Fluorescent Sensors Based on Organic Polymer-Capped Gold Nanoparticles for the Detection of Cr(VI) in Water

Figure 3

(a) Fluorescence photograph of F-hPEI-capped Au NPs upon different concentrations of Cr(VI): (1) 0, (2) 4.0 (3) 8.0, (4) 32, (5) 40, and (6) 80 μM. (b) Fluorescence photograph of F-hPEI-capped Au NPs upon different concentrations of Fe(II): (1) 0, (2) 2.9×10², (3) 5.8×10², (4) 8.6×10², (5) 1.2×10³, (6) 1.4×10³ μM, in the presence of 80 μM Cr(VI), and (7) the blank solution without Cr (VI) and Fe (II).

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