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SPR band ratios (R: A580/A530) to evaluate the catalytic effects of the H-AuNS probe (■) on AuNP growth without (■) and with (▲) of Hg(II) (1.0 μM) in the presence of HCl/Au(III)/H2O2 solution, at different volumes of (a) H-AuNSs, (b) HCl, (c) Au(III), and (d) H2O2. Error bars represent standard deviations from three repeated experiments.
