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This study investigates quantum mechanically the effect of spacing of aligned carbon nanotubes on field emission properties. It is known that for a given length of CNTs, it is beneficial for electron emission as the spacing of CNTs are increased. As the spacing of CNTs reduces, the effect of screening becomes stronger and current density become smaller. It is very useful to know the relationship between...
The modified neglect of diatomic overlap semiempirical quantum mechanical method, a multiscale quantum/classical hybrid method, is used to simulate the field electron emission in single-wall carbon nanotubes. The classical analysis and quantum computations have shown that a larger separation of the anode from the emitter enhances the field electron emission
A multi-scale simulation strategy was used to simulate the single-walled carbon nanotube in realistic field emission experimental condition. For carbon nanotube which have much less atoms than the bulk emitters, the non-equilibrium effect is important, especially when the emission current is strong. The emission current plot line simulated with the nonequilibrium effect and without the nonequilibrium...
Summary form only given. We have reviewed the recent progresses in simulations on the field electron emission (FE) from carbon nanotubes of physical sizes. We propose a theoretical model which reveals the origin of the low turn-on field of FE of carbon nanotubes
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