Fig. 4
From: Microfluidic DNA-based potassium nanosensors for improved dialysis treatment
Normalized fluorescence intensity as a function of potassium concentration. a The fluorescence intensity of the nanosensor with a concentration of 1 µM was measured after adding 0 M (control), white circle, 1 µM, plus sign, 1 mM, square, and 10 mM, black circle, K+. b The peak normalized fluorescence intensity decreases with increased K+. PB + MgCl2 served as a control buffer