Momentum-and space-resolved high-resolution electron energy loss spectroscopy of individual single-wall carbon nanotubes
Momentum-and space-resolved high-resolution electron energy loss spectroscopy of individual single-wall carbon nanotubes
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DOI：
10.1103/physrevb.95.195411
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发表时间：
2017-05-11
影响因子：
3.7
通讯作者：
Ramasse, Q. M.
中科院分区：
文献类型：
--
作者：
Hage, F. S.;Hardcastle, T. P.;Ramasse, Q. M.
通过观察单个单壁碳纳米管中p等离子体激元的限制，证明了在扫描透射电子显微镜中使用动量和空间分辨电子能量损失谱以高能量分辨率探测单个纳米物体的电子结构的能力。虽然垂直于管轴的限制被确定为所有调查管，平行于管轴的限制的可变程度归因于拓扑缺陷的浓度。空间分辨价损失谱允许识别的损失峰归因于手性依赖的径向带间跃迁。此外，仔细考虑的重要性的损失峰动量分散的空间分辨价损失谱的解释进行了讨论。
The ability to probe the electronic structure of individual nano-objects at high energy resolution using momentum-and space-resolved electron energy loss spectroscopy in the scanning transmission electron microscope is demonstrated through the observation of confinement of the p plasmon in individual single-wall carbon nanotubes. While confinement perpendicular to the tube axis was identified for all investigated tubes, a variable degree of confinement parallel to the tube axis was attributed to the concentration of topological defects. Spatially resolved valence loss spectra allowed for the identification of a loss peak attributed to a chirality-dependent radial interband transition. Furthermore, the importance of a careful consideration of loss peak momentum dispersions for the interpretation of spatially resolved valence loss spectra is discussed.