非共振条件下单壁碳纳米管拉曼散射强度的计算  

Baman scattering intensity of single-wall carbon nanotubes

作　　者：吴延昭[1] 于平[1] 王玉芳[1] 金庆华[1] 丁大同[1] 蓝国祥[1] 

机构地区：[1]南开大学物理科学学院,天津300071

出　　处：《物理学报》2005年第11期5262-5268,共7页Acta Physica Sinica

基　　金：国家重点基础研究发展规划(批准号:2002CB211800);基础研究重大项目前期研究专项基金(批准号:2001CCA05000)资助的课题.~~

摘　　要：利用非共振情况下的键极化模型理论,对单壁碳纳米管的拉曼光谱强度进行了研究.考察了碳纳米管结构、入射光和散射光的偏振方向以及管轴的取向对散射光强度的影响.计算结果表明,光的偏振方向对拉曼散射强度影响较大,而手性对拉曼光谱的影响较小.针对碳管样品的实际情况,给出了无规取向碳管的拉曼散射光谱.A study based on non-resonant bond polrizability model is maded on the Raman scattering intensity of single-wall carbon nanotube. The structure of nanotube, polarization of light and sample orientation dependence of the Raman intensity was discussed by varying the direction of the nanotube axis. It is found that the polarization of light have large effect on the Raman spectra, while the chirality of the carbon nanotube has little effect. The chirality and diameter dependence of the Raman intensity were calculated using the theory of randomly oriented particles.

关 键 词：碳纳米管 拉曼散射 声子 键极化 单壁碳纳米管 拉曼光谱强度 计算结果 散射强度 共振条件 拉曼散射光谱 散射光强度 偏振方向 纳米管结构 

分 类 号：TB383[一般工业技术—材料科学与工程]