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提出一个根据拉曼基频模及其倍频模的斯托克斯和反斯托克斯拉曼成分的不同共振行为来探测样品与激光共振的系统能级的方法.此方法被应用到不均匀单壁碳纳米管束样品中某一径向呼吸模频率为219波数的金属型碳纳米管.通过分析呼吸模及其倍频模和切向模的共振行为,获得了该碳纳米管的电子跃迁能量,并获得纳米管C-C最近邻重叠积分因子为2.80eV.此数值可以很好的解释单壁碳纳米管径向呼吸模的共振行为.
A method to detect the system energy level of sample and laser resonance based on the different resonance behaviors of Stokes and anti-Stokes Raman components of Ramanki and its frequency-doubling modes is proposed. This method is applied to In a sample of uniform SWCNTs, a metal carbon nanotube with a radial respiratory frequency of 219 wavenumbers was obtained. By analyzing the resonant modes of the respiration mode, its frequency doubling mode and the tangential mode, the electronic properties of the carbon nanotubes Transition energy and obtain the nearest neighbor overlap superposition factor of nanotube CC of 2.80 eV. This value can well explain the resonance behavior of the radial breathing mode of single-walled carbon nanotubes.