Tip-enhanced Raman spectroscopy resolved “resonance” Raman scattering with 1-nm resolution in ultrathin zinc oxide films epitaxially grown on a single-crystal silver surface. Tip-enhanced “resonance” Raman scattering can be used to investigate a specific chemical structure at nanoscale and even at the single-molecule level and also provides a new approach for the atomic-scale optical characterization of local electronic states. This will be a powerful tool to study, for instance, local defects in low-dimensional materials and active sites of heterogeneous catalysis.
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Source: Phys.org