Resonant Raman Spectroscopy of Individual Strained Single-Wall Carbon Nanotubes

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• 作者：Xiaojie Duan ; Hyungbin Son ; Bo Gao ; Jin Zhang ; Tianjiao Wu ; Georgy G. Samsonidze ; Mildred S. Dresselhaus ; Zhongfan Liu ; Jing Kong
• 刊名：Nano Letters
• 出版年：2007
• 出版时间：July 2007
• 年：2007
• 卷：7
• 期：7
• 页码：2116 - 2121
• 全文大小：274K
• 年卷期：v.7,no.7(July 2007)
• ISSN：1530-6992

文摘

Resonance Raman spectra of individual strained ultralong single-wall carbon nanotubes (SWNTs) are studied. Torsional and uniaxial strainsare introduced by atomic force microscopy manipulation. Torsional strain strongly affects the Raman spectra, inducing a large downshift inthe E₂ symmetry mode in the G⁺ band, but a slight upshift for the rest of the G modes and also an upshift in the radial breathing mode (RBM).Whereas uniaxial strain has no effect on the frequency of either the E₂ symmetry mode in the G⁺ band or the RBM, it downshifts the rest ofthe G modes. The Raman intensity change reflects the effect of these strains on the SWNT electronic band structure.