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. Author manuscript; available in PMC: 2013 Jan 25.
Published in final edited form as: J Am Chem Soc. 2012 Jan 13;134(3):1699–1709. doi: 10.1021/ja2088713

Figure 5.

Figure 5

SERS of NP-NRs assemblies with SERS reporter molecule made from (A) NPs-ASY2 modified with 4-ATP; (B) NR-ASY1 modified with 4-ATP. Non-assembled samples were made from NP modified with non-complementary “Helper” ssDNA and NR carrying ASY1 with the molar ratio of 11. (C, D) Dependence of SERS intensity on the average number of NPs assembled with NRs for plots in A and B, respectively. (E) Schematic representation of the End assemblies with NRs modified with 4-ATP; (F–H) Finite-difference time-domain (FDTD) simulation of plasmonic properties for (F) End, (G), Side and (H) Satellite assemblies; excitation wavelength is 632.8 nm; the gap between NRs and NP is 8 nm.