Figure 4

SEM images of H1299 cells incubated at different conditions: (A) control, (B) NIR irradiation, (C) tri-bead/azo microrobots, (D) tri-bead/azo/DOX, (E) tri-bead/azo with NIR irradiation for 24Â h, and (F) tri-bead/azo/DOX with NIR irradiation for 24Â h. The top and bottom images are zoomed-in and zoomed-out regions respectively.