Identification of the constituents of double-walled carbon nanotubes using Raman spectra taken with different laser-excitation energies

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	Identification of the constituents of double-walled carbon nanotubes using Raman spectra taken with different laser-excitation energies
	F. Li; S. G. Chou; W. C. Ren; J. A. Gardecki; A. K. Swan; M. S. Unlu; B. B. Goldberg; H. M. Cheng; M. S. Dresselhaus
	2003
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	18 期号:5 页码:1251-1258
摘要	Double-walled carbon nanotubes (DWNTs), synthesized by the catalytic decomposition of methane, were explored by resonance Raman spectroscopy using different energies for laser excitation. Based on the radial breathing mode frequencies, the indices of the two layers of a DWNT were approximately assigned, depending on the interlayer separation of the two coaxial layers of the DWNT, which ranged from 0.34 to 0.40 nm. From the tentatively assigned results, it was found that the two walls of the DWNT are not strongly selected by chirality and diameter. The results, however, suggest that, for the tubes that are resonant with the available laser excitation energies, most of the outer layers of the observed DWNTs in our samples are semiconducting, while the inner layers of the observed DWNTs are either semiconducting or metallic based on the assembled DWNTs. The characteristics of the G, D, and G' band of the DWNTs are discussed, and a double peak feature in the D and G' band, originating from the inner and outer layers of the DWNTs, is reported.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. mit, dept chem, cambridge, ma 02139 usa. mit, george r harrison spect lab, cambridge, ma 02139 usa. boston univ, dept elect & comp engn, boston, ma 02215 usa.;cheng, hm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Scattering
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WOS记录号	WOS:000182586600033
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35884
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	F. Li,S. G. Chou,W. C. Ren,et al. Identification of the constituents of double-walled carbon nanotubes using Raman spectra taken with different laser-excitation energies[J]. Journal of Materials Research,2003,18(5):1251-1258.
APA	F. Li.,S. G. Chou.,W. C. Ren.,J. A. Gardecki.,A. K. Swan.,...&M. S. Dresselhaus.(2003).Identification of the constituents of double-walled carbon nanotubes using Raman spectra taken with different laser-excitation energies.Journal of Materials Research,18(5),1251-1258.
MLA	F. Li,et al."Identification of the constituents of double-walled carbon nanotubes using Raman spectra taken with different laser-excitation energies".Journal of Materials Research 18.5(2003):1251-1258.