Table 1.
The theoretical (based on starting reaction mole% data), calculated (based on TEM images) and experimentally determined (based on ICP data) wt% and mole% compositions of Y3+, Yb3+, Er3+ and Nd3+ in the core, core-shell and core-shell-shell NPs.
| NPs | core | core-shell | core-shell-shell | ||||
|---|---|---|---|---|---|---|---|
| Compositions | wt % | mol % | wt % | mol % | wt % | mol % | |
| Theoretical calculation | Y | 64.6% | 78.0% | 65.9% | 79.0% | 58.8% | 72.7% |
| Yb | 32.3% | 20.0% | 32.5% | 20.0% | 31.5% | 20.0% | |
| Er | 3.1% | 2.0% | 1.6% | 1.0% | 1.0% | 0.7% | |
| Nd | 8.7% | 6.7% | |||||
| Calculated from TEM images | Y | 64.6% | 78.0% | 65.9% | 78.9% | 59.1% | 72.9% |
| Yb | 32.3% | 20.0% | 32.5% | 20.0% | 31.5% | 20.0% | |
| Er | 3.1% | 2.0% | 1.7% | 1.1% | 1.1% | 0.7% | |
| Nd | 8.3% | 6.3% | |||||
| Determined from ICP data | Y | 63.9% | 77.4% | 63.4% | 77.1% | 57.9% | 72.0% |
| Yb | 32.7% | 20.3% | 34.9% | 21.8% | 33.2% | 21.3% | |
| Er | 3.5% | 2.2% | 1.7% | 1.1% | 0.9% | 0.6% | |
| Nd | 8.0% | 6.1% | |||||