Plasmon-coupled Charge Transfer in FSZA Core-shell Microspheres with High SERS Activity and Pesticide Detection

A commercial SERS substrate does not only require strong enhancement, but also can be reused and recycled in actual application. Herein, Fe 3 O 4 /SiO 2 /ZnO/Ag (FSZA) have been synthesised, which consisted of Fe 3 O 4 core with strong magnetic field response and an intermediate SiO 2 layer as an electronic barrier to keep the stability of magnetite particles and outer ZnO and Ag as the effective layers for detecting pollutants. The SERS...