Fig. 2
From: Sensitivity and Reusability of SiO2 NRs@ Au NPs SERS Substrate in Trace Monochlorobiphenyl Detection
SERS spectra of 1 × 10−4 M BPE adsorbed on substrates of a vertical and b oblique SiO2 nanorods sputtered with Au nanoparticles for 60, 90,…, 360 s. c Intensity of characteristic Raman peak of BPE at 1200 cm−1 measured with all kinds of SERS substrate samples. d SERS spectra of 1 × 10−6, 1 × 10−7, 1 × 10−8, and 1 × 10−9 M BPE measured with the vertical SiO2 NRs@ Au NPs SERS substrate whose Au sputtering time is 240 s. All of the spectra were average data of spectra measured on five positions randomly selected on each SERS substrate