多壁碳纳米管在循环相变过程中结构变化初探  

Preliminary structural study of multi-wall carbon nanotubesin a returning phase transition process

作　　者：王震遐[1] 王森[1] 胡建刚[1] 俞国军[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800

出　　处：《物理学报》2005年第9期4263-4268,共6页Acta Physica Sinica

基　　金：中国科学院知识创新工程重要方向项目(批准号:10375085)资助的课题~~

摘　　要：对由离子束辐照多壁碳纳米管(MWCNTs)产生的无定形碳纳米线(ACNWs)进行了高温退火(2400℃)处理,通过透射电子显微镜(TEM)观察发现,ACNWs体部转变成与原来MWCNTs相似的管状石墨结构,而其封端区域的石墨晶体结构形态却与原来的MWCNTs完全不同,且变化多端.基于实验结果,对其相变过程机理提出了一个概念性的模型.In this work, amorphous carbon nanowires （ACNWs）, formed during ion irradiating multi-wall carbon nanotubes （MWCNTs）, were annealed at a high temperature of 2400℃. Transmission electron microscopy observations revealed that the body of ACNWs had transformed to a tube-like structure similar to that of the original MWCNTs, but the tip structure had various forms and was quite different from the original MWCNTs. Based on the results, we proposed a conceptual model of phase transition mechanism.

关 键 词：无定形碳纳米线 高温退火 相变 透射电子显微镜 多壁碳纳米管 相变过程 结构变化 透射电子显微镜 循环 离子束辐照 无定形碳 石墨结构 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ586.1[化学工程—精细化工]