Table 1.
Physicochemical characterization of IONP
| Particle | Primary size range (nm)a | Hydrodynamic size (nm)b (% of total population) | Zeta potential (mV)c | |
|---|---|---|---|---|
| Primary | Agglomerates | |||
| IONP-bare | 4.9–25.5 | 6.2±0.5 (71.21) | 75±14 (19.01) | −14.1±1.8 |
| IONP-PVP | 4.4–65.7 | 6.5±1.0 (83.36) | 75.6±10.8 (0.024) | −13.3±2.5 |
| IONP-PEG | 1.8–11.21 | 6.4±0.6 (65.1) | 31.0±2.80 (31.8) | −46.3±3.8 |
Notes:
a
Size distribution of pristine materials reported in Escamilla Rivera et al.69
b
Size distribution of IONP suspended in saline solution obtained by centrifugal liquid sedimentation (distribution based on particle number). Values are expressed as mean ± SD, and those in parenthesis represent the percentage from the total measured population.
b
Laser Doppler microelectrophoresis of IONP suspended in saline solution. Values are expressed as mean ± SD.
Abbreviations: IONP, iron oxide nanoparticles; PEG, polyethyleneglycol; PVP, polyvinylpyrrolidone.