Fig. 3From: Sensitivity and Reusability of SiO2 NRs@ Au NPs SERS Substrate in Trace Monochlorobiphenyl DetectionSEM morphology of SERS substrate samples fabricated by sputtering Au nanoparticles for 240 s on a vertical and b oblique SiO2 nanorods. c TEM morphology of SiO2 nanorods sputtered by Au for 240 s. The inset is the electron diffraction pattern of the sample. d HRTEM of Au nanoparticles decorated on SiO2 nanorodBack to article page