Figure 3.
FTIR spectra of silica nanoparticles: lss-SiO2 (a,c) and hss-SiO2 (b,d) in all spectrum 580–3800 cm−1 (A). FTIR spectra in transmission mode (a,b) and in DRIFTs mode (c,d) in the range 3000–3800 cm−1 (B).
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