Fig. 6.

a Synthesis of GQD-PEG-P and Schematic Presentation of GO-PEG-P Theranostic Platform for Intracellular miRNA Detection and the Combined Photothermal/Photodynamic Therapy. b Photothermal profile of GQD-PEG-P. a Thermal images of vials containing water and GQD-PEG-P solution (100 μg/mL). b Photothermal heating curves of water (a) and (b–f) solutions containing GQD-PEG-P at different concentration (10, 25, 50, 100, and 200 μg/mL); c photothermal effect of the NIR irradiation to GQD-PEG-P solutions (100 μg/mL) with the NIR laser was shut off after irradiation for 10 min. d Thermal images taken with 2 min interval of vials containing pellets of GQD-PEG-P-exposed A549 cells at the concentration of 100 μg/mL. Reprinted with permission from Cao et al. (2017), Applied Materials. Copyright 2017, American Chemical Society (Cao et al. 2017)