Field emission properties of double-walled carbon nanotubes coated with Ru metal nanoparticles

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.

Carbon Nanotubes Decorated with Platinum Nanoparticles for Field-Emission Application

“…In recent years, several approaches to improve field emission (FE) properties of CNTs and to make them suit the present needs were reported. Among them doping, coating, thermal annealing, cutting, and tip treatment of CNTs deserved special attention as it proved to be an efficient tool to not only greatly decrease its turn-on electric field but also to extend its stability for tens of hours . For instance, Sun et al reported that annealing at 900 °C could influence significantly on FE properties of CNTs .…”

“…Among them doping, coating, thermal annealing, cutting, and tip treatment of CNTs deserved special attention as it proved to be an efficient tool to not only greatly decrease its turn-on electric field but also to extend its stability for tens of hours. 5 For instance, Sun et al reported that annealing at 900 °C could influence significantly on FE properties of CNTs. 4 In turn, the surface modification of CNTs by decorating with metal nanoparticles (NPs) was discovered to be one of the most effective methods to enhance FE performance.…”