Table 1 Particle size (intensity-averaged) and zeta potential of Fe3O4-CA, Fe3O4-NH2, Fe3O4-β-amino acid methyl ester, GO, GO-Cys, and Fe3O4@GO-Cys NPs in PBS (pH = 7.4)
Sample | Particle size (Mean ± SD, nm) | PDI | Zeta potential (Mean ± SD, nm) |
|---|---|---|---|
Fe3O4-CA | 16 ± 3 | 0.12 | -34.6 ± 3.3 |
Fe3O4-NH2 | 27 ± 11 | 0.18 | -22.7 ± 4.5 |
Fe3O4-β-amino acid methyl ester | 41 ± 18 | 0.25 | -34.3 ± 1.7 |
GO | 580 ± 73 | 0.35 | -55.6 ± 4.5 |
GO-Cys | 620 ± 32 | 0.41 | -46.5 ± 5.6 |
Fe3O4@GO-Cys | 759 ± 134 | 0.39 | -33.2 ± 4.2 |