Figure 3

(a) Transmission electron microscopy and (b) atomic force microscopy images of nGO and nGO@DOX-cPEG flakes. (c) In vitro release profiles of DOX at different pH conditions (P<0.01). (d) Effect of NIR on temperature elevations for the nGO and nGO@DOX-cPEG dispersions at different irradiation times. cPEG, chitosan-polyethylene glycol; DOX, doxorubicin; nGO, nanodimensional graphene oxide.