Controllable fabrication and sensitive detection based on SERS substrates with Au nanocubes coated Fe_3O_4

摘要

Au nanocubes (NCs) coated Fe_3O_4 nanoparticles (Fe_3O_4/Au NPs) were designed and fabricated controllably via a facile method. The diameter of Au NCs in the surface of Fe_3O_4 was 65 nm, considering the appropriate size for Au NPs as surface-enhanced Raman scattering (SERS) substrates, which makes the Fe_3O_4/Au NPs used for pesticide analysis with high sensitivity.