Figure 4: Structure-to-function optical characterization of the three 2D plasmonic superlattices. | Nature Communications

Figure 4: Structure-to-function optical characterization of the three 2D plasmonic superlattices.

From: Nanoscale surface chemistry directs the tunable assembly of silver octahedra into three two-dimensional plasmonic superlattices

Figure 4

(a,b) Bending the ∼60 cm2 flexible PDMS film of standing octahedra superlattice (a) leads to unique colour changes (b). (c,d) SERS spectra (c) and EFs (d) of 4-MBT from the three superlattices. Error bars in (d) are s.d. of 10 measurements (area of each measurement is 60 × 3 μm2). The low-packing density square superlattice of standing octahedra is an order of magnitude more efficient than the hexagonal lattices. (e) Localized electromagnetic field distributions of the three superlattices. All scale bars, 100 nm. Large-area plasmonic ‘hotstrips’ in the square superlattice is observed. 4-MBT, 4-methylbenzenthiol.

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