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基于改进的悬浮球模型。计算了碳纳米管和衬底间的接触电阻存在时碳纳米管顶端的局域电场,并结合FowlerNordhenim(F-N)场发射规律研究了接触电阻对碳纳米管场发射的影响.研究表明,接触电阻的存在,在高电场区域接触电阻抑制了碳纳米管的电子场发射,导致在高电场区域出现电流饱和及FN直线偏折现象.其原因可归结为接触电阻使得在碳纳米管顶端的局域电场相对于没有接触电阻时相对地减少.
Based on the improved suspension ball model. The local electric field at the top of carbon nanotube in the presence of contact resistance between carbon nanotubes and substrate was calculated and the field emission characteristics of carbon nanotubes were investigated by Fowler Nordhenim (FN) field emission law.The results show that the contact resistance , The contact resistance in the high electric field inhibits the electron field emission from the carbon nanotubes, resulting in current saturation and FN linear deflection in the high electric field.The reason can be attributed to the contact resistance that makes the local The electric field is relatively reduced relative to no contact resistance.