Figure 3.
(a) SERS spectra and (b) SERS intensity of SiO2@Au@Ag@4-MPBA, and (c) SERS intensity ratio of I390/417, I1170/1077, I1597/1583 toward various concentration of H2O2 from 10 pg/mL to 1 mg/mL in PBST pH 7.0.
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