Fig. 1. Schematic diagram and SEM characterization of fabricating AgNPs@PDMS and AgNPs@PDMS@ZIF-8 composite structures

Fig. 2. Raman test results and scatter plot of relationship between characteristic peak intensity at 611 cm^-1 and R6G concentration. (a) Raman test results of R6G with concentrations ranging from 10^-8 mol/L to 10^-12 mol/L; (b) scatter plot diagram of relationship between Raman spectral intensity and lg C (C is R6G concentration) at 611 cm^-1

Fig. 3. Repeatability and uniformity detection and pollutant molecular detection. (a) Raman Mapping measurements when R6G (10^-8 mol/L) dripped on samples AgNPs@PDMS; (b) Raman intensity at 611 cm^-1 and calculated RSD on samples AgNPs@PDMS; (c) results of thiram test at concentration of 10^-7 mol/L

Fig. 4. Adsorption and detection experiment of benzaldehyde gas. (a) Benzaldehyde adsorption schematic diagram; (b) results of benzaldehyde test

Fig. 5. Simulation results of x-y plane or x-z plane electromagnetic field of AgNPs@PDMS at different particle sizes of silver nanoparticles. (a) Simulation model; (b) 30 nm, x-y plane; (c) 30 nm, x-z plane; (d) 35 nm, x-y plane; (e) 35 nm, x-z plane; (f) 50 nm, x-y plane; (g) 50 nm, x-z plane; (h) 65 nm, x-y plane; (i) 65 nm, x-z plane

Fig. 6. Simulation results of x-y plane or x-z plane electromagnetic field of AgNPs@PDMS@ZIF-8 at different particle sizes of silver nanoparticles. (a) Simulation model; (b) 30 nm, x-y plane; (c) 30 nm, x-z plane; (d) 35 nm, x-y plane; (e) 35 nm, x-z plane; (f) 50 nm, x-y plane; (g) 50 nm, x-z plane; (h) 65 nm, x-y plane; (i) 65 nm, x-z plane

Fig. 7. Electromagnetic field simulation results of AgNPs@ZIF-8 with different thicknesses of ZIF-8 film. (a) Simulation model; (b) 0 nm; (c) 5 nm; (d) 10 nm; (e) 20 nm; (f) 30 nm