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(A) PL quenching efficiencies of CD-micelles (1.6 mg mL−1) in the presence of various metal ions (100 μM). (B) PL quenching efficiencies of CD-micelles against Co2+ (0–40 μM). (C) The Stern–Volmer plot of CD-micelles against Co2+. (D) Fluorescence lifetime decay curves of CD-micelles with and without Co2+. (E) The HRTEM images of CD-micelles with Co2+ and their size distribution. (F) Energy dispersive X-ray spectrometry mapping images of CD-micelles with Co2+.
