Figure 1
From: Gold nanozyme-based paper chip for colorimetric detection of mercury ions
Schematic illustration of the AuNZ-PAD colorimetric sensing mechanism for Hg2+ ions based on the mercury-promoted nanozyme activity of AuNPs. When Hg2+ ions are introduced onto the AuNZ-PAD, the TMB–H2O2 catalytic reaction is highly enhanced by the formation of Au–Hg amalgam, resulting in blue staining of the paper chip.
