Summary of the peaks observed by means of PM-IRRAS and DPM-IRRAS before and after the plasma treatments.
| Peak position (cm−1) | Peak assignment | |||
|---|---|---|---|---|
| Solvent cleaned | Ar plasma | Ar/O2 plasma | Ar/H2O plasma | |
| 860 | 855 | 860 | Zn5(CO3)2(OH)6 2,26 | |
| 920 | — | 940 | 940 | LO(Al2O3)30 |
| 1020 | 1020 | 1020 | 1020 | δ(OCH)29 |
| 1090 | 1070 | 1070 | 1070 | γ(AlOOH)30,31 |
| 1150–1320 | 1150–1320 | 1150–1320 | Absorbed CO32− | |
| 1440 | 1440 | 1450 | 1450 | δ(CO2−) from both carbonates and carboxylates27,28,31 |
| 1465 | δ(CH2)31 | |||
| 1540 | 1535 | 1520 | 1510 | Absorbed CO32- |
| 1620 | 1630 | 1630 | 1625 | ν(CO−2) from carboxylates,28,32δ(H2O)30 |
| 2850–2960 | 2850–2960 | 2850–2960 | 2850–2960 | ν s(CH2), νs(CH3), νa(CH2), νa(CH3)28 |
| 3500–3200 | 3500–3200 | 3500–3200 | 3500–3200 | ν(OH)30 |