Raman and PL at the nanoscale: Why it's important for 2D materials

Presented by Andrey Krayev, US AFM-Raman Product Manager, HORIBA Scientific, in partnership with IOP/Physics World

From graphene to TMDCs and beyond, Raman spectroscopy and Raman imaging proved to be extremely useful for characterization of 2D materials and visualization of various heterogeneities that occur naturally or are created on purpose. Quite often the scale of structural, electronic or morphological heterogeneity in these materials is on the order of a few tens of nanometres or less, which is beyond the spatial resolution of conventional Raman microscopy. Tip enhanced Raman scattering (TERS) and tip enhanced photoluminescence (TEPL) can address the problem of spatial resolution.
In this webinar we’ll demonstrate how TERS can enable Raman imaging of MXenes, a new class of 2D materials; probe number of nanoscale heterogeneities in 2D crystals: growth related, including lateral and vertical heterostructures, substrate induced, and the morphological heterogeneities that appear (intentionally or not) in the process of exfoliation/2D crystal transfer. Finally, we’ll discuss recent results on TERS imaging of reconstructed Moiré patterns in twisted bilayers of graphene.