences of density and dimension of carbon nanotubes on their electron emission from arrays are studied. The tip electric field of nanotubes, electric field enhancement factor, and optimum nanotube density are expressed by analytic equations. The theoretical analyses show that the field enhancement factor is sensitive to nanotube density, and can be sharply improved at a specific and optimum density. Some experiments have demonstrated these. Owning to electrostatic screening effect, the length of carbon nanotubes has little effect on their emission. A uniformly-distributed carbon nanotube array model is set up, and applied to analysis of carbon nanotube arrays.The results obtained here are in good agreement with the experimental data.
Key words:carbon nanotube array; field emission; optimum density;
【全文内容正在添加中】
