摘要
Using carbon nanotubes as nanobarriers,the growth of single-walled carbon nanotubes(SWNTs)on a quartz surface can be terminated.First,carbon nanotube nanobarriers were grown on a quartz surface by the gas ow-directed growth mode.Then,the SWNTs were grown on the quartz surface via the lattice-oriented growth mode,in which growth of SWNTs can be terminated by hitting the nanotube nanobarriers.Moreover,using the carbon nanotube nanobarrier as a marker,the mechanism of the growth of SWNTs on the quartz surface can be studied;a base-growth mechanism is indicated.Based on this termination process and the base-growth mechanism,SWNT arrays with controlled lengths can be grown on a quartz surface by xing the sites of bothcatalysts and nanobarriers.
基金
by the National Science Foundation of China(20673004,20725307,and 50821061)
Ministry of Science and Technology of China(2006CB932701,2006CB932403,and 2007CB936203).C.Q.Feng acknowledges Mr.L.M.Xie(Peking University)for his useful discussion.