Synthesis and characterization of PEG-functionalized graphene oxide as an effective pH-sensitive drug carrier

Figures & data

Figure 1. The FT-IR spectrum of GO (green line) and GO-PEG 4000 (blue line).

Figure 2. The XRD pattern for GO (blue line) and GO-PEG 4000 (green line).

Figure 3. SEM images for GO (e–h) and GO-PEG 4000 (a–d).

Figure 4. The release profile for GO-PEG 4000 at two different pH.

Figure 5. The MTT assay for GO, GO:DOX, GO-PEG and GO-PEG:DOX at different concentrations.