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Neutral Red Raman peak assignment.
| 1 mM Solution (cm−1) | PG Heparin Au NPs (cm−1) | RG Heparin Au NPs (cm−1) | Band Assignment |
|---|---|---|---|
| 1605 (w) | 1618 (w) | 1609 (m) | Scissor vibration of primary amines |
| 1341 (vw) | 1336 (w) | 1374 (m) | C‑N stretching vibration. |
| 1370 (w) | 1370 (w) | 1403 (w) | C‑N stretching vibration |
| 1459 (vw) | 1470 (w) | 1472 (w) | CH3 deformation vibration |
