Table 2.
Summary of primary particle size, approximated particle morphology and main surface oxide composition of the metal and metal oxide NPs based on XRD, Raman and XPS measurements. See Figures S1–S3 and supporting information for surface analytical findings supporting the compositional analysis of the outermost surface oxide.
| Particle | Primary Size (TEM)/nm | Oxide Composition |
|---|---|---|
| Ag | Spherical, 5.2 ± 1.1 a | N/A |
| Au | Spherical, 5.2 ± 0.9 a | N/A |
| CdTe QDs | Spherical, 1.6, 2.6, 4.5, 6.5, 8.6 b | N/A |
| Cr | Cubic and spherical, 10–115 | Cr */Cr2O3 |
| Cr2O3 | Oval, 90–460 | Cr2O3 |
| Mn | Spherical, 15–50 | Mn */MnO/MnO2/Mn2O3/Mn3O4 |
| Mn3O4 | Cubic 20–180, rods 8000 × 400 | Mn3O4/MnO |
| Pt | Spherical, 4.8 ± 0.8 a | N/A |
| Sb | Irregular, 90–1200 | Sb */Sb2O3 |
| Sb2O3 | Spherical, 70–250 | Sb2O3 |
| Sn | Spherical, 20–250 | Sn */SnO/SnO2 |
| SnO2 | Spherical, 2–3 (as aggregates) | SnO2 |
| V | Rods 20 × 20 to 400 × 40 | V2O5/VO2 |
| V2O5 | Irregular 40–450 | V2O5/VO2 |
* metallic signal implies a thin surface oxide, <5–10 nm. N/A not analyzed. a from Lebedova et al. [23], b based on supplier information.