Table 2 SERS peak assignment of different biofilm- forming bacterial strains.
SERS peaks (cm−1) | Peak assignment | Components | References |
|---|---|---|---|
533 | S–S str., COC glycosidic ring def | Carbohydrates | |
625 | d(NCO) Tyrosine | DNA/RNA | |
676 | Guanine | DNA/RNA | |
698 | -C-S- stretching vibrations | Protein | |
730 | Adenine | DNA/RNA | |
771 | polysaccharides; COO − wagging and C–C skeletal | Carbohydrates | |
803 | n(PO2), n(CC) ring breathing | DNA | |
822 | Tyrosine | DNA/RNA | |
875 | CC stretching, COC 1,4-glycosidic linkage saccharides | Proteins | |
944 | Lipid components | Lipids | |
1007 | CC aromatic ring –phenylalanine, and skeletal stretching of tryptophan; CCH stretching of carotenoids | Proteins | |
1025 | n(CC) aromatic ring, –phenylalanine, and skeletal stretching of tryptophan | Proteins | |
1050 | Carbohydrates, C–C, C–O, –C–OH def | Carbohydrates | |
1128 | CC unsaturated fatty acids | Lipids | |
1197 | Tyrosine | DNA/RNA | |
1252–1260 | Amide III | Proteins | |
1326 | Tyrosine Ring vibration /CH vibration | Proteins | |
1410 | ν (CO2) (α -amino acids) | Proteins | |
1451 | CH2 scissoring (phospholipids and fatty acid) | Proteins | |
1472 | CH2 deformation (lipids) | Lipids |
