Figure 2

TEM images of (a) Fe3O4, (b) Fe3O4@MPS and (c) Fe3O4@MPS@PMAC. SEM images of (d) Fe3O4, (e) Fe3O4@MPS and (f) Fe3O4@MPS@PMAC.
TEM images of (a) Fe3O4, (b) Fe3O4@MPS and (c) Fe3O4@MPS@PMAC. SEM images of (d) Fe3O4, (e) Fe3O4@MPS and (f) Fe3O4@MPS@PMAC.