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Zeta potential and cellular uptake of 10 nm and 40 nm SPIONs before and after coating with poly(acrylic acid).
| 10 nm | 40 nm | |||
|---|---|---|---|---|
| SPION- COOH |
SPION- COOH-PAH |
SPION- COOH |
SPION- COOH-PAH |
|
| zeta potential (mV) | −42 ± 3.1 | 54 ± 1.8 | −27.2 ± 1.5 | 38 ± 2.9 |
| mass of Fe taken up by 3 × 106 FOCUS cells (µg) | 2.0 ± 0.06 | 34.4 ± 3.97 | 8.4 ± 0.19 | 38.2 ± 1.47 |
