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. Author manuscript; available in PMC: 2016 Aug 12.
Published in final edited form as: Nano Lett. 2015 Jul 6;15(8):5349–5357. doi: 10.1021/acs.nanolett.5b01725

Figure 1.

Figure 1

(a) Model of Plasmon Rulers PR1-3. The inset shows details of the PR tethers. PR1: 30 bps dsDNA; PR2: 52 bps dsDNA; PR3: ssDNA/dsDNA hybrid (see text). (b) Schematic of the experimental approach. PRs are confined to a two-dimensional lipid monolayer assembled on a decane cushion. Fluctuations in the interparticle separation of individual PRs result in spectral shifts that are monitored by ratiometric imaging. (c) Microscope set-up and representative images of PR2 on the 530nm (green) and 585nm (red) channel. (d) PR scattering spectrum (average of 20 PR3s, black line) and transmission spectra of the 40 nm bandpass filters centered at 530nm (green) and 585nm (red).