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. 2019 Sep 27;5(9):eaau4506. doi: 10.1126/sciadv.aau4506

Fig. 2. Correlative SEM, DFM, and Raman characterization of tetrameric metamolecules.

Fig. 2

(A) Schematic illustration of the fabrication procedure. L-AuNPs (80 nm) and dyes could be immobilized site-specifically on a rhombus-shaped super-origami through DNA hybridizations. (B) FDTD calculations for an 80-nm L-AuNP tetramer cluster. A hot spot is present in the green box. (C to E) Correlative SEM characterization (C), DFM characterization (D), and Raman mapping (E) of an 80-nm L-AuNP tetramer cluster. Six ROX (carboxy-X-rhodamine) molecules were placed in the hot spot shown in (B). a.u., arbitrary units.