Abstract
Positron lifetime spectra for multiwall carbon nanotubes doped with the alkali metals, K, Rb and Cs, are found to consist of a single component with a lifetime of 0.36 ns at 280 K, independent of the alkali metal. The shorter lifetime than in pristine carbon nanotubes (0.382 ns) demonstrates positron annihilation at a site of higher electron density. We conclude that all positrons injected into alkali metal-doped carbon nanotubes annihilate at positron-trapping centers, derived probably from extended lattice defects located on their negatively-charged graphitic shells.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
