| Nanoparticles | Before storage | After storage (three months) | ||||
| MD (nm) | PDI | Zeta potential (mV) | MD (nm) | PDI | Zeta potential (mV) | |
| NP1 | 225 ± 1.9 | 0.131 ± 0.012 | −30.2 ± 0.86 | 228 ± 1.5 | 0.129 ± 0.015 | −32.8 ± 0.43 |
| NP2 | 319 ± 1.3 | 0.092 ± 0.006 | −33.1 ± 1.10 | 322 ± 1.4 | 0.106 ± 0.008 | −31.6 ± 0.26 |
| NP3 | 490 ± 0.9 | 0.023 ± 0.009 | −30.6 ± 0.63 | 496 ± 1.1 | 0.028 ± 0.009 | −31.2 ± 0.18 |