Fig. 2

Photothermal response abilities of MGCN. A. UV–vis absorption spectra of HPI, free ICG, PEG and HA. Absorption of (B) free ICG and (C) nanocomplexes. ICG and nanocomplexes were stored for 72 h at 25℃ in the dark, and measured at 0 h, 24 h, 48 h, 72 h in the dark. Temperature rise profiles of (D) free ICG and (E) nanocomplexes at various concentrations. F. Infrared thermographic maps of PBS, free ICG and nanocomplexes (containing 20 µg/mL ICG) recorded by infrared thermal imaging instrument during 808 nm laser irradiation