Table 1.
Compositions obtained by ICP-AES for the analysis of Fe3O4, Gd:Fe3O4, Au-seeded functionalized Gd:Fe3O4, and gold-silver alloy nanoshells on gold-seeded amine-functionalized Gd:Fe3O4
| Sample | Gd ppm | Fe ppm | Au ppm | Ag ppm | Gd:Fe | Au:Ag |
|---|---|---|---|---|---|---|
| Fe3O4 | 0 | 70.1 | 0 | 0 | - | - |
| Gd: Fe3O4 | 11.6 | 57.7 | 0 | 0 | 0.2 | - |
| Au-seeded Gd: Fe3O4 | 12.2 | 62.6 | 1 | 0 | 0.2 | - |
| Au-Ag alloy = 1:1 nanoshells on Au-seeded amine-functionalized Gd: Fe3O4 | 7.0 | 40.4 | 6.8 | 19.5 | 0.2 | 0.4 |
| Au-Ag alloy = 5:1 nanoshells on Au-seeded amine-functionalized Gd: Fe3O4 | 7.7 | 67.6 | 24.0 | 4.5 | 0.1 | 5.3 |