Figure 1 | Scientific Reports

Figure 1

From: Plasmon based biosensor for distinguishing different peptides mutation states

Figure 1

(a) SEM image of gold-based nanocuboid periodic SERS substrates with 2 × 2, 3 × 3 and 4 × 4 array size; (b) 3D-AFM image of 2 × 2, 3 × 3 and 4 × 4 array size SERS substrate; (c) Cartoon representation of gold-based nanocuboid structures is depicted with all the specifications (L = 80 nm, G = 20–500 nm and H = 25 nm).

Both, the electric field polarization with respect to the nanocuboid diagonal axis and the direction of incident light, are also indicated.

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