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. 2020 May 24;15:117. doi: 10.1186/s11671-020-03347-4

Fig. 5.

Fig. 5

a Time-dependent UV-vis absorption spectra of the reduction of 4-NP by NaBH4 in the presence of dendritic Au/Ag bimetallic nanostructures (Ag180s-Au90s). b Plots of -ln(A/A0) at λ = 400 nm as a function of reaction time in the presence of catalysts with the same area