Figure 6.
Survey XPS spectra of lyophilized composites D@GO-COOH and D@GO-COOH@(PEI/PAA)8 (a); Deconvolution of XPS peaks of the core-shell composite D@GO-COOH@(PEI/PAA)8: (b), C(1s); (c), O(1s); (d), N(1s).
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