ABSTRACT
Sp2-hybridized carbon nanomaterials such as graphene and carbon nanotubes feature unique electronic and vibronic characteristics.
Consisting of a single type of element only, they can also help in un-
derstanding how structure and dimensionality determine solid state
properties including electron and phonon dispersion. While Raman
spectroscopy is very well suited for studying these phenomena,
local structural variations, defects, and perturbations remain hidden
in conventional microscopy studies due to the resolution limit
imposed by diffraction. Tip-enhanced Raman spectroscopy (TERS)
overcomes this limitation providing nanoscale spatial resolution
and improved detection sensitivity. In this chapter we illustrate the
main principles of TERS, possible experimental implementations,
and review several recent applications to carbon nanotubes and
graphene.
