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. Author manuscript; available in PMC: 2010 May 4.
Published in final edited form as: Nano Lett. 2008 Jul 1;8(8):2245–2252. doi: 10.1021/nl080872f

Figure 5.

Figure 5

Resonant scattering as NPs are spaced with increasing distance (0-22.3 nm via polyelectrolyte spacers) from the gold film. (A) Single NP scattering (top, color images; bottom, normalized spectra) when NP-film is illuminated with dark-field illumination shows a blue shift with increasing distance of the NP from the gold film, indicative of the LSP resonance. (B) Single NP scattering (from the same NPs as those in (A)) when NP-film is illuminated with an evanescent field from a 45° incidence TIR shows a more complex spectral shift, which reflects the convoluted SPP-LSP resonances. Spectra amplitudes are normalized.