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. 2021 Mar 25;21(7):2290. doi: 10.3390/s21072290

Figure 4.

Figure 4

UV−Vis spectra of AuNPs synthesized with various reagent concentrations: (a) 0.1% HAuCl4, 3 × 10−2 M glucose and various concentrations of NaOH; (b) 0.1% HAuCl4, 10−2 M NaOH and various concentrations of glucose.