Table 1.
Physicochemical properties of reaction steps in HNP formation using photon correlation spectroscopy (PCS), zeta potential measurement and inductively coupled plasma-optical emission spectroscopy (ICP-OES)
|
Particle |
Hydrodynamic Radius nm ± SD |
Polydispersity Index ± SD |
Zeta Potential mV ± SD |
Concentration determined by Inductively Coupled Plasma – Optical Emission Spectroscopy mgmL-1(Average value, n = 2) |
|
|---|---|---|---|---|---|
| Fe | Au | ||||
| Fe3O4 |
1112 (97) |
0.763 (0.104) |
-16.9 (0.379) |
14.5 |
- |
| Fe3O4-PEI |
237 (2) |
0.194 (0.030) |
+55.6 (0.702) |
13.5 |
- |
| Fe3O4-PEI-Auseed |
309 (12) |
0.363 (0.016) |
+35.0 (0.115) |
1.86 |
3.36 |
| Fe3O4-PEI-Aucoat |
132 (37) |
0.792 (0.156) |
-23.3 (1.950) |
2.74 |
3.53 |
| Fe3O4-PEI-Au-PEG | 139 (71) | 0.332 (0.072) | -21.7 (0.551) | 2.20 | 3.06 |