Research Article
In Vitro Bioactivity and Antimicrobial Tuning of Bioactive Glass Nanoparticles Added with Neem (Azadirachta indica) Leaf Powder
Table 2
Analysis of FTIR spectra of the bioactive glass nanoparticles.
| Wavenumbers (cm−1) | Peak assignments | References | Before in vitro | After in vitro | NBG | SNBG | NNBG | NBG | SNBG | NNBG |
| 473 | 473 | — | — | — | — | Si–O–Si stretching | [22] | 566 | 566 | 566 | 570 | 570 | 570 | vibration band | [22] | 606 | 606 | 606 | 607 | 607 | 607 | –P=O bending band, vibration band | [22, 23] | 804 | 804 | 804 | 807 | 807 | 807 | Symmetric Si–O–Si stretching in SiO4 tetrahedron | [22] | — | — | — | 876 | 876 | 876 | C–O stretching vibration band in | [28, 29] | 999 | 999 | 999 | 1084 | 1084 | 1084 | Asymmetric Si–O–S stretching in SiO4 tetrahedron | [22] | 1384 | 1384 | 1384 | — | — | — | O–H bending vibration band | [22] | — | — | — | 1420 | 1420 | 1420 | C–O stretching vibration band in | [28] | — | — | — | 1472 | 1472 | 1472 | C–O stretching vibration band in | [28] | 1641 | 1641 | 1641 | 1647 | 1647 | 1647 | O–H bending (molecular water) | [22] |
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