Spatially-resolved EEL studies of plasmons in silver filled carbon nanotubes using a dedicated STEM

U. Bangert, A. J. Harvey, A. Seepujak

Research output: Contribution to journalArticlepeer-review

Abstract

Using a dedicated FEG STEM, we present highly spatially-resolved electron energy-loss (EEL) studies of individual multi-walled carbon nanotubes (MWCNTs), each with the inner cavity possessing regions completely filled with silver. The transmission and attenuation of graphite π-collective mode E-fields through the MWCNT walls are established. Noticeable changes in the graphite π-surface mode are witnessed, concomitant with coupling of the silver Mie mode and the graphite π-surface mode. The resulting collective mode is significantly red-shifted to below 5 eV, with considerable intensity in the visible frequency regime. It appears that silver retains its ability to enhance E-fields when surrounded by a MWCNT. Present observations lead to the possibility of collective modes propagating on graphene monolayers being tuned in frequency by the presence of a metal.

Original languageEnglish
Article number012087
JournalJournal of Physics: Conference Series
Volume126
DOIs
Publication statusPublished - 2008
Externally publishedYes

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