Figure 4

TEM images of (A) Fe3O4, (B) Fe3O4 (HRTEM), (C) Fe3O4@BTCA, (D) Fe3O4@BTCA@C.R. SEM images of (E) Fe3O4 and (F) Fe3O4@BTCA.

TEM images of (A) Fe3O4, (B) Fe3O4 (HRTEM), (C) Fe3O4@BTCA, (D) Fe3O4@BTCA@C.R. SEM images of (E) Fe3O4 and (F) Fe3O4@BTCA.