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FTIR peak positions indicating the presence of Self-assembled monolayer for the biosensor.
| Description | Expected Peak position | Peak position obtained |
|---|---|---|
| Stretching of CH alkane chain | 3409 cm−1 | 3000 cm−1 |
| Symmetric carbonyl stretch of NHS in DSP linker | 1745 cm−1 | 1744 cm−1 |
| CH2 bending | 1431 cm−1 and 1456 cm−1 | 1458 cm−1 |
| CH3 bending | 1372 cm−1 | 1372 cm−1 |
| Amide-I bond | 1500–1550 cm−1 | 1558,1540,1506 cm−1 |
| Amide-II bond | 1652 cm−1 | 1652 cm−1 |
