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. 2018 Feb 7;13:45. doi: 10.1186/s11671-018-2459-8

Fig. 3.

Fig. 3

XPS characterization of functionalized MNPs. High-resolution P 2p, C 1s, and N 1s XPS spectral regions of a) NH2@MNPs, b) PEG,FA@MNPs, and c) gH625@MNPs