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RRS spectra of the AuNPb-HAuCl4-H2O2 nanocatalytic system. (a) 4.48 µmol/L HAuCl4 + 0.67 mmol/L HCl + 3.33 mmol/L H2O2; (b) a + 0.018 ng/mL AuNPb; (c) a + 0.095 ng/mL AuNPb; (d) a + 1.9 ng/mL AuNPb; (e) a + 5.7 ng/mL AuNPb; (f) a + 7.6 ng/mL AuNPb; (g) a + 1.9 ng/mL AuNPb; (h) a + 5.7 ng/mL AuNPb; (i) a + 7.6 ng/mL AuNPb.
