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

Figure 3

(a) STEM-HAADF images of Fe₃O₄/Ag hybrid NPs (FA-3); (b)–(d) EDS elemental mapping images of FA-3: (b) overlay, (c) Fe₃O₄ L map, and (d) Ag M map.

(a)

(b)

(c)

(d)