High-Sensitivity Biosensor-Based Enhanced SPR by ZnO/MoS₂ Nanowires Array Layer with Graphene Oxide Nanosheet

Figure 4

SPR spectrum for different thicknesses of Au layer for d = 40 nm (curves A1 and A2), 45 nm (curves B1 and B2), 50 nm (curves C1 and C2), and 60 nm (curves D1 and D2), as the case of n = 1.30 and n = 1.38 for sensing medium. The curves A1, B1, C1, and D1 stand for the refractive index of sensing layer n = 1.30, the curves A2, B2, C2, and D2 stands for the refractive index of sensing layer n = 1.38. The thickness is 15 nm, 10 nm, 1 × 0.65 nm, and 3 × 1.6 nm for TiO₂, ZnO, MoS₂, and GO layer, respectively.