Probing hotspots of plasmon-enhanced Raman scattering by nanomanipulation of carbon nanotubes
Open access
Date
2018-11-16Type
- Journal Article
Abstract
We present a two-step procedure to probe hotspots of plasmon-enhanced Raman scattering with carbon nanotubes (CNTs). Dielectrophoretic deposition places a small CNT bundle on top of a plasmonic Au nanodimer. After 'pre-characterizing' both the nanotubes and dimer structure, we subsequently use the tip of an atomic force microscope to push the bundle into the plasmonic hotspot located in the 25 nm wide dimer gap, characterize its location inside the gap, and observe the onset of plasmon-enhanced Raman scattering. Evidence for the activation of the CNT's double-resonant D-mode by the near-field of the plasmonic hotspot is discussed. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000295626Publication status
publishedExternal links
Journal / series
NanotechnologyVolume
Pages / Article No.
Publisher
IOP PublishingSubject
Plasmon-enhanced Raman scattering; Carbon nanotubes; Plasmonic hotspot nano-manipulationMore
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