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. Author manuscript; available in PMC: 2014 Feb 21.
Published in final edited form as: Chem Soc Rev. 2014 Feb 21;43(4):1248–1262. doi: 10.1039/c3cs60258c

Fig. 10.

Fig. 10

(a) Simultaneously recorded topographic (upper panel) and near-field optical images (lower panel). Laser power: 170 μW. Tip-sample distance: 3 nm. (b) Line profile through the topographic image with its correlated optical intensity. Strongest emission dominated by PL from the DIP film is observed at terraces. Emission spectra show additional characteristic Raman bands of DIP and a broad PL background from the gold tip used in the experiment (Reprinted with permission from D. Zhang et al. Phys. Rev. Lett., 2010, 104, 056601. Copyright (2010) by the American Physical Society.).