Figure 4.

Photothermal effect and thermal stability.

Notes: (A, B) Photothermal heating curves and the corresponding thermal images of water, GO, and PTX-GHP-VEGF solution at the same concentrations of GO under 808-nm laser irradiation (1 W/cm²). (C) UV–vis absorption spectra of PTX-GHP-VEGF solution before and after irradiations of 808-nm laser for 5 minutes, and (D) their corresponding TEM images.

Abbreviations: PTX, paclitaxel; GO, graphene oxide; VEGF, vascular endothelial growth factor; TEM, transmission electron microscopy; NIR, near infrared; Abs, absorbance; UV, ultraviolet; vis, visible; GHP, GO-HSA-PEG.