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. 2020 Jun 22;20(12):3523. doi: 10.3390/s20123523

Figure 2.

Figure 2

SERS spectra of (i) SiO2 NPs, (ii) SiO2@Ag NPs, and (iii) SiO2@Ag NPs treated with 10 µM AOH. All spectra are offset for the ease of comparison.