Nucleation of hydroxyapatite layer on wollastonite material surface: FTIR studies

Formation of Porous Apatite Layer during In Vitro Study of Hydroxyapatite-AW Based Glass Composites

“…Similar absorption bands were observed in the composite of the same composition at any soaking time. In Figure 8 [21,23]. These are the characteristic absorptions of calcium phosphate which suggest the formation of apatite layer on the surface of the samples after soaking in SBF solution.…”

“…Chemical bonds in different environments will absorb energy at varying intensity and frequency. The frequencies at which there are absorptions of IR radiation can be correlated to bond types within the substance [19][20][21].…”

Alkali activation of a novel calcium‐silicate hydraulic binder with CaO/SiO2 = 1.1

“…However, in the sample activated with Na 2 CO 3 , some features assigned to the presence of were also present, that is, the signals at 1420 and 875 cm −1 attributed to asymmetric stretching (ν 3 []) and in‐plane bending (ν 2 []) vibration modes, respectively. In addition, the in‐plane bending mode (ν 4 []) was present at ~712 cm −1 ; however, it partially overlapped with the feature at 719 cm −1 , caused by the bridging Si‐O‐Si stretching vibrations of its 3‐membered ring structures, that is, related to the presence of pseudowollastonite. In addition to the feature at 719 cm −1 , pseudowollastonite also presented a signal at 985 cm −1 , corresponding to the stretching vibration mode of non‐bridging Si‐O − , which is more evident in the anhydrous sample and decreases after hydration.…”

“…In addition, the in‐plane bending mode (ν 4 []) was present at ~712 cm −1 ; however, it partially overlapped with the feature at 719 cm −1 , caused by the bridging Si‐O‐Si stretching vibrations of its 3‐membered ring structures, that is, related to the presence of pseudowollastonite. In addition to the feature at 719 cm −1 , pseudowollastonite also presented a signal at 985 cm −1 , corresponding to the stretching vibration mode of non‐bridging Si‐O − , which is more evident in the anhydrous sample and decreases after hydration. Other silicate‐related bands revealing structural information were observed in 3 different main regions.…”

The structure and properties of the carbon non-wovens modified with bioactive nanoceramics for medical applications

“…For this reason attempts have been made to modify chemical properties of carbon fibers. Improvement of biological activity of carbon fibers can be achieved by filling a polymer precursor fibers with bioactive fillers including natural or synthetic HAp, bioglass or wollastonite [11,12].…”