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

Figure 6

(a) Fluorescence response of the Ag NCs upon addition of different concentrations of Fe³⁺ from top to bottom: 0 mM, 0.1 mM, 0.2 mM, 0.4 mM, 0.6 mM, 0.8 mM, 1 mM, and 5 mM. (b) The linear calibration ranges of the fluorescence intensity ratio to Fe³⁺ concentrations.

(a)

(b)