Table 7. The cell uptake of QDs by HeLa cells (10–4 ppb per cell).
| Serum free | With serum | |
| TGA-CdTe QDs | 1.98 ± 0.07 | 1.04 ± 0.01 |
| MPA-CdTe QDs | 2.60 ± 0.05 | 1.76 ± 0.04 |
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