Phonon spectromicroscopy of carbon nanostructures with atomic resolution

2020-01-19 04:12:19

carbon resolution atomic nanotubes phonon

责任者: Vitali, L.;Burghard, M.;Schneider, M.A.;Lei Liu;Wu, S.Y.;Jayanthi, C.S.;Kern, K. 单位: Max-Planck Inst. fur Festkorperforschung, Stuttgart, Germany 来源出处: Physical Review Letters(Phys. Rev. Lett. (USA)),24 Sept. 2004,93(13):136103-1 摘要: The vibrational properties of single-wall carbon nanotubes have been probed locally with atomic-scale resolution by inelastic electron tunneling spectroscopy with a low-temperature scanning tunneling microscope. The high spatial resolution has allowed the unraveling of changes in the local phonon spectrum related to topological defects. We demonstrated that the radial breathing mode is suppressed within tube segments of lengths below ~3 nm, and that in the cap region phonon modes characteristic of the fullerene hemisphere are emerging. Phonon spectromicroscopy should lead to a better understanding of the mechanisms that limit the transport of heat or electrical charge inside nanostructured carbon materials 关键词: carbon nanotubes;phonons;scanning tunnelling microscopy;tunnelling spectra;phonon spectromicroscopy;carbon nanostructures;atomic resolution;vibrational properties;single-wall carbon nanotubes;atomic scale resolution;low-temperature scanning tunneling microscope;local phonon spectrum;topological defects;radial breathing mode;tube segments;phonon modes characteristic;fullerene hemisphere;nanostructured carbon materials;C