Table 1. Dye loading efficiency and oxygen sensitivity of various G2-loaded nanosensors.
| nanosensor ID1 | input | dye-loading Efficiency2 (%) | dye loading per nanosensors (%wt) | sensitivity3 | |||||
|---|---|---|---|---|---|---|---|---|---|
| G2/Total monome r (μg/mg) | EDC/G2 (mol/mol) | APMA/G2(mol/mol) | RN2/RAir | RN2/RO2 | QDO-Air | QDO-O2 | |||
| Enc-PAA | 2.6 | - | - | 0.7% | 0.0018 | 6.8 | 23 | 85% | 96% |
| Enc-AFP-1 | 2.9 | - | 540 | 24% | 0.069 | 3.7 | 9.9 | 73% | 90% |
| Enc-AFP-2 | 4.5 | - | 188 | 22% | 0.099 | 5.4 | 17 | 82% | 94% |
| Cov-AFP-1 | 2.5 | 92 | 676 | 62% | 0.16 | 2.3 | 6.6 | 57% | 85% |
| Cov-AFP-2 | 4.5 | 98 | 419 | 67% | 0.30 | 4.7 | 13 | 79% | 92% |
| Cov-AFP-3 | 4.7 | 18 | 188 | 64% | 0.30 | 8.0 | 28 | 88% | 96% |
| Cov-AFP-4 | 9.5 | 8.9 | 93 | 46% | 0.44 | 7.4 | 25 | 87% | 96% |
| Cov-AFP-5 | 16.8 | 18 | 53 | 72% | 1.2 | 7.5 | 25 | 87% | 96% |
| Cov-AFP with BSA | 4.8 | 18 | 188 | 21% | 0.10 | 2.9 | 6.6 | 66% 85% | |
1
The nanosensor ID indicates the dye loading method as well as nanoparticle matrix. Enc and Cov denote encapsulation and covalent bonding of G2 dyes inside nanoparticles, respectively, while PAA and AFP denote polyacrylamide and amine-functionalized polyacrylamide matrixes, respectively.
2
The dye loading efficiency is defined as the percentage of the loaded dye amount with respect to the input amount.
3
The sensitivity values in this table, represented by RN2/RAir (or O2) and QDO were measured at room temperature.