Assignment of SERS spectral bands in Fig. 4b.
| Shift (cm−1) | Component | SERS band assignment |
|---|---|---|
| 662 | Protein | C–S stretching mode of cysteine |
| 747 | Metabolite | Lactic acid |
| 795 | Protein | l-Serine |
| 827 | Protein | Tyrosine |
| 855 | Carbohydrates | Monosaccharides and disaccharides |
| 941 | Carbohydrates | C–O–C |
| 1000 | Protein | Phenylalanine |
| 1103 | Protein | Amide III and other groups |
| 1173 | Metabolite | Urea |
| 1250 | Nucleic acid | Guanine, cytosine (NH2) |
| 1300 | Fatty acid | CH2 twisting modes |
| 1335 | Protein | CH3CH2 wagging |
| 1365 | Metabolite | Creatinine |
| 1396 | Nucleic acid | Inosine |
| 1444 | Fatty acid | CH2 bending mode |
| 1579 | Nucleic acid | Ring breathing modes in the DNA bases |
| 1605 | Protein | Phenylalanine |
| 1657 | Fatty acid | ν(C C) |