Table 1.
Morphological and structural properties of ENMs
| ENM | Primary Particle Size | Crystal Structure | ||||
|---|---|---|---|---|---|---|
|
| ||||||
| SSA (m2/g) | dBET (nm) | dTEM (nm) | dXRD (nm) | Crystal System | Crystallinity (%) | |
| SiO2 | 152.3±7.5 | 15.4±1.0 | N/A | N/A | N/A | amorphous |
| Al2O3 | 51.1±1.0 | 32.6±1.7 | 28.1±13.1 | 12.2 | monoclinic (52%) | 68 |
| orthorhombic (48%) | ||||||
| Ag | 31.2±0.5 | 18.3±0.3 | 25.6±6.5 | 12.3 | cubic | 65 |
| 3.5%Ag/SiO2 | 359.8±14.4 | 9.3 (Ag) | 10.6±7.1 (Ag) | 7.9 (Ag) | cubic | 91 |
| 7.1±0.4 (SiO2) | ||||||
| 15%Ag/SiO2 | 333.1±3.1 | 6.4 (Ag) | 7.9±4.3 (Ag) | 5.8 (Ag) | cubic | 87 |
| 6.1±0.1 (SiO2) | ||||||
| s-CeO2 | 129.5±5.2 | 5.3±0.2 | 10.5±5.0 | 7.8 | cubic | 72 |
| l-CeO2 | 28.5±1.1 | 27.9±1.1 | 34.7±22.9 | 36.3 | cubic | 86 |
| s-Fe2O3 | 130.6±5.2 | 10.2±0.5 | 9.9±3.8 | 6.9 | cubic | 35 |
| l-Fe2O3 | 11.0±0.4 | 112.6±4.5 | 108.9±47.5 | 46.8 | cubic | 87 |
ENM, engineered nanomaterial; SSA by nitrogen adsorption/Brunauer-Emmett-Teller (BET) method; dBET, dTEM and dXRD, particle diameter determined from SSA, transmission electron microscopy (TEM) analysis and X-ray diffraction (XRD), respectively.