Table 1.
Hydrodynamic size, polydispersity index, zeta potential and dry size of TiO2, SiO2, and PS NPs. NTA, DLS and zeta potential samples were prepared in DI water. Over 50 particles of each type of GNPs were measured from SEM images. Results are presented as mean ± standard deviation (SD).
| Nanoparticle | Size (nm) (NTA) | Size (nm) (DLS) | ζ-Potential (mv) (DLS) | Polydispersity Index (PDI) (DLS) | Size (nm) (SEM) |
|---|---|---|---|---|---|
| TiO2 | 103.7±42.2 (DI) | 120.6±30.6 (DI) | −44.3 (DI) | 0.154 (DI) | 31.6±3.0 |
| 140.6±1.1 (EGM-2) | 174.8±3.0 (EGM-2) | −9.5 (EGM-2) | 0.31 (EGM-2) | ||
| SiO2 | 121.8±38.3 (DI) | 219.9±65.6 (DI) | −46.1 (DI) | 0.129 (DI) | 26.6±3.8 |
| 204.0±0.5 (EGM-2) | 254.5±0.72 (EGM-2) | −7.9 (EGM-2) | 0.27 (EGM-2) | ||
| PS | 81.1±16.4 (DI) | - | - | - | 25.0±2.0 |
| 93.7±2.0 (EGM-2) | - | - | - |