Fig. 8. (a) Effects of aggregation time of AuNPs induced by NaCl on A₆₅₀/A₅₂₀ of AuNPs: 11 nM AuNPs, 300 mM NaCl. (b) Effects of binding time of aptamer with AuNPs on the fluorescence intensity of the system: 11 nM AuNPs, 400 nM aptamer, 300 mM NaCl, 250 μM RB. (c) Effects of the binding time of acetamiprid with the aptamer on the fluorescence intensity of the system: 11 nM AuNPs, 400 nM aptamer, 300 mM NaCl, 250 μM RB, 3 μg mL⁻¹ acetamiprid.