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]