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

Figure 4

Selectivity patterns of the Ag NCs to Cu²⁺ at pH = 4.3 (a) and Fe³⁺ at pH = 7 (b). All metal ions concentrations were 100 μM.

(a)

(b)