| C1s | ||||||||
|---|---|---|---|---|---|---|---|---|
| SiO2-NH2 | SiO2-GOQDs | |||||||
| C–H, C–C | C–N | C–O | C C | CH, C–C | C–N | C–O | OCO | |
| eV | 285.1 | 286.3 | 287.7 | 284.7 | 285.1 | 286.2 | 287.7 | 288.9 |
| % | 69 | 25 | 6 | 5 | 47 | 31 | 8 | 9 |
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