摘要
利用高分辨电子显微镜研究了在高压退火条件下碳纳米管的微结构变化规律，发现在５５ＧＰａ下，７７０℃退火后即发生了明显的结构改变；在９５０℃退火２５ｍｉｎ后发现形成了类碳纳米洋葱和纳米碳条带结构．碳纳米管转变成类碳纳米洋葱可以分成几个步骤，首先碳纳米管破裂，然后形成碳纳米球，最后形成类碳纳米洋葱结构．
Abstract The microstructural transformations of carbon nanotubes under high pressure annealing have been studied by high resolution transmission electron microscopy. It is found that under 5.5GPa the microstructure of nanotubes has obviously changed at an annealing temperature of 770℃, while onion like and ribbon like structures formed at 950℃. The transformation from carbon nanotubes into quasi spherical onion occurs in several steps, first the shells of nanotubes collapse, then spheres form and finally onion like structures appear. The effects of high pressure and annealing temperature on microstructural changes are discussed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第2期270-274,共5页
Acta Physica Sinica
基金
中国博士后科学基金
