No abstract

Since their discovery in 99, carbon nanotubes (CNTs) have been one of the most actively studied materials because of their unique structure and extraordinary physical properties []. Due to the high aspect ratio, excellent electrical property, and good mechanical stiffness, CNTs has been considered as an ideal candidate for field emitters [2][3][4]. However, it is still necessary to improve the emission current density, uniformity and stability for practical applications of field emission devices.