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. 2021 Dec 10;15:4961–4972. doi: 10.2147/DDDT.S330059

Figure 1.

Figure 1

GO and GO-PEI-PEG-CPP preparation and Characterization. (A) The representative AFM images of GO were demonstrated. (B) The UV-Vis absorption spectra of GO were shown. (C) The stability of GO-PEI-PEG-CPP was analyzed.