Simulation and Study the Current Emission in a CNT Field Emitter

Carbon nanotube is one of the wonder discovers in today science. The unique properties of this nanostructure material, such as, high aspect ratio, high mechanical strength, high electrical and thermal conductivity, and chemical stability create the application potential of this material in various industrial fields. One of the important application of this material is in field emission devices such as X-ray tubes, field emission displays (FEDs) applicable in electronic and medicine industries .In this paper, a field emitter device consist of single wall carbon nanotube-Fiber is simulated and studied using finite element method (FEM). With solving the electrostatic and Fowler-Nordhiem equations, the electric field in tip of field emitter and the further emitted current in presence of the voltages between 0 to 2000V are obtained. The obtained current is equal to 0.9 mA that is in well accordance with the experimental result reported in literature. The results of present work could be used to establish a design procedure for producing a well controlled field emission device using CNT.

کلیدواژه ها:

carbon nanotube ، fiber ، field emitter ، field emission device ، finite element method