Rapid Colorimetric Detection of Hg (II) Based on Hg (II)-Induced Suppressed Enzyme-Like Reduction of 4-Nitrophenol by Au@ZnO/Fe3O4 in a Cosmetic Skin Product

<div>Sensitivity of Au@ZnO/Fe3O4 towards Hg2+. (a) Absorption spectra of 4-NP under varying concentrations of Hg2+ (0–20 nM). (b) Calibration curve of absorbance variation versus the concentration of Hg2+ added (the linear relationship between absorption signal and Hg2+ concentration.).</div>

Nanomaterials and Nanotechnology

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Figure 8

Figure 8: Rapid Colorimetric Detection of Hg (II) Based on Hg (II)-Induced Suppressed Enzyme-Like Reduction of 4-Nitrophenol by Au@ZnO/Fe3O4 in a Cosmetic Skin Product

Figure 8 | Rapid Colorimetric Detection of Hg (II) Based on Hg (II)-Induced Suppressed Enzyme-Like Reduction of 4-Nitrophenol by Au@ZnO/Fe3O4 in a Cosmetic Skin Product 