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. 2023 Jul 13;21:224. doi: 10.1186/s12951-023-01961-9

Fig. 1.

Fig. 1

Characterization of nanomaterials. a TEM image of FePS NSs. b Elemental mapping obtained from TEM. c Map sum sepctrum of FePS NSs. d XRD patterns of the synthesized FePS NSs. e TEM image of FePS@PPF. f FT-IR spectra of bare FePS NSs, PPF, anti-miR19a, FePS@PPF and anti-miR-19a/FePS@PPF. g Zeta potentials of FePS NSs, PPF and FePS@PPF (n = 3). h Absorption spectra of FePS NSs and i FePS@PPF after storage in PBS for 14 days