Preparation, morphology, and microstructure of diameter-controllable vapor-grown carbon nanofibers

被引:76
作者
Fan, YY [1 ]
Li, F [1 ]
Cheng, HM [1 ]
Su, G [1 ]
Yu, YD [1 ]
Shen, ZH [1 ]
机构
[1] Chinese Acad Sci, Inst Met Res, Shenyang 110015, Peoples R China
基金
中国国家自然科学基金;
关键词
D O I
10.1557/JMR.1998.0327
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Pure vapor-grown carbon nanofibers (VGCNF's) with controllable diameters of 10-200 nm were prepared by an improved floating catalyst method. Through transmission electron microscopy (TEM) observation, it was found that VGCNF's have a duplex structure, a hollow and high-crystallinity graphite filament called primary carbon fiber surrounded by a pyrocarbon layer with low graphite crystallinity. It was observed using high-resolution TEM that VGCNF's have excellent graphitic crystallinity with graphite layers stacked neatly parallel to fiber axis. Moreover, x-ray diffraction results showed that the graphitic crystallinity of carbon fibers became higher with decreasing diameter of carbon fibers.
引用
收藏
页码:2342 / 2346
页数:5
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