Figure 5.
Representative FTIR spectra of (a) SiO2/PEG12 wt%/Fe(II)C5 wt% not soaked in SBF; (b) SiO2/PEG12 wt%/Fe(II)C5 wt%; (c) SiO2/PEG12 wt%/Fe(II)C10 wt%; (d) SiO2/PEG12 wt%/Fe(II)C15 wt%; after 21 days of exposure to SBF.
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