Highly Selective Hg (II) Ion Detection Based on Linear Blue-Shift of the Maximum Absorption Wavelength of Silver Nanoparticles
Figure 1
The absorption spectrum of AgNPs in the absence and presence of Hg (II) ion. (The inset picture displays color change corresponding to the curves: the solution color gradually changed from yellow to colorless.) Concentration: AgNPs: 6.5 × 10−5 mol/L; Hg (II) ion (from 1 curve to 5, ×10−6 mol/L): 0, 1.2, 3.2, 4.8, 6.0; HAc-NaAc buffer (pH 5.6).
