A mechanism of diamond growth with carbon nanotube nucleation agent by hot-filament chemical vapor deposition

摘要

Behaviors of carbon nanotubes (CNTs) in H{sub}2 atmosphere or CH{sub}4 + H{sub}2 mixtures transforming mechanism of CNTs to diamond embryo were investigated. Experimental results show that CNTs could be etched by H{sub}2 and transformed to carbon nanoparticles under conditions of hot-filament chemical vapor deposition. The mechanism can be concluded that CNTs were broken down by H{sub}2, transformed to carbon nanoparticles or shorter CNTs; on surface of carbon nanoparticles or end caps of CNTs diamond crystals were nucleated and grown up.