CAJ | 학술논문

从理论和实验角度研究了金属-碳协同催化的化学气相沉积反应中碳纳米管的成核和生长过程.结果表明:多壁碳纳米管的成核和生长不仅受金属的催化作用,碳核一旦形成也会促进碳纳米管向轴向和径向的生长.金属催化剂颗粒仅仅在促进最内层碳核的形成及生长,碳原子向有序的石墨结构转化有催化作用.多壁碳纳米管和单壁碳纳米管形成的本质区别在于是否存在碳的自催化作用.
종이론화실험각도연구료금속-탄협동최화적화학기상침적반응중탄납미관적성핵화생장과정.결과표명:다벽탄납미관적성핵화생장불부수금속적최화작용,탄핵일단형성야회촉진탄납미관향축향화경향적생장.금속최화제과립부부재촉진최내층탄핵적형성급생장,탄원자향유서적석묵결구전화유최화작용.다벽탄납미관화단벽탄납미관형성적본질구별재우시부존재탄적자최화작용.
The nucleation and growth of carbon nanotubes (CNTs) using chemical vapor deposition with a metal-carbon catalyst have been studied experimentally and theoretically.Results suggest that the nucleation and growth of multiwalled CNTs are not due to the metal alone,but that carbon nuclei (once formed) also contribute to radial and axial growth.Metal particles mainly promote the nucleation and growth of the innermost carbon shell(s),and catalyze the ordering of the carbon atoms to form graphene structures.The intrinsic difference between multiwalled CNT formation and single-walled CNT formation seems to be associated with a self-catalytic function of carbon nuclei.