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| Samples | IR region or bands (cm–1) | Descriptions |
|---|---|---|
| Zinc ferrite NPs | 3418 | v(OH) stretching |
| 1623 | v(OH) bending | |
| 403 | v(M–O) stretching | |
| 550 | v(M–O) stretching | |
| PEG-coated zinc ferrite NPs | 3436 | v(OH) stretching |
| 1620 | v(OH) bending | |
| 1085 | v(C–O–C) stretching | |
| 938 | v(C–H) bending | |
| 875 | v() bending | |
| 800 | v(Fe–OH) stretching | |
| 558 | v(M–O) stretching | |
| 443 | v(M–O) stretching |
