Table 1. Comparison of Cap-Exchange Conditions and Retained Fluorescence for Some DHLA-Based Ligand-Capped QDsa.
| LQMR (in 103) | time | QD type | ligand | retained original QD fluorescence (%) | ref |
|---|---|---|---|---|---|
| ∼42 | ∼2 h | CdSe/ZnxCd1–xS | DHLA-PEG-NH2 | 46–62 | (34) |
| ∼22 | ∼0.5 h | CdSe/ZnS | DHLA-SB | 29–43 | (35) |
| ∼22 | ∼0.5 h | CdSe/CdS/ZnS | DHLA-SB | 71–85% | (35) |
| ∼40 | 60 min (hν) | CdSe/ZnS | Bis(LA)-ZW | 50–70 | (37) |
| ∼41 | 2 h | CdSe/ZnS | DHLA-Zn2+ | 28–57 | (44) |
| ∼22–50 | ∼20 min (hν) | CdSe/ZnS | LA-PEG/NH2/F | 50–70 | (47) |
| 40–60 | ∼30 min (hν) | CdSe/ZnS | LA-PEG/F | 50–70 | (49) |
| 10–100 | 2 h | InP/ZnS | DHLA | 11 | (50) |
| ∼10 | ∼2 h | CdSe/ZnS | DHLA | 3.4–53b | (51) |
| ∼40 | 2.5 h | CdSe/CdS | DHLA-PEG | ∼8 | (52) |
| ∼40 | 2.5 h | CdSe/CdS/ZnS | DHLA-PEG | ∼26 | (52) |
| 98 | overnight | CdSe/ZnS | DHLA-F | 40–57% | (53) |
| 0.5 | ∼1 min | CdSe/ZnS | DHLA-PEG/ZW | >90 | this work |
| 0.6 | ∼1 min | CdSe/ZnSe/ZnS | DHLA-ZW | >95 | this work |
a
hν: photoirradiation. DHLA-F: DHLA modified with functional group.
b
The retained QD fluorescence varied significantly for different colored QDs.