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

Hage, F.S., Hardcastle, T.P., Scott, A.J., Brydson, R. and Ramasse, Q.M. (2017) Momentum- and space-resolved high-resolution electron energy loss spectroscopy of individual single-wall carbon nanotubes. Physical Review B, 95(19), 195411. (doi: 10.1103/PhysRevB.95.195411)

Abstract

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 π 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.

• Item Type: Articles
• Additional Information: SuperSTEM is the UK Engineering and Physical Sciences Research Council (EPSRC) National Facility for Aberration Corrected STEM. T.P.H. gratefully acknowledges the EPSRC Doctoral Prize Fellowship which funded this research.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Hage, Dr Fredrik Sydow
• Authors: Hage, F.S., Hardcastle, T.P., Scott, A.J., Brydson, R., and Ramasse, Q.M.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review B
• Publisher: American Physical Society
• ISSN: 2469-9950
• ISSN (Online): 2469-9969
• Copyright Holders: Copyright © 2017 American Physical Society
• First Published: First published in Physical Review B 95(19):195411
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher