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. 2020 Sep 1;10(9):113. doi: 10.3390/bios10090113

Figure 1.

Figure 1

(A) Color changes of the solution under different conditions. The “+” indicates the presence of the corresponding substance. (B) Absorption spectra of the catalytic AuNP solution under different conditions. The final concentrations of I and cysteine were 5 μM and 50 μM, respectively.