Physicochemical characteristics of GO, GO–CS and GO–PEG.
| GO | GO–CS | GO–PEG | |
|---|---|---|---|
| Mean size (nm) | ∼170 | ∼220 | ∼600 |
| Zeta potential (mV) | −44 | +32 | −9 |
| PDI | 0.63 | 0.32 | 0.41 |
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