Table 1.
Photoluminescence Quantum Yields of OA-, MPA-, and PPA-Capped CdS and CdSe QDs.a
| OA-capped (hexanes) | MPA-capped (aq, pH 7) | PPA-capped (aq, pH 7) | MPA-capped (aq, pH 11) | PPA-capped (aq, pH 11) | |
|---|---|---|---|---|---|
| CdS QDs | 8.1% | 0.09±0.02% | 0.024±0.016% | 0.011±0.001% | 0.058±0.047% |
| CdSe QDs | 10.1% | 0.15±0.01% | 0.60±0.34% | 0.017±0.001% | 1.6±1.0% |
a
Relative QYs were determined by comparison with a anthracene standard (CdS) or Rhodamine B standard (CdSe), and, for the aqueous samples, were measured within one day of phase transfer.