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Appearance of radial breathing modes in Raman spectra of multi-walled carbon nanotubes upon laser illumination

机译:激光辐照下多壁碳纳米管的拉曼光谱中径向呼吸模式的出现

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The Raman spectra of the multi-walled carbon nanotubes are studied with the laser power of 5-20 mW. We observe the Raman bands at similar to 1352, 1581, 1607, and 2700 cm(-1) with 5 mW laser power. As the laser power is increased to 10, 15 and 20 mW, the radial breathing modes (RBMs) of the single wall carbon nanotubes (SWNTs) appear in the range 200 - 610 cm(-1). The diameter corresponding to the highest RBM is similar to 0.37 nm, the lowest reported so far. The RBMs are attributed to the local synthesis of the SWNTs at the top surface of the samples at higher laser power. (C) 2008 Elsevier B.V. All rights reserved.
机译:以5-20 mW的激光功率研究了多壁碳纳米管的拉曼光谱。我们用5 mW的激光功率观察到了类似于1352、1581、1607和2700 cm(-1)的拉曼波段。随着激光功率增加到10、15和20 mW,单壁碳纳米管(SWNT)的径向呼吸模式(RBM)出现在200-610 cm(-1)的范围内。对应于最大RBM的直径类似于0.37 nm,是迄今为止报道的最小直径。 RBM归因于在较高激光功率下样品顶部表面上SWNT的局部合成。 (C)2008 Elsevier B.V.保留所有权利。

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