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题名: Effects of the Concentration of MgO in the Catalyst on the Growth of Carbon Nanotubes
作者: Li, Ming-Ji1;  Sun, Jia1;  Li, Hong-Ji;  Huang, Bao-Kun2;  Yang, Bao-He1
关键词: Carbon nanotubes ;  carbon nano-onion ;  MgO ;  Ni ;  RF-PECVD
刊名: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
发表日期: 2012
DOI: 10.1080/15421406.2012.688404
卷: 569, 页:1-9
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Crystallography
研究领域[WOS]: Crystallography
英文摘要: Carbon nanotubes (CNTs) were prepared on Si substrate by radio frequency plasma-enhanced chemical vapor deposition with Ni/MgO as catalyst. The morphology and microstructure of CNTs were characterized by X-ray diffraction, scanning electron microscopy, Raman spectroscopy, and transmission electron microscopy. The results show that with increasing MgO concentration in the catalyst the diameter of CNTs becomes smaller and more uniform and their purity and crystallinity are improved. Open or close carbon nano-onion structure is formed at the top of the CNTs, and the catalyst particles are found inside the tubes. With increasing MgO concentration, nanoparticles tend to nanowires longer than 30 nm for MgO concentration of 75% in the catalyst compund. These nanowires are made by Ni. Besides, when MgO concentration is 50%, the graphite layer of the bending tube wall extends inside of the tube, dividing the cavity into several irregularly shaped spaces, which forms a new carbon nanostructure.
关键词[WOS]: CHEMICAL-VAPOR-DEPOSITION ;  PARTICLE-SIZE ;  TIP-GROWTH ;  TEMPERATURE ;  MECHANISM
语种: 英语
WOS记录号: WOS:000311271500001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142953
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Tianjin Univ Technol, Tianjin Key Lab Film Elect & Communicate Devices, Sch Elect Informat Engn, Tianjin 300384, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian, Peoples R China

Recommended Citation:
Li, Ming-Ji,Sun, Jia,Li, Hong-Ji,et al. Effects of the Concentration of MgO in the Catalyst on the Growth of Carbon Nanotubes[J]. MOLECULAR CRYSTALS AND LIQUID CRYSTALS,2012,569:1-9.
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