Figure 4

(a) SERS spectra of 4-MBA based on FSZA with concentrations ranging from 10–3 to 10–10 M; (b) the 20 SERS spectra of 4-MBA molecules were collected on FSZA substrate; (c) SERS intensity of 4-MBA a t 1587 cm−1 of the 20 SERS spectra.
(a) SERS spectra of 4-MBA based on FSZA with concentrations ranging from 10–3 to 10–10 M; (b) the 20 SERS spectra of 4-MBA molecules were collected on FSZA substrate; (c) SERS intensity of 4-MBA a t 1587 cm−1 of the 20 SERS spectra.