Synthesis of colloidal solutions with silicon nanocrystals from porous silicon

Table 2 FTIR spectra of C-Si-nc suspensions

Peak number	Wavenumber (cm^-1)	Group	Vibrational modes	Reference
1	900	SiH₃	Degenerate deformation	[46, 47, 49]
2	1,113, 1,080, 1,092	Si-O-Si in SiO₂	Stretching	[46–49]
3	880	O₃SiH in SiO₂	Bending	[47, 49]
4	1,200 to 1,236	Si-CH₃ or Si-CH₂	Symmetric bending	[50]
5	1,360	C-H	Bending	[50]
6	1,390 to 1,460	C-CH₃ or SiCH_{3 or 2}	Deformation or scissoring	[50]
7	1,710	Carboxyl		[48]
8	2,350	CO₂	Room ambience	[47]
9	1,020	Si-OR	Stretching	[50]
10	2,880	C-CH_{2 or 3}	Stretching	[50, 51]
11	2,974	C-CH₃ or Si-CH₃	Asymmetric stretching	[50]
12	2,820	C-CH₂	Symmetric stretching	[50]
13	1,740	Ambient water vapor		[47]