Fig. 2: Biosynthesis process and characterization of FeS@SRB prepared with an initial Fe2+ concentration of 200 mg L-1 and incubation for 48 h at 37 °C. | Nature Communications

Fig. 2: Biosynthesis process and characterization of FeS@SRB prepared with an initial Fe2+ concentration of 200 mg L-1 and incubation for 48 h at 37 °C.

From: Living therapeutics of nonpathogenic bacteria as biosynthesis factory and active carriers for enhancing tumor-targeted therapy

Fig. 2: Biosynthesis process and characterization of FeS@SRB prepared with an initial Fe2+ concentration of 200 mg L-1 and incubation for 48 h at 37 °C.

A Schematic illustration of the forming process and mechanism. B SEM-EDS elemental mapping images. Scale bar: 2.5 μm. C Size distribution measured by DLS at room temperature. D Zeta potential. n = 3 independent samples. Data are presented as mean ± SD. E UV-vis-NIR absorption spectra. F FTIR spectra. G XRD patterns. H XPS spectra of Fe 2p, S 2p of FeS@SRB. Source data are provided as a Source Data file. Images in the schematic illustration were provided by Servier Medical Art (https://smart.servier.com/) and licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).

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