Figure 7

(a) UV–vis absorption spectra of KgM-AgNPs under Hg²⁺ charging from 0.00–60.0 µM, inset shows the photo images from 0.00–60.0 µM, in a clockwise direction (b) Plot of A₃₆₀/A₄₀₈ vs Hg²⁺ concentration from 0.00–60.0 µM (c) Plot of A₃₆₀/A₄₀₈ vs Hg²⁺ showing linearity within 0.010–10.0 µM Hg²⁺ (d) Plot of A₃₆₀/A₄₀₈ vs Hg²⁺ showing linearity within 10.0–60.0 µM of Hg²⁺.