Table 2.
Binding energies of specific bonds existing in graphene oxide, reduced graphene oxide, DNA probe immobilized on RGO, and DNA probe on a plastic substrate (values for DNA probe: C–C, 284.7; C–O, 286.2; C=O, 287.8).
| Sample | GO | RGO | RGO + DNA probe | |
|---|---|---|---|---|
| 0.05 mg/mL | C–C | 285.4 | 284.8 | 284.7 |
| C–H | 285.1 | 285.5 | 285.4 | |
| C–O | 286.8 | 286.6 | 286.4 | |
| C=O | 288.5 | 288.2 | 288.1 | |
| 0.1 mg/mL | C–C | 284.8 | 284.8 | 284.7 |
| C–H | 285.4 | 285.5 | 285.4 | |
| C–O | 287.1 | 286.6 | 286.4 | |
| C=O | 288.6 | 288.2 | 288.1 | |
| 0.15 mg/mL | C–C | 284.7 | 284.8 | 284.7 |
| C–H | - | 285.6 | 285.4 | |
| C–O | 286.8 | 286.6 | 286.4 | |
| C=O | 288.5 | 288.1 | 288.3 | |
| 0.2 mg/mL | C–C | 284.7 | 284.8 | 284.7 |
| C–H | - | 285.5 | 285.4 | |
| C–O | 286.7 | 286.5 | 286.2 | |
| C=O | 288.3 | 288.1 | 288.4 |