FDTD simulation study of size/gap and substrate-dependent SERS activity study of Au@SiO2 nanoparticles |
SEM images of Au@SiO2 NPs monolayer film on the silicon (a) and gold film (b). (c) Scheme for SERS detection with R6G molecules adsorbed in the gap between Au@SiO2 NPs and Si (curve |