Momentum-and space-resolved high-resolution electron energy loss spectroscopy of individual single-wall carbon nanotubes

Article

关键词: GRAPHENE TUBULES;    MICROTUBULES;    DIFFRACTION;    TRANSITIONS;    MICROSCOPE;    MONOLAYER;    PLASMONS;    DEFECTS;    SPECTRA;    OBJECTS;   

DOI  :  10.1103/PhysRevB.95.195411

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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