Fig. 2
From: Calcium phosphates and silicon: exploring methods of incorporation
FTIR spectrum of CaP-A (a) and CaP-I (b) coatings made with (a) 0, (b) 1, (c) 5 and (d) 10 mM of Si. The main PO4 3− and CO3 2− groups and peaks are indicated. Results showed a decrease in H2O and PO4 3− groups with the increase in Si content. Furthermore, the presence of SiO4 4− was also observed in both CaP-A and CaP-I with 10 mM of Si