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. 2017 Feb 24;7:42975. doi: 10.1038/srep42975

Figure 4.

Figure 4

C 1s core-level spectra of (a) GO, (b) GO-CuFe2O4 nanocomposite samples. (c) Fe 2p and (d) Cu 2p core-levels of GO-CuFe2O4 sample.