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The assignment of FT-IR bands for HA-modified surface.
| Function group | Wavenumber (cm−1) |
|---|---|
| C-O-C stretching, O-H deformation, C=O deformation | 894.9 |
| C-O-C, C-O, C-O-H stretching | 1049.1 |
| CH2, CH3 C-O-H deformation, C-O with C=O combination | 1321.0 |
| NH deformation | 1406.9 |
| C=O carboxyl amide I | 1616.1 |
| CH stretching | 2893.8 |
| NH with C=O combination | 3261.2 |
| NH stretching and OH stretching | 3433.8 |
