Table 1.
BE of different components of C 1s peak obtained after the face was functionalized with ODT, TAT peptide, and a mixed adlayer of ODT and TAT peptide.
| Surface | BE (eV) | Relative area of C 1s components (%) | Peak assignment |
|---|---|---|---|
| ODT | 284.8 | 93.2 | C–C and C–H |
| 285.9 | 6.8 | C–Oa | |
| TAT Peptide | 284.8 | 15.2 | C–C and C–H (TAT) |
| 286.4 | 11.3 | C–N and C–O (TAT)b | |
| 288.2 | 8.4 | Amide C and C=O(TAT)c | |
| 289.6 | 3.0 | Arginine (TAT) | |
| 285.0 | 62.1 | Residual hydrocarbons | |
| Mixed Adlayer | 284.8 | 8.2 | C–C and C–H (TAT) |
| (ODT∕TAT Peptide) | 286.5 | 6.1 | C–N and C–O (TAT) |
| 288.1 | 4.5 | Amide C and C=O(TAT) | |
| 289.7 | 1.6 | Arginine (TAT) | |
| 285.0 | 79.7 | C–C and C–H (ODT) |
a
Due to residual hydrocarbons appeared during sample transfer through atmosphere.
b
For simplicity carbon atoms bond to nitrogen and oxygen were fitted with one peak.
c
For simplicity carbon atoms from amide group and double bond to oxygen were fitted with one peak.