Assignment of chiral vectors in carbon nanotubes
Assignment of chiral vectors in carbon nanotubes
复制标题
碳纳米管中手性向量的分配
DOI：
10.1103/physrevb.68.235404
复制
发表时间：
2003
影响因子：
3.7
通讯作者：
J. Kürti
中科院分区：
文献类型：
--
作者：
C. Kramberger;R. Pfeiffer;H. Kuzmany;V. Zólyomi;J. Kürti
Double-wall carbon nanotubes were derived from peapods by annealing at high temperature. We report on the Raman response of the radial breathing mode (RBM) of the inner tubes. As a consequence of their small diameter the Raman spectra of these tubes show well distinguishable lines, besides the usual broad response from the outer tubes. An algorithm was developed to find the best $(n,m)$ assignment for the observed lines. As a result of the assignment, we received ${\ensuremath{\nu}}_{\mathrm{RBM}}=233/d+14,$ ${\ensuremath{\nu}}_{\mathrm{RBM}}$ in ${\mathrm{cm}}^{\ensuremath{-}1}$ for the \ensuremath{\nu} versus $1/d$ relation, where $d$ is the tube diameter in nm. To bring the discrepancy between calculation of RBM frequencies and experiment to a minimum, the diameters were evaluated from density functional theory.
Double-wall carbon nanotubes were derived from peapods by annealing at high temperature. We report on the Raman response of the radial breathing mode (RBM) of the inner tubes. As a consequence of their small diameter the Raman spectra of these tubes show well distinguishable lines, besides the usual broad response from the outer tubes. An algorithm was developed to find the best $(n,m)$ assignment for the observed lines. As a result of the assignment, we received ${\ensuremath{\nu}}_{\mathrm{RBM}}=233/d+14,$ ${\ensuremath{\nu}}_{\mathrm{RBM}}$ in ${\mathrm{cm}}^{\ensuremath{-}1}$ for the \ensuremath{\nu} versus $1/d$ relation, where $d$ is the tube diameter in nm. To bring the discrepancy between calculation of RBM frequencies and experiment to a minimum, the diameters were evaluated from density functional theory.