Table 1 Lifetimes of the (CdSe/ZnS)-Cys QD luminescence decay curve components in phosphate buffer (7.5 mM) at pH 7.3: fresh QD and those after 3 months in the refrigerator at 276 K (aged QD) in the absence and presence of TPPS4, λex = 480 nm, λem = 558 nm
Sample | τ1, ns | τ2, ns | τ3, ns |
|---|---|---|---|
Fresh QD | 0.7 ± 0.1 | 3.8 ± 0.4 | 19 ± 1 |
Fresh QD + 8.6μМ [TPPS4] | 0.7 ± 0.1 | 4.1 ± 0.5 | 20 ± 1 |
Aged QD | 0.1 ± 0.1 | 1.0 ± 0.2 | 5.2 ± 0.5 |
Aged QD + 5.0μМ [TPPS4] | 0.1 ± 0.1 | 0.9 ± 0.2 | 5.2 ± 0.5 |