Table 2.
Experimentally measured FTIR frequencies and wavenumber shifts (in cm−1) of SOPC MLVs in the absence and presence of different concentrations of AuNPs (0.5, 1, and 2 wt.%).
| Samples | Choline C–H Stretching (cm−1) |
Methylene C–H Antisymmetric Stretching (cm−1) |
Methylene C–H Symmetric Stretching (cm−1) |
C=O Stretching (cm−1) |
PO2− Antisymmetric Stretching (cm−1) |
Choline C–N Peak Height Position (cm−1) |
|---|---|---|---|---|---|---|
| Pure SOPC | 3011.0 | 2923 | 2850.0 | 1738.2 | 1250.0 | 969.5 |
| SOPC + 0.5% AuNPs | 3010.0 | 2922.5 | 2849.7 | 1738.0 | 1249.8 | 969.5 |
| SOPC + 1% AuNPs | 3009.6 | 2922.0 | 2849.1 | 1737.8 | 1249.5 | 969.3 |
| SOPC + 2% AuNPs | 3008.2 | 2921.0 | 2848.5 | 1737.3 | 1249.2 | 969.0 |