Magnetic Fe₃O₄/Ag Hybrid Nanoparticles as Surface-Enhanced Raman Scattering Substrate for Trace Analysis of Furazolidone in Fish Feeds

Figure 6

SERS spectra of (a) 500 ng mL⁻¹ and (b) 100 ng mL⁻¹ furazolidone molecules adsorbed on the FA-3 substrates prepared by magnetically directed self-assembly method (curve A) and nonmagnetic force (curve B). (The inset was the mean Raman intensity at 1348 cm⁻¹ corresponding to curves A and B.)

(a)

(b)