Table 2.

μ-RS and FT-IR main peak assignments for PDL samples References [23,28,29,39].

Assignment Mode	Peak Position Raman (cm−1)				Peak Position FT-IR (cm−1)
	0	2	7	14	0	2	7	14
PO2− asymmetric stretching C-O-P stretching					1239
Amide III (β-sheet)	1243	1245	1247	1252
Amide III (random coil)	1258	1265	1266	1273
Amide III (α-helix)	1309	1307	1310	1307
CH2	1450				1455
Amide II					1544
Amide I (310-helix; β-sheet)	1617	1619	1618	1621	1631
Amide I (α-helix)	1642	1643	1641	1642	1650
Amide I (β-turn)	1668	1662	1661	1666	1661
Amide I (β-sheet)	1695	1687	1690	1695	1673
CH2 asymmetric stretching	2875				2926
CH3 symmetric stretching	2930				2873
CH3 asymmetric stretching	2970				2960