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. 2020 Mar 16;15:1823–1835. doi: 10.2147/IJN.S236683

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© 2020 Weng et al.

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XPS analyses of the Drp-Au-AgNPs.

Notes: Full-scan spectrum of Drp-Au-AgNPs (A) and core level of Au_4f (B) and Ag_3d (C). Dipole peaks for metal ions of different valence states are indicated by banding energy and arrows. The peak with red line is the fitting peak of dipole peaks and the other colored peaks are the characteristic peaks of metal ion with different valence state. The peak with yellow circle represents the signal value at each binding energy position. XPS analysis of Drp-Au-AgNPs provided evidence for the reduction process of Au and Ag ions.

Abbreviations: XPS, X-ray photoelectron spectroscopy; Drp-Au-AgNPs, D. radiodurans protein extract-mediated gold-silver bimetallic nanoparticles; D. radiodurans, Deinococcus radiodurans.