Fig. 5. (A) The SERS intensity bands at 1078 cm⁻¹ with varying Ag metal thickness (5 nm, 8 nm, 10 nm, 15 nm and 20 nm) for all analyzed SERS surfaces (named 1m, 1, 2, and 3-type, respectively). (B) The intensity of the band at 1078 cm⁻¹ for the most sensitive 1m-type SERS substrate.