Fig. 1

Characterization of FessMOF nanoparticles. (a) Representative TEM images of FessMOF. (b) HAADF-STEM and EDX element mapping images of FessMOF. (c) EDX analysis of FessMOF. (d) The average size of FessMOF. (e) PXRD pattern of FessMOF. (f) Full range XPS spectra of FessMOF, deconvoluted XPS survey of (g) S 2p and (h) Fe 2p. (i) The ratio of the Fe2+/Fe3+ in Fe 2p. (j) FTIR spectra. (k) Comparison of UV-vis absorbance of different formulas, inset is the TEM image of FessMOF/ActD-PEG nanoplatform