Electron field emission properties of carbon nanostructure synthesized by catalyst assisted solid-state growth process

摘要

The electron field emission properties of nanostructured carbon clusters (or carbon fibers) formed by catalyst assisted solid-state growth process from diamond or diamondlike films were investigated. The SEM microscopic and Raman spectroscopic examinations show that the diamond (diamondlike) films, were converted into fibrous carbonaceous materials, when they were coated with a thin layer of Fe/Co films (< 10 nm) and then post-annealed at high enough temperature (> 950 deg C). Precoating a obtained nanostructured carbons grown on diamondlike films are J_c = 300 muA/cm~2, whereas those on boronitrogen-codoped diamond films are J_c = 1080 muA/cm~2, at 21.6 V/mum applied field.