“Turn-Off” Fluorescent Sensor for Pamidronate Disodium and Zoledronic Acid Based on Newly Synthesized Carbon Dots from Black Tea

Figure 1

(a) UV-Vis spectrum of CDs (black line) and excitation-dependent of the CD fluorescence in water at room temperature. (b) The photograph of the CD solution under UV light of 365?nm (left) and under visible light (right). (c) FTIR spectra of CDs and (d) HRTEM images of CDs.

(a)

(b)

(c)

(d)