XPS elemental analysis results of R-CDs, O-CDs and Y-CDs.
| Sample | C (mol%) | O (mol%) | N (mol%) |
|---|---|---|---|
| R-CDs | 73.18 | 10.44 | 16.38 |
| O-CDs | 76.16 | 13.88 | 9.96 |
| Y-CDs | 71.98 | 18.00 | 10.02 |
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