Controllable preparation and properties of single-/double-walled carbon nanotubes

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	Controllable preparation and properties of single-/double-walled carbon nanotubes
	Xie, SS ; Song, L ; Ci, LJ ; Zhou, ZP ; Dou, XY ; Zhou, WY ; Wang, G ; Sun, LF
刊名	SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
	2005
卷号	6 期号:7 页码:725
关键词	CHEMICAL-VAPOR-DEPOSITION POLARIZED RAMAN-SPECTROSCOPY ARC-DISCHARGE CATALYTIC DECOMPOSITION DIAMETER DISTRIBUTION METAL PARTICLES GAS-PHASE GROWTH TEMPERATURE SCATTERING
ISSN号	1468-6996
通讯作者	Xie, SS: Chinese Acad Sci, Ctr Condensed Matter Phys, Grp A05, Inst Phys, POB 603, Beijing 100080, Peoples R China.
中文摘要	In this paper, we discussed recent studies done in our laboratories with a floating catalyst chemical vapor deposition (CVD) method. We can grow single- or double-walled carbon nanotubes (SWNTs/DWNTs) with different kinds of catalysts. Single-walled carbon nanotubes without amorphous carbon coating were prepared by thermally decomposing acetylene (C2H2) at the temperature range of 750-1200 degrees C with ferrocene as catalyst. While with sulfur promoted ferrocene catalyst, double-walled carbon nanotubes were mass-produced by pyrolizing C2H2 at the temperature range of 900-1100 degrees C. Furthermore, tunable growth of DWNTs with different diameter was achieved in our experiment. It is found that DWNTs produced at lower carbon partial pressure have much smaller inner tubes, even DWNTs with the smallest inner diameter of 0.4 nnn was found in here. As convenient and effective tool, radial breathing mode (RBM) of Raman scattering technique can be used to distinguish SWNTs from DWNTs. In further studies of Raman scattering with DWNTs, the possible match of the inner tubes and the outer tubes according to the RBM bands was assigned, and different chirality types were discussed according to the diameter and chirality dependence of resonant Raman vibration. We also investigated the temperature-dependent frequency shift of resonant Raman spectra of DWNTs in the range of 78-650 K. We found that different RBM peaks, which are relative to different tube diameters, have different temperature coefficient of frequency shift, and the larger diameter carbon nanotubes have more RBM frequency downshift with increasing temperature. It is ascribed to the RBM frequency variation to the temperature dependence of the stretching force constant of C-C bond. Besides, Polarized Raman spectra were preformed on well-aligned SWNTs structure fabricated through post-growth method and found that the angular dependence of Raman intensity is consistent well with the predictions of the resonance Raman theory. (c) 2005 Elsevier Ltd. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/35118]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Xie, SS,Song, L,Ci, LJ,et al. Controllable preparation and properties of single-/double-walled carbon nanotubes[J]. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS,2005,6(7):725.
APA	Xie, SS.,Song, L.,Ci, LJ.,Zhou, ZP.,Dou, XY.,...&Sun, LF.(2005).Controllable preparation and properties of single-/double-walled carbon nanotubes.SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS,6(7),725.
MLA	Xie, SS,et al."Controllable preparation and properties of single-/double-walled carbon nanotubes".SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 6.7(2005):725.