(A) TEM images and (B) DLS characterization of FA-CSC-NPs. (C) UV–Vis absorption spectra of CPT,CR-(SS-CPT)2, CR, and FA-CSC-NPs. (D) The temperature profiles of FA-CSC-NPs, CR-(SS-CPT)2, CR and PBS upon the continuous laser irradiation. (E) NIR-triggered release of CPT from FA-CSC-NPs. The samples were irradiated with an NIR laser (1 W/cm2) for 5 min at different time points as indicated by the arrows. Error bars were based on at least triplicated measurements. (F) In vitro drug release from FA-CSC-NPs under different GSH concentration versus drug or dye release from CPT-NPs and CR-NPs.