Green Synthesis of Fluorescent Ag Nanoclusters for Detecting Cu²⁺ Ions and Its “Switch-On” Sensing Application for GSH

Figure 3

(a) UV-Vis absorption spectrum of His (black), AgNO₃ (red), and the Ag NCs (blue) solution. (b) The PL excitation and emission spectra of the Ag NCs. The inset in (b) is the Ag NCs solution under natural light (left) and under ultraviolet (right). (c) Time-resolved fluorescence spectrum of the Ag NCs.

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