Jorio A, Saito R, Hafner J H, Lieber C M, Hunter M, McClure T, Dresselhaus G, Dresselhaus M S
Department de Physics, Massachusetts Institutr of Technology, Cambridge 02139, USA.
Phys Rev Lett. 2001 Feb 5;86(6):1118-21. doi: 10.1103/PhysRevLett.86.1118.
We show that the Raman scattering technique can give complete structural information for one-dimensional systems, such as carbon nanotubes. Resonant confocal micro-Raman spectroscopy of an (n,m) individual single-wall nanotube makes it possible to assign its chirality uniquely by measuring one radial breathing mode frequency omega(RBM) and using the theory of resonant transitions. A unique chirality assignment can be made for both metallic and semiconducting nanotubes of diameter d(t), using the parameters gamma(0) = 2.9 eV and omega(RBM) = 248/d(t). For example, the strong RBM intensity observed at 156 cm(-1) for 785 nm laser excitation is assigned to the (13,10) metallic chiral nanotube on a Si/SiO2 surface.
我们表明，拉曼散射技术能够为一维系统（如碳纳米管）提供完整的结构信息。对一根（n,m）单壁纳米管进行共振共焦显微拉曼光谱分析，通过测量一个径向呼吸模式频率ω(RBM)并运用共振跃迁理论，就能够唯一地确定其手性。利用参数γ(0)=2.9电子伏特和ω(RBM)=248/d(t)，可以对直径为d(t)的金属型和半导体型纳米管进行唯一的手性确定。例如，在785纳米激光激发下于156厘米⁻¹处观测到的强RBM强度，被确定为硅/二氧化硅表面上的（13,10）金属型手性纳米管。
