Fig. 7
The SPR spectra of AgNPs in aqueous solutions of the different concentrations of TX-100 (a) and plot of the absorbance intensity of AgNPs as a function of molar concentration of TX-100 at 410 nm (b). Conditions: conditions as in Fig. 1 except 2.0-mL KH2PO4 buffer solution (pH 7.5); appropriate volumes of TX-100 solutions of (a) 0.0, (b) 0.05, (c) 0.1, (d) 0.16, (e) 0.2, (f) 0.25, (f) 0.3, (g) 0.35, (h) 0.4, (i) 0.45, and (j) 0.5 mmol L−1